[{"_1":2,"_1089":-5,"_1090":-5},"loaderData",{"_3":4,"_546":547,"_842":843},"root",{"_5":6,"_11":-5,"_12":13,"_14":-5,"_15":16,"_17":18,"_334":335,"_337":338,"_339":16,"_340":341,"_398":343,"_399":345,"_346":347,"_400":401,"_422":423,"_447":-5,"_448":-5,"_449":450},"userId",{"_7":8,"_9":10},"id","nhgjfeflx3e1vfu9faqmnkdp","type","cookie.randomId","preferences","progress",[],"user","userHasAccess",false,"apps",[19,26,30,34,38,42,46,50,54,58,62,66,70,74,78,82,86,90,94,98,102,106,110,114,118,122,126,130,134,138,142,146,150,154,158,162,166,170,174,178,182,186,190,194,198,202,206,210,214,218,222,226,230,234,238,242,246,250,254,258,262,266,270,274,278,282,286,290,294,298,302,306,310,314,318,322,326,330],{"_20":21,"_22":23,"_24":25},"name","01.01.problem","fullPath","/myapp/workshop-content/exercises/01.js-hello-world/01.problem.hello","relativePath","exercises/01.js-hello-world/01.problem.hello",{"_20":27,"_22":28,"_24":29},"01.01.solution","/myapp/workshop-content/exercises/01.js-hello-world/01.solution.hello","exercises/01.js-hello-world/01.solution.hello",{"_20":31,"_22":32,"_24":33},"01.02.problem","/myapp/workshop-content/exercises/01.js-hello-world/02.problem.root","exercises/01.js-hello-world/02.problem.root",{"_20":35,"_22":36,"_24":37},"01.02.solution","/myapp/workshop-content/exercises/01.js-hello-world/02.solution.root","exercises/01.js-hello-world/02.solution.root",{"_20":39,"_22":40,"_24":41},"02.01.problem","/myapp/workshop-content/exercises/02.raw-react/01.problem.elements","exercises/02.raw-react/01.problem.elements",{"_20":43,"_22":44,"_24":45},"02.01.solution","/myapp/workshop-content/exercises/02.raw-react/01.solution.elements","exercises/02.raw-react/01.solution.elements",{"_20":47,"_22":48,"_24":49},"02.02.problem","/myapp/workshop-content/exercises/02.raw-react/02.problem.nesting","exercises/02.raw-react/02.problem.nesting",{"_20":51,"_22":52,"_24":53},"02.02.solution","/myapp/workshop-content/exercises/02.raw-react/02.solution.nesting","exercises/02.raw-react/02.solution.nesting",{"_20":55,"_22":56,"_24":57},"02.03.problem","/myapp/workshop-content/exercises/02.raw-react/03.problem.deep-nesting","exercises/02.raw-react/03.problem.deep-nesting",{"_20":59,"_22":60,"_24":61},"02.03.solution","/myapp/workshop-content/exercises/02.raw-react/03.solution.deep-nesting","exercises/02.raw-react/03.solution.deep-nesting",{"_20":63,"_22":64,"_24":65},"03.01.problem","/myapp/workshop-content/exercises/03.using-jsx/01.problem.compiler","exercises/03.using-jsx/01.problem.compiler",{"_20":67,"_22":68,"_24":69},"03.01.solution","/myapp/workshop-content/exercises/03.using-jsx/01.solution.compiler","exercises/03.using-jsx/01.solution.compiler",{"_20":71,"_22":72,"_24":73},"03.02.problem","/myapp/workshop-content/exercises/03.using-jsx/02.problem.interpolation","exercises/03.using-jsx/02.problem.interpolation",{"_20":75,"_22":76,"_24":77},"03.02.solution","/myapp/workshop-content/exercises/03.using-jsx/02.solution.interpolation","exercises/03.using-jsx/02.solution.interpolation",{"_20":79,"_22":80,"_24":81},"03.03.problem","/myapp/workshop-content/exercises/03.using-jsx/03.problem.spread","exercises/03.using-jsx/03.problem.spread",{"_20":83,"_22":84,"_24":85},"03.03.solution","/myapp/workshop-content/exercises/03.using-jsx/03.solution.spread","exercises/03.using-jsx/03.solution.spread",{"_20":87,"_22":88,"_24":89},"03.04.problem","/myapp/workshop-content/exercises/03.using-jsx/04.problem.nesting","exercises/03.using-jsx/04.problem.nesting",{"_20":91,"_22":92,"_24":93},"03.04.solution","/myapp/workshop-content/exercises/03.using-jsx/04.solution.nesting","exercises/03.using-jsx/04.solution.nesting",{"_20":95,"_22":96,"_24":97},"03.05.problem","/myapp/workshop-content/exercises/03.using-jsx/05.problem.fragments","exercises/03.using-jsx/05.problem.fragments",{"_20":99,"_22":100,"_24":101},"03.05.solution","/myapp/workshop-content/exercises/03.using-jsx/05.solution.fragments","exercises/03.using-jsx/05.solution.fragments",{"_20":103,"_22":104,"_24":105},"04.01.problem","/myapp/workshop-content/exercises/04.components/01.problem.function","exercises/04.components/01.problem.function",{"_20":107,"_22":108,"_24":109},"04.01.solution","/myapp/workshop-content/exercises/04.components/01.solution.function","exercises/04.components/01.solution.function",{"_20":111,"_22":112,"_24":113},"04.02.problem","/myapp/workshop-content/exercises/04.components/02.problem.raw","exercises/04.components/02.problem.raw",{"_20":115,"_22":116,"_24":117},"04.02.solution","/myapp/workshop-content/exercises/04.components/02.solution.raw","exercises/04.components/02.solution.raw",{"_20":119,"_22":120,"_24":121},"04.03.problem","/myapp/workshop-content/exercises/04.components/03.problem.jsx","exercises/04.components/03.problem.jsx",{"_20":123,"_22":124,"_24":125},"04.03.solution","/myapp/workshop-content/exercises/04.components/03.solution.jsx","exercises/04.components/03.solution.jsx",{"_20":127,"_22":128,"_24":129},"04.04.problem","/myapp/workshop-content/exercises/04.components/04.problem.props","exercises/04.components/04.problem.props",{"_20":131,"_22":132,"_24":133},"04.04.solution","/myapp/workshop-content/exercises/04.components/04.solution.props","exercises/04.components/04.solution.props",{"_20":135,"_22":136,"_24":137},"05.01.problem","/myapp/workshop-content/exercises/05.typescript/01.problem.props","exercises/05.typescript/01.problem.props",{"_20":139,"_22":140,"_24":141},"05.01.solution","/myapp/workshop-content/exercises/05.typescript/01.solution.props","exercises/05.typescript/01.solution.props",{"_20":143,"_22":144,"_24":145},"05.02.problem","/myapp/workshop-content/exercises/05.typescript/02.problem.narrow","exercises/05.typescript/02.problem.narrow",{"_20":147,"_22":148,"_24":149},"05.02.solution","/myapp/workshop-content/exercises/05.typescript/02.solution.narrow","exercises/05.typescript/02.solution.narrow",{"_20":151,"_22":152,"_24":153},"05.03.problem","/myapp/workshop-content/exercises/05.typescript/03.problem.derive","exercises/05.typescript/03.problem.derive",{"_20":155,"_22":156,"_24":157},"05.03.solution","/myapp/workshop-content/exercises/05.typescript/03.solution.derive","exercises/05.typescript/03.solution.derive",{"_20":159,"_22":160,"_24":161},"05.04.problem","/myapp/workshop-content/exercises/05.typescript/04.problem.default-props","exercises/05.typescript/04.problem.default-props",{"_20":163,"_22":164,"_24":165},"05.04.solution","/myapp/workshop-content/exercises/05.typescript/04.solution.default-props","exercises/05.typescript/04.solution.default-props",{"_20":167,"_22":168,"_24":169},"05.05.problem","/myapp/workshop-content/exercises/05.typescript/05.problem.function-types","exercises/05.typescript/05.problem.function-types",{"_20":171,"_22":172,"_24":173},"05.05.solution","/myapp/workshop-content/exercises/05.typescript/05.solution.function-types","exercises/05.typescript/05.solution.function-types",{"_20":175,"_22":176,"_24":177},"05.06.problem","/myapp/workshop-content/exercises/05.typescript/06.problem.satisfies","exercises/05.typescript/06.problem.satisfies",{"_20":179,"_22":180,"_24":181},"05.06.solution","/myapp/workshop-content/exercises/05.typescript/06.solution.satisfies","exercises/05.typescript/06.solution.satisfies",{"_20":183,"_22":184,"_24":185},"06.01.problem","/myapp/workshop-content/exercises/06.styling/01.problem.style","exercises/06.styling/01.problem.style",{"_20":187,"_22":188,"_24":189},"06.01.solution","/myapp/workshop-content/exercises/06.styling/01.solution.style","exercises/06.styling/01.solution.style",{"_20":191,"_22":192,"_24":193},"06.02.problem","/myapp/workshop-content/exercises/06.styling/02.problem.component","exercises/06.styling/02.problem.component",{"_20":195,"_22":196,"_24":197},"06.02.solution","/myapp/workshop-content/exercises/06.styling/02.solution.component","exercises/06.styling/02.solution.component",{"_20":199,"_22":200,"_24":201},"06.03.problem","/myapp/workshop-content/exercises/06.styling/03.problem.size-prop","exercises/06.styling/03.problem.size-prop",{"_20":203,"_22":204,"_24":205},"06.03.solution","/myapp/workshop-content/exercises/06.styling/03.solution.size-prop","exercises/06.styling/03.solution.size-prop",{"_20":207,"_22":208,"_24":209},"07.01.problem","/myapp/workshop-content/exercises/07.forms/01.problem.form","exercises/07.forms/01.problem.form",{"_20":211,"_22":212,"_24":213},"07.01.solution","/myapp/workshop-content/exercises/07.forms/01.solution.form","exercises/07.forms/01.solution.form",{"_20":215,"_22":216,"_24":217},"07.02.problem","/myapp/workshop-content/exercises/07.forms/02.problem.action","exercises/07.forms/02.problem.action",{"_20":219,"_22":220,"_24":221},"07.02.solution","/myapp/workshop-content/exercises/07.forms/02.solution.action","exercises/07.forms/02.solution.action",{"_20":223,"_22":224,"_24":225},"07.03.problem","/myapp/workshop-content/exercises/07.forms/03.problem.types","exercises/07.forms/03.problem.types",{"_20":227,"_22":228,"_24":229},"07.03.solution","/myapp/workshop-content/exercises/07.forms/03.solution.types","exercises/07.forms/03.solution.types",{"_20":231,"_22":232,"_24":233},"07.04.problem","/myapp/workshop-content/exercises/07.forms/04.problem.submit","exercises/07.forms/04.problem.submit",{"_20":235,"_22":236,"_24":237},"07.04.solution","/myapp/workshop-content/exercises/07.forms/04.solution.submit","exercises/07.forms/04.solution.submit",{"_20":239,"_22":240,"_24":241},"07.05.problem","/myapp/workshop-content/exercises/07.forms/05.problem.action","exercises/07.forms/05.problem.action",{"_20":243,"_22":244,"_24":245},"07.05.solution","/myapp/workshop-content/exercises/07.forms/05.solution.action","exercises/07.forms/05.solution.action",{"_20":247,"_22":248,"_24":249},"08.01.problem","/myapp/workshop-content/exercises/08.inputs/01.problem.checkbox","exercises/08.inputs/01.problem.checkbox",{"_20":251,"_22":252,"_24":253},"08.01.solution","/myapp/workshop-content/exercises/08.inputs/01.solution.checkbox","exercises/08.inputs/01.solution.checkbox",{"_20":255,"_22":256,"_24":257},"08.02.problem","/myapp/workshop-content/exercises/08.inputs/02.problem.select","exercises/08.inputs/02.problem.select",{"_20":259,"_22":260,"_24":261},"08.02.solution","/myapp/workshop-content/exercises/08.inputs/02.solution.select","exercises/08.inputs/02.solution.select",{"_20":263,"_22":264,"_24":265},"08.03.problem","/myapp/workshop-content/exercises/08.inputs/03.problem.radio","exercises/08.inputs/03.problem.radio",{"_20":267,"_22":268,"_24":269},"08.03.solution","/myapp/workshop-content/exercises/08.inputs/03.solution.radio","exercises/08.inputs/03.solution.radio",{"_20":271,"_22":272,"_24":273},"08.04.problem","/myapp/workshop-content/exercises/08.inputs/04.problem.hidden","exercises/08.inputs/04.problem.hidden",{"_20":275,"_22":276,"_24":277},"08.04.solution","/myapp/workshop-content/exercises/08.inputs/04.solution.hidden","exercises/08.inputs/04.solution.hidden",{"_20":279,"_22":280,"_24":281},"08.05.problem","/myapp/workshop-content/exercises/08.inputs/05.problem.default-value","exercises/08.inputs/05.problem.default-value",{"_20":283,"_22":284,"_24":285},"08.05.solution","/myapp/workshop-content/exercises/08.inputs/05.solution.default-value","exercises/08.inputs/05.solution.default-value",{"_20":287,"_22":288,"_24":289},"09.01.problem","/myapp/workshop-content/exercises/09.errors/01.problem.composition","exercises/09.errors/01.problem.composition",{"_20":291,"_22":292,"_24":293},"09.01.solution","/myapp/workshop-content/exercises/09.errors/01.solution.composition","exercises/09.errors/01.solution.composition",{"_20":295,"_22":296,"_24":297},"09.02.problem","/myapp/workshop-content/exercises/09.errors/02.problem.show-boundary","exercises/09.errors/02.problem.show-boundary",{"_20":299,"_22":300,"_24":301},"09.02.solution","/myapp/workshop-content/exercises/09.errors/02.solution.show-boundary","exercises/09.errors/02.solution.show-boundary",{"_20":303,"_22":304,"_24":305},"09.03.problem","/myapp/workshop-content/exercises/09.errors/03.problem.reset","exercises/09.errors/03.problem.reset",{"_20":307,"_22":308,"_24":309},"09.03.solution","/myapp/workshop-content/exercises/09.errors/03.solution.reset","exercises/09.errors/03.solution.reset",{"_20":311,"_22":312,"_24":313},"10.01.problem","/myapp/workshop-content/exercises/10.arrays/01.problem.key-prop","exercises/10.arrays/01.problem.key-prop",{"_20":315,"_22":316,"_24":317},"10.01.solution","/myapp/workshop-content/exercises/10.arrays/01.solution.key-prop","exercises/10.arrays/01.solution.key-prop",{"_20":319,"_22":320,"_24":321},"10.02.problem","/myapp/workshop-content/exercises/10.arrays/02.problem.focus-state","exercises/10.arrays/02.problem.focus-state",{"_20":323,"_22":324,"_24":325},"10.02.solution","/myapp/workshop-content/exercises/10.arrays/02.solution.focus-state","exercises/10.arrays/02.solution.focus-state",{"_20":327,"_22":328,"_24":329},"10.03.problem","/myapp/workshop-content/exercises/10.arrays/03.problem.key-reset","exercises/10.arrays/03.problem.key-reset",{"_20":331,"_22":332,"_24":333},"10.03.solution","/myapp/workshop-content/exercises/10.arrays/03.solution.key-reset","exercises/10.arrays/03.solution.key-reset","repoUpdates",{"_336":16},"updatesAvailable","unmutedNotifications",[],"exerciseChanges","workshopConfig",{"_342":343,"_344":345,"_346":347,"_353":354,"_371":372,"_374":375,"_376":377,"_378":379,"_382":383,"_388":389,"_392":393,"_394":395,"_396":397},"title","React Fundamentals ⚛","subtitle","Learn the foundational concepts necessary for building React applications and libraries","instructor",{"_20":348,"_349":350,"_351":352},"Kent C. Dodds","avatar","/images/instructor.png","𝕏","kentcdodds","product",{"_355":356,"_357":358,"_359":360,"_361":362,"_363":364,"_365":366,"_367":368},"host","www.epicreact.dev","displayName","EpicReact.dev","displayNameShort","Epic React","logo","/logo.svg","slug","react-fundamentals","discordChannelId","1285244676286189569","discordTags",[369,370],"1285246046498328627","1285245484432228375","onboardingVideo",[373],"https://www.epicweb.dev/tips/get-started-with-the-epic-workshop-app-for-react","githubRepo","https://github.com/epicweb-dev/react-fundamentals","githubRoot","https://github.com/epicweb-dev/react-fundamentals/tree/main","stackBlitzConfig",{"_380":381},"view","editor","forms",{"_384":385,"_386":387},"workshop","https://docs.google.com/forms/d/e/1FAIpQLSdRmj9p8-5zyoqRzxp3UpqSbC3aFkweXvvJIKes0a5s894gzg/viewform?hl=en&embedded=true&entry.2123647600={workshopTitle}","exercise","https://docs.google.com/forms/d/e/1FAIpQLSf3o9xyjQepTlOTH5Z7ZwkeSTdXh6YWI_RGc9KiyD3oUN0p6w/viewform?hl=en&embedded=true&entry.1836176234={workshopTitle}&entry.428900931={exerciseTitle}","testTab",{"_390":391},"enabled",true,"initialRoute","/","notifications",[],"sidecarProcesses",{},"workshopTitle","workshopSubtitle","ENV",{"_402":403,"_404":405,"_406":407,"_408":375,"_409":377,"_410":391,"_411":412,"_413":414,"_415":416,"_417":391,"_418":419,"_420":421},"MODE","production","EPICSHOP_CONTEXT_CWD","/myapp/workshop-content","EPICSHOP_WORKSHOP_INSTANCE_ID","4e1570b81d1baf3d16bd3a08ece570cb","EPICSHOP_GITHUB_REPO","EPICSHOP_GITHUB_ROOT","EPICSHOP_DEPLOYED","EPICSHOP_APP_VERSION","6.40.0","EPICSHOP_PARENT_PORT","3742","EPICSHOP_PARENT_TOKEN","5bb8c2d080e5037a0ff33608f969a45f5a1b436fb544070e42a07daf75241e8f","EPICSHOP_IS_PUBLISHED","SENTRY_DSN","https://cd51fbf4ca0834f7b3529a478a8ece4c@o913766.ingest.us.sentry.io/4509630082252800","SENTRY_PROJECT_ID","4509630082252800","requestInfo",{"_424":425,"_426":427,"_428":429,"_430":431,"_432":431,"_433":434,"_441":442,"_443":444,"_445":393,"_446":391},"protocol","http:","hostname","fundamentals.epicreact.dev","port","","origin","http://fundamentals.epicreact.dev","domain","hints",{"_435":436,"_437":438,"_439":440},"theme","light","timeZone","UTC","reducedMotion","no-preference","path","/exercise/05/finished","session",{"_435":-5},"separator","online","toast","confettiId","presence",{"_451":452},"users",[453,470,479,489,498,505,513,522,529,535,542],{"_7":454,"_455":391,"_456":457,"_458":459,"_20":460,"_461":462},"16a4bbe7-a163-4240-933a-720e952c210e","hasAccess","imageUrlSmall","https://www.gravatar.com/avatar/9a8329ced26e545382c01e8d24fb0b7d?size=64&default=identicon","imageUrlLarge","https://www.gravatar.com/avatar/9a8329ced26e545382c01e8d24fb0b7d?size=512&default=identicon","Dimiter Radonov","location",{"_398":463,"_430":464,"_386":465},"React Server Components 🤹","http://localhost:5639",{"_9":466,"_467":468,"_469":468},"problem","exerciseNumber",1,"stepNumber",{"_7":471,"_455":391,"_456":472,"_458":473,"_20":474,"_461":475},"1569790b-c1b2-4871-949f-fcb53ef12b5a","https://www.gravatar.com/avatar/ac5f77198a2eb7fb5839189e12c35a45?size=64&default=identicon","https://www.gravatar.com/avatar/ac5f77198a2eb7fb5839189e12c35a45?size=512&default=identicon","Gábor",{"_398":476,"_430":464,"_386":477},"MCP Auth 🔐",{"_9":466,"_467":468,"_469":478},2,{"_7":480,"_455":391,"_456":481,"_458":482,"_20":483,"_461":484},"4fa240de-adbd-4295-9fb6-85d28f2c7d31","https://avatars.githubusercontent.com/u/77246?v=4&size=64","https://avatars.githubusercontent.com/u/77246?v=4&size=512","Guilherme Carvalho",{"_398":485,"_430":464,"_386":486},"MCP UI 🪟",{"_9":487,"_467":488,"_469":478},"solution",5,{"_7":490,"_455":16,"_456":491,"_458":492,"_20":493,"_461":494},"613a2a56-e4a1-494b-965a-a6cb39723225","https://cdn.discordapp.com/embed/avatars/0.png?size=64","https://cdn.discordapp.com/embed/avatars/0.png?size=512","hsinramen",{"_398":495,"_430":464,"_386":496},"Full Stack Testing 🧪",{"_9":466,"_467":468,"_469":497},4,{"_7":499,"_455":391,"_456":500,"_458":501,"_20":502,"_461":503},"0ee33665-8b1e-464a-8fef-ae3b6bc45407","https://avatars.githubusercontent.com/u/91997819?v=4&size=64","https://avatars.githubusercontent.com/u/91997819?v=4&size=512","mariopirrocco",{"_398":343,"_430":464,"_386":504},{"_467":488},{"_7":506,"_455":391,"_456":507,"_458":508,"_20":509,"_461":510},"afcb5fbb-9f5e-4dcc-a201-f6b2b7c22aaf","https://www.gravatar.com/avatar/3906494abe29e7418425dbce15264502?size=64&default=identicon","https://www.gravatar.com/avatar/3906494abe29e7418425dbce15264502?size=512&default=identicon","Yuri",{"_398":511,"_430":464,"_386":512},"MCP Fundamentals 🧱",{"_467":497},{"_7":514,"_455":391,"_456":515,"_458":516,"_20":517,"_461":518},"721f73bc-5214-49a2-a07d-502c5cd203b6","https://cdn.discordapp.com/avatars/298546853400674304/2912c8399f3f56f08a638a118dc35825.png?size=64","https://cdn.discordapp.com/avatars/298546853400674304/2912c8399f3f56f08a638a118dc35825.png?size=512","Stephen O'Neill",{"_398":519,"_430":464,"_386":520},"Advanced React Patterns 🤯",{"_9":466,"_467":497,"_469":521},3,{"_7":523,"_455":391,"_456":524,"_458":525,"_20":526,"_461":527},"4d9ec2ca-1487-419c-8624-93f8f39f6a54","https://cdn.discordapp.com/avatars/653960485586206741/ae3df34131534748b3d0474a649078d8.png?size=64","https://cdn.discordapp.com/avatars/653960485586206741/ae3df34131534748b3d0474a649078d8.png?size=512","Leandro Andrade Almeida",{"_398":343,"_430":464,"_386":528},{"_467":488},{"_7":530,"_455":391,"_456":531,"_458":532,"_20":-5,"_461":533},"f427593a-058d-464f-9e88-e167575d8657","https://www.gravatar.com/avatar/75d0ee7ca70436becfb4e90a64c5b8db?size=64&default=identicon","https://www.gravatar.com/avatar/75d0ee7ca70436becfb4e90a64c5b8db?size=512&default=identicon",{"_398":343,"_430":464,"_386":534},{"_467":478},{"_7":536,"_455":391,"_456":537,"_458":538,"_20":-5,"_461":539},"083b64ba-8faf-44e4-90a9-91f91ca0e9dc","https://www.gravatar.com/avatar/4eecacc59b971377a045c473a20327a4?size=64&default=identicon","https://www.gravatar.com/avatar/4eecacc59b971377a045c473a20327a4?size=512&default=identicon",{"_398":343,"_430":464,"_386":540},{"_9":466,"_467":541,"_469":521},9,{"_7":543,"_461":544},"gf6q0hkwghmrxy02z9vb9z8f",{"_398":343,"_430":431,"_386":545},{"_467":488,"_469":-5,"_9":-5},"routes/_app+/_layout",{"_398":343,"_548":549,"_838":839,"_841":16},"exercises",[550,569,592,627,656,697,719,755,791,814],{"_467":468,"_342":551,"_552":553,"_557":558,"_561":562},"Hello World in JS","solutions",[554,555],{"_469":468,"_342":551,"_20":27},{"_469":478,"_342":556,"_20":35},"Generate the Root Node","problems",[559,560],{"_469":468,"_342":551,"_20":21},{"_469":478,"_342":556,"_20":31},"steps",[563,566],{"_469":468,"_342":551,"_20":21,"_466":564,"_487":565},{"_20":21,"_342":551},{"_20":27,"_342":551},{"_469":478,"_342":556,"_20":31,"_466":567,"_487":568},{"_20":31,"_342":556},{"_20":35,"_342":556},{"_467":478,"_342":570,"_552":571,"_557":578,"_561":582},"Raw React APIs",[572,574,576],{"_469":468,"_342":573,"_20":43},"Create React Elements",{"_469":478,"_342":575,"_20":51},"Nesting Elements",{"_469":521,"_342":577,"_20":59},"Deep Nesting Elements",[579,580,581],{"_469":468,"_342":573,"_20":39},{"_469":478,"_342":575,"_20":47},{"_469":521,"_342":577,"_20":55},[583,586,589],{"_469":468,"_342":573,"_20":39,"_466":584,"_487":585},{"_20":39,"_342":573},{"_20":43,"_342":573},{"_469":478,"_342":575,"_20":47,"_466":587,"_487":588},{"_20":47,"_342":575},{"_20":51,"_342":575},{"_469":521,"_342":577,"_20":55,"_466":590,"_487":591},{"_20":55,"_342":577},{"_20":59,"_342":577},{"_467":521,"_342":593,"_552":594,"_557":605,"_561":611},"Using JSX",[595,597,599,601,603],{"_469":468,"_342":596,"_20":67},"Compiling JSX",{"_469":478,"_342":598,"_20":75},"Interpolation",{"_469":521,"_342":600,"_20":83},"Spread props",{"_469":497,"_342":602,"_20":91},"Nesting JSX",{"_469":488,"_342":604,"_20":99},"Fragments",[606,607,608,609,610],{"_469":468,"_342":596,"_20":63},{"_469":478,"_342":598,"_20":71},{"_469":521,"_342":600,"_20":79},{"_469":497,"_342":602,"_20":87},{"_469":488,"_342":604,"_20":95},[612,615,618,621,624],{"_469":468,"_342":596,"_20":63,"_466":613,"_487":614},{"_20":63,"_342":596},{"_20":67,"_342":596},{"_469":478,"_342":598,"_20":71,"_466":616,"_487":617},{"_20":71,"_342":598},{"_20":75,"_342":598},{"_469":521,"_342":600,"_20":79,"_466":619,"_487":620},{"_20":79,"_342":600},{"_20":83,"_342":600},{"_469":497,"_342":602,"_20":87,"_466":622,"_487":623},{"_20":87,"_342":602},{"_20":91,"_342":602},{"_469":488,"_342":604,"_20":95,"_466":625,"_487":626},{"_20":95,"_342":604},{"_20":99,"_342":604},{"_467":497,"_342":628,"_552":629,"_557":638,"_561":643},"Custom Components",[630,632,634,636],{"_469":468,"_342":631,"_20":107},"Simple Function",{"_469":478,"_342":633,"_20":115},"Raw API",{"_469":521,"_342":635,"_20":123},"JSX Components",{"_469":497,"_342":637,"_20":131},"Props",[639,640,641,642],{"_469":468,"_342":631,"_20":103},{"_469":478,"_342":633,"_20":111},{"_469":521,"_342":635,"_20":119},{"_469":497,"_342":637,"_20":127},[644,647,650,653],{"_469":468,"_342":631,"_20":103,"_466":645,"_487":646},{"_20":103,"_342":631},{"_20":107,"_342":631},{"_469":478,"_342":633,"_20":111,"_466":648,"_487":649},{"_20":111,"_342":633},{"_20":115,"_342":633},{"_469":521,"_342":635,"_20":119,"_466":651,"_487":652},{"_20":119,"_342":635},{"_20":123,"_342":635},{"_469":497,"_342":637,"_20":127,"_466":654,"_487":655},{"_20":127,"_342":637},{"_20":131,"_342":637},{"_467":488,"_342":657,"_552":658,"_557":671,"_561":678},"TypeScript",[659,660,662,664,666,668],{"_469":468,"_342":637,"_20":139},{"_469":478,"_342":661,"_20":147},"Narrow Types",{"_469":521,"_342":663,"_20":155},"Derive Types",{"_469":497,"_342":665,"_20":163},"Default Props",{"_469":488,"_342":667,"_20":171},"Reduce Duplication",{"_469":669,"_342":670,"_20":179},6,"Satisfies",[672,673,674,675,676,677],{"_469":468,"_342":637,"_20":135},{"_469":478,"_342":661,"_20":143},{"_469":521,"_342":663,"_20":151},{"_469":497,"_342":665,"_20":159},{"_469":488,"_342":667,"_20":167},{"_469":669,"_342":670,"_20":175},[679,682,685,688,691,694],{"_469":468,"_342":637,"_20":135,"_466":680,"_487":681},{"_20":135,"_342":637},{"_20":139,"_342":637},{"_469":478,"_342":661,"_20":143,"_466":683,"_487":684},{"_20":143,"_342":661},{"_20":147,"_342":661},{"_469":521,"_342":663,"_20":151,"_466":686,"_487":687},{"_20":151,"_342":663},{"_20":155,"_342":663},{"_469":497,"_342":665,"_20":159,"_466":689,"_487":690},{"_20":159,"_342":665},{"_20":163,"_342":665},{"_469":488,"_342":667,"_20":167,"_466":692,"_487":693},{"_20":167,"_342":667},{"_20":171,"_342":667},{"_469":669,"_342":670,"_20":175,"_466":695,"_487":696},{"_20":175,"_342":670},{"_20":179,"_342":670},{"_467":669,"_342":698,"_552":699,"_557":705,"_561":709},"Styling",[700,701,703],{"_469":468,"_342":698,"_20":187},{"_469":478,"_342":702,"_20":195},"Custom Component",{"_469":521,"_342":704,"_20":203},"Size Prop",[706,707,708],{"_469":468,"_342":698,"_20":183},{"_469":478,"_342":702,"_20":191},{"_469":521,"_342":704,"_20":199},[710,713,716],{"_469":468,"_342":698,"_20":183,"_466":711,"_487":712},{"_20":183,"_342":698},{"_20":187,"_342":698},{"_469":478,"_342":702,"_20":191,"_466":714,"_487":715},{"_20":191,"_342":702},{"_20":195,"_342":702},{"_469":521,"_342":704,"_20":199,"_466":717,"_487":718},{"_20":199,"_342":704},{"_20":203,"_342":704},{"_467":720,"_342":721,"_552":722,"_557":733,"_561":739},7,"Forms",[723,725,727,729,731],{"_469":468,"_342":724,"_20":211},"Form",{"_469":478,"_342":726,"_20":219},"Form Action",{"_469":521,"_342":728,"_20":227},"Input Types",{"_469":497,"_342":730,"_20":235},"Submission",{"_469":488,"_342":732,"_20":243},"Form Actions",[734,735,736,737,738],{"_469":468,"_342":724,"_20":207},{"_469":478,"_342":726,"_20":215},{"_469":521,"_342":728,"_20":223},{"_469":497,"_342":730,"_20":231},{"_469":488,"_342":732,"_20":239},[740,743,746,749,752],{"_469":468,"_342":724,"_20":207,"_466":741,"_487":742},{"_20":207,"_342":724},{"_20":211,"_342":724},{"_469":478,"_342":726,"_20":215,"_466":744,"_487":745},{"_20":215,"_342":726},{"_20":219,"_342":726},{"_469":521,"_342":728,"_20":223,"_466":747,"_487":748},{"_20":223,"_342":728},{"_20":227,"_342":728},{"_469":497,"_342":730,"_20":231,"_466":750,"_487":751},{"_20":231,"_342":730},{"_20":235,"_342":730},{"_469":488,"_342":732,"_20":239,"_466":753,"_487":754},{"_20":239,"_342":732},{"_20":243,"_342":732},{"_467":756,"_342":757,"_552":758,"_557":769,"_561":775},8,"Inputs",[759,761,763,765,767],{"_469":468,"_342":760,"_20":251},"Checkbox",{"_469":478,"_342":762,"_20":259},"Select",{"_469":521,"_342":764,"_20":267},"Radios",{"_469":497,"_342":766,"_20":275},"Hidden Inputs",{"_469":488,"_342":768,"_20":283},"Default Value",[770,771,772,773,774],{"_469":468,"_342":760,"_20":247},{"_469":478,"_342":762,"_20":255},{"_469":521,"_342":764,"_20":263},{"_469":497,"_342":766,"_20":271},{"_469":488,"_342":768,"_20":279},[776,779,782,785,788],{"_469":468,"_342":760,"_20":247,"_466":777,"_487":778},{"_20":247,"_342":760},{"_20":251,"_342":760},{"_469":478,"_342":762,"_20":255,"_466":780,"_487":781},{"_20":255,"_342":762},{"_20":259,"_342":762},{"_469":521,"_342":764,"_20":263,"_466":783,"_487":784},{"_20":263,"_342":764},{"_20":267,"_342":764},{"_469":497,"_342":766,"_20":271,"_466":786,"_487":787},{"_20":271,"_342":766},{"_20":275,"_342":766},{"_469":488,"_342":768,"_20":279,"_466":789,"_487":790},{"_20":279,"_342":768},{"_20":283,"_342":768},{"_467":541,"_342":792,"_552":793,"_557":800,"_561":804},"Error Boundaries",[794,796,798],{"_469":468,"_342":795,"_20":291},"Composition",{"_469":478,"_342":797,"_20":299},"Other Errors",{"_469":521,"_342":799,"_20":307},"Reset",[801,802,803],{"_469":468,"_342":795,"_20":287},{"_469":478,"_342":797,"_20":295},{"_469":521,"_342":799,"_20":303},[805,808,811],{"_469":468,"_342":795,"_20":287,"_466":806,"_487":807},{"_20":287,"_342":795},{"_20":291,"_342":795},{"_469":478,"_342":797,"_20":295,"_466":809,"_487":810},{"_20":295,"_342":797},{"_20":299,"_342":797},{"_469":521,"_342":799,"_20":303,"_466":812,"_487":813},{"_20":303,"_342":799},{"_20":307,"_342":799},{"_467":815,"_342":816,"_552":817,"_557":824,"_561":828},10,"Rendering Arrays",[818,820,822],{"_469":468,"_342":819,"_20":315},"Key prop",{"_469":478,"_342":821,"_20":323},"Focus State",{"_469":521,"_342":823,"_20":331},"Key Reset",[825,826,827],{"_469":468,"_342":819,"_20":311},{"_469":478,"_342":821,"_20":319},{"_469":521,"_342":823,"_20":327},[829,832,835],{"_469":468,"_342":819,"_20":311,"_466":830,"_487":831},{"_20":311,"_342":819},{"_20":315,"_342":819},{"_469":478,"_342":821,"_20":319,"_466":833,"_487":834},{"_20":319,"_342":821},{"_20":323,"_342":821},{"_469":521,"_342":823,"_20":327,"_466":836,"_487":837},{"_20":327,"_342":823},{"_20":331,"_342":823},"playground",{"_840":-5,"_467":-2,"_469":-2,"_9":-7},"appName","isMenuOpened","routes/_app+/exercise+/$exerciseNumber_.finished",{"_844":845,"_398":343,"_386":846,"_1071":1072,"_1073":1074,"_1075":1076,"_1080":1081,"_1086":1087},"articleId","workshop-react-fundamentals-5-finished",{"_22":847,"_467":488,"_848":849,"_342":657,"_850":851,"_852":853,"_854":855,"_857":858,"_561":860,"_557":1009,"_552":1040},"/myapp/workshop-content/exercises/05.typescript","dirName","05.typescript","instructionsCode","var Component=(()=>{var p=Object.create;var r=Object.defineProperty;var b=Object.getOwnPropertyDescriptor;var y=Object.getOwnPropertyNames;var m=Object.getPrototypeOf,u=Object.prototype.hasOwnProperty;var v=(n,e)=>()=>(e||n((e={exports:{}}).exports,e),e.exports),k=(n,e)=>{for(var l in e)r(n,l,{get:e[l],enumerable:!0})},o=(n,e,l,c)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let s of y(e))!u.call(n,s)&&s!==l&&r(n,s,{get:()=>e[s],enumerable:!(c=b(e,s))||c.enumerable});return n};var g=(n,e,l)=>(l=n!=null?p(m(n)):{},o(e||!n||!n.__esModule?r(l,\"default\",{value:n,enumerable:!0}):l,n)),f=n=>o(r({},\"__esModule\",{value:!0}),n);var i=v((D,t)=>{t.exports=_jsx_runtime});var E={};k(E,{default:()=>h,frontmatter:()=>N});var a=g(i()),N=void 0;function d(n){let e={a:\"a\",blockquote:\"blockquote\",code:\"code\",h1:\"h1\",li:\"li\",ol:\"ol\",p:\"p\",pre:\"pre\",span:\"span\",...n.components},{EpicVideo:l}=e;return l||w(\"EpicVideo\",!0),(0,a.jsxs)(a.Fragment,{children:[(0,a.jsx)(e.h1,{children:\"TypeScript\"}),`\n`,(0,a.jsx)(l,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/intro-to-typescript\"}),`\n`,(0,a.jsx)(e.p,{children:`TypeScript is an enormously valuable team productivity, code quality, and\nconfidence tool that I strongly recommend you use to build any React application\nyou plan making maintainable. As you're working with TypeScript and getting\nangry at all the red squiggles it puts in your code, keep this in mind:`}),`\n`,(0,a.jsxs)(e.blockquote,{children:[`\n`,(0,a.jsxs)(e.p,{children:[`TypeScript is not making your life terrible. It's just showing you how\nterrible your life already is. \\u2013 `,(0,a.jsx)(e.a,{href:\"https://twitter.com/kentcdodds/status/1763606063394496633\",children:\"Kent C. Dodds\"})]}),`\n`]}),`\n`,(0,a.jsxs)(e.p,{children:[`You can think of TypeScript as that\n`,(0,a.jsx)(e.a,{href:\"https://twitter.com/kentcdodds/status/1715562350835855396\",children:\"brutally honest friend\"}),`\nwho isn't afraid to tell you about the spinach in your teeth. It's not the\nfriend's fault that you've got spinach in your teeth. It's your fault. You\nshould be thanking TypeScript, not cursing it.`]}),`\n`,(0,a.jsxs)(e.p,{children:[`Remember, in exercise 4 we learned\n`,(0,a.jsx)(e.a,{href:\"https://twitter.com/kentcdodds/status/1763606427028136131\",children:\"what a React component\"}),`\nis:`]}),`\n`,(0,a.jsxs)(e.blockquote,{children:[`\n`,(0,a.jsx)(e.p,{children:`Components are functions which accept an object called \"props\" and return\nsomething that is renderable`}),`\n`]}),`\n`,(0,a.jsx)(e.p,{children:`Because of this, they don't require any special considerations when applying\nTypeScript type annotations to them. You treat React component functions the\nsame way you treat regular functions. Because of this, the major battle for\nfolks using TypeScript with React is:`}),`\n`,(0,a.jsxs)(e.ol,{children:[`\n`,(0,a.jsx)(e.li,{children:\"Improving their TypeScript skills\"}),`\n`,(0,a.jsx)(e.li,{children:\"Learning the React-specific types available\"}),`\n`]}),`\n`,(0,a.jsxs)(e.p,{children:[`\\u{1F4DC} I advise having the\n`,(0,a.jsx)(e.a,{href:\"https://github.com/typescript-cheatsheets/react\",children:\"React+TypeScript Cheatsheets\"}),`\nrepo open as a reference while you're getting used to using TypeScript and\nReact. Another terrific resource is\n`,(0,a.jsx)(e.a,{href:\"https://www.totaltypescript.com/\",children:\"Total TypeScript\"}),` which has a lot of great\nfree resources which go much deeper than we do in this exercise.`]}),`\n`,(0,a.jsx)(e.p,{children:\"With that said, here's a quick intro to adding type annotations to functions:\"}),`\n`,(0,a.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,a.jsxs)(e.code,{children:[(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// here's a regular JS function that accepts a user\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// which might have a name property\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"getName\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"name\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"??\"}),\" \",\"'\",(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Unknown\"}),\"'\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"5\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"6\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"7\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// here's how you'd type that user object to say it has an optional name property:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"8\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"name\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"?:\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0C)\"},children:\"string\"}),\" }\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"9\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"10\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// and here's how you'd tell TypeScript that the user parameter is a User object\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"11\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"getName\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"12\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"name\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"??\"}),\" \",\"'\",(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Unknown\"}),\"'\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"13\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"14\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"15\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// and if you'd like to, you can specify the return type explicitly as well\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"16\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// (though it is inferred):\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"17\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"getName\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),\")\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0C)\"},children:\"string\"}),\" {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"18\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"name\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"??\"}),\" \",\"'\",(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Unknown\"}),\"'\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"19\",children:[\"}\",`\n`]})]})}),`\n`,(0,a.jsxs)(e.p,{children:[`\\u{1F4DC} Learn more about the syntax for functions in TypeScript here:\n`,(0,a.jsx)(e.a,{href:\"https://kentcdodds.com/blog/typescript-function-syntaxes\",children:\"TypeScript Function Syntaxes\"})]}),`\n`,(0,a.jsx)(e.p,{children:`Let's look at a quick example of adding TypeScript to a simple (and familiar)\nReact component:`}),`\n`,(0,a.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,a.jsxs)(e.code,{children:[(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"5\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// We could say:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"6\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0C)\"},children:\"string\"}),\" }\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"7\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"8\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"9\",children:[\"}\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"10\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// that would allow: Hello World\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"11\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// but not: Hello World\"}),`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"12\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"13\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// The React types have a ReactNode, which is the recommended choice for the children prop:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"14\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"React\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ReactNode\"}),\" }\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"15\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"16\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"17\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"18\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"19\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// keep in mind that you don't *have* to give your props a name.\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"20\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// You can inline them as well. This works just the same as above:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"21\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"(\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"React\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ReactNode\"}),\" }) {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"22\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"props\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"23\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"24\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"25\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// and you can destructure as well (this is what I do most of the time):\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"26\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"({ \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),\" }\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"React\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ReactNode\"}),\" }) {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"27\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"28\",children:[\"}\",`\n`]}),(0,a.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"29\",children:`\n`}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"30\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// mix-and-match:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"31\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"React\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ReactNode\"}),\" }\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"32\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"Message\"}),\"({ \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),\" }\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"MessageProps\"}),\") {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"33\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" <\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"className\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"message\"}),'\"',\">\",(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"children\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\"\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"34\",children:[\"}\",`\n`]})]})}),`\n`,(0,a.jsxs)(e.p,{children:[`\\u{1F4DC} Learn more about typing React components here:\n`,(0,a.jsx)(e.a,{href:\"https://kentcdodds.com/blog/how-to-write-a-react-component-in-typescript\",children:\"How to write a React Component in TypeScript\"})]}),`\n`,(0,a.jsx)(e.p,{children:`\\u{1F989} It's great to have your code type checked, but not at the expense of\nprogressing and learning. If you get totally stuck on something, then I suggest\nyou tell TypeScript to quiet down and come back to it later when you're more\nexperienced or want to focus on it. You can do this like so:`}),`\n`,(0,a.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"typescript\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,a.jsxs)(e.code,{children:[(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// @ts-expect-error TypeScript is complaining about this next line.\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// Something about magic not existing.\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// I don't know how to fix this right now and AI Assistants were unhelpful...\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// Come back later.\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"5\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"make\"}),\".\",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"magic\"}),\"()\",`\n`]})]})}),`\n`,(0,a.jsx)(e.p,{children:`Don't worry if you struggle with TypeScript at first, the more you use it, the\nbetter you'll get at it, just like anything else.`}),`\n`,(0,a.jsx)(\"callout-info\",{children:(0,a.jsxs)(e.p,{children:[\"Note: We're moving from the \",(0,a.jsx)(e.code,{children:\"*.html\"}),\" files to \",(0,a.jsx)(e.code,{children:\"*.tsx\"}),` files. This is more\nreal-world and also your editor likely supports TypeScript better within\nTypeScript files rather than HTML files. From here on out, the `,(0,a.jsx)(e.code,{children:\"index.tsx\"}),`\nfile will be loaded onto the page automatically. We'll also get live reload of\nthe browser as we save changes which will be quite nice. The workshop app is a\nlittle magical, but you'll find `,(0,a.jsx)(e.code,{children:\"createRoot(rootElement).render(element)\"}),`\ncalls in each of the files, just like we were doing in the previous exercises.`]})})]})}function h(n={}){let{wrapper:e}=n.components||{};return e?(0,a.jsx)(e,{...n,children:(0,a.jsx)(d,{...n})}):d(n)}function w(n,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+n+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return f(E);})();\n;return Component;","finishedCode","var Component=(()=>{var m=Object.create;var i=Object.defineProperty;var f=Object.getOwnPropertyDescriptor;var h=Object.getOwnPropertyNames;var w=Object.getPrototypeOf,x=Object.prototype.hasOwnProperty;var l=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),y=(t,e)=>{for(var n in e)i(t,n,{get:e[n],enumerable:!0})},c=(t,e,n,s)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let o of h(e))!x.call(t,o)&&o!==n&&i(t,o,{get:()=>e[o],enumerable:!(s=f(e,o))||s.enumerable});return t};var _=(t,e,n)=>(n=t!=null?m(w(t)):{},c(e||!t||!t.__esModule?i(n,\"default\",{value:t,enumerable:!0}):n,t)),j=t=>c(i({},\"__esModule\",{value:!0}),t);var d=l((b,a)=>{a.exports=_jsx_runtime});var E={};y(E,{default:()=>u,frontmatter:()=>g});var r=_(d()),g=void 0;function p(t){let e={h1:\"h1\",p:\"p\",...t.components},{EpicVideo:n}=e;return n||k(\"EpicVideo\",!0),(0,r.jsxs)(r.Fragment,{children:[(0,r.jsx)(e.h1,{children:\"TypeScript\"}),`\n`,(0,r.jsx)(n,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/dad-joke-break-typescript\"}),`\n`,(0,r.jsx)(e.p,{children:`\\u{1F468}\\u200D\\u{1F4BC} Awesome work. TypeScript is a must in this industry and using it with React\nis fairly straightforward.`})]})}function u(t={}){let{wrapper:e}=t.components||{};return e?(0,r.jsx)(e,{...t,children:(0,r.jsx)(p,{...t})}):p(t)}function k(t,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+t+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return j(E);})();\n;return Component;","instructionsEpicVideoEmbeds",[856],"https://www.epicreact.dev/workshops/react-fundamentals/intro-to-typescript","finishedEpicVideoEmbeds",[859],"https://www.epicreact.dev/workshops/react-fundamentals/dad-joke-break-typescript",[861,894,917,940,963,986],{"_469":468,"_466":862,"_487":882},{"_20":135,"_342":637,"_848":863,"_22":136,"_24":137,"_850":864,"_865":866,"_868":869,"_876":877,"_879":880,"_467":488,"_469":468,"_9":466,"_881":139},"01.problem.props","var Component=(()=>{var l=Object.create;var r=Object.defineProperty;var u=Object.getOwnPropertyDescriptor;var m=Object.getOwnPropertyNames;var f=Object.getPrototypeOf,w=Object.prototype.hasOwnProperty;var g=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),y=(t,e)=>{for(var n in e)r(t,n,{get:e[n],enumerable:!0})},s=(t,e,n,c)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let i of m(e))!w.call(t,i)&&i!==n&&r(t,i,{get:()=>e[i],enumerable:!(c=u(e,i))||c.enumerable});return t};var x=(t,e,n)=>(n=t!=null?l(f(t)):{},s(e||!t||!t.__esModule?r(n,\"default\",{value:t,enumerable:!0}):n,t)),_=t=>s(r({},\"__esModule\",{value:!0}),t);var d=g((b,a)=>{a.exports=_jsx_runtime});var v={};y(v,{default:()=>h,frontmatter:()=>j});var o=x(d()),j=void 0;function p(t){let e={code:\"code\",h1:\"h1\",p:\"p\",...t.components},{EpicVideo:n}=e;return n||k(\"EpicVideo\",!0),(0,o.jsxs)(o.Fragment,{children:[(0,o.jsx)(e.h1,{children:\"Props\"}),`\n`,(0,o.jsx)(n,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/props-ts\"}),`\n`,(0,o.jsxs)(e.p,{children:[\"\\u{1F468}\\u200D\\u{1F4BC} Our developers are having a hard time using the \",(0,o.jsx)(e.code,{children:\"Calculator\"}),` component\nproperly, so I want you to add type annotations.`]}),`\n`,(0,o.jsx)(e.p,{children:`I'd also like you to meet Lily the Life Jacket! \\u{1F9BA} She's going to be hanging\naround with the rest of the crew to indicate wherever there's something that's\nTypeScript-specific you need to do and to give you TypeScript-specific tips.\nYou'll be working with Lily the Life Jacket a lot in this exercise.`}),`\n`,(0,o.jsx)(e.p,{children:\"Follow the emoji!\"})]})}function h(t={}){let{wrapper:e}=t.components||{};return e?(0,o.jsx)(e,{...t,children:(0,o.jsx)(p,{...t})}):p(t)}function k(t,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+t+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return _(v);})();\n;return Component;","epicVideoEmbeds",[867],"https://www.epicreact.dev/workshops/react-fundamentals/props-ts","test",{"_9":870,"_871":872,"_873":874},"browser","pathname","/app/05.01.problem/test/","testFiles",[875],"calculator.test.ts","dev",{"_9":870,"_871":878},"/app/05.01.problem/","stackBlitzUrl","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/01.problem.props?view=editor&title=Props+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx","solutionName",{"_20":139,"_342":637,"_848":883,"_22":140,"_24":141,"_850":884,"_865":885,"_868":887,"_876":890,"_879":892,"_467":488,"_469":468,"_9":487,"_893":-5},"01.solution.props","var Component=(()=>{var l=Object.create;var c=Object.defineProperty;var h=Object.getOwnPropertyDescriptor;var m=Object.getOwnPropertyNames;var f=Object.getPrototypeOf,w=Object.prototype.hasOwnProperty;var x=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),_=(t,e)=>{for(var o in e)c(t,o,{get:e[o],enumerable:!0})},i=(t,e,o,s)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let r of m(e))!w.call(t,r)&&r!==o&&c(t,r,{get:()=>e[r],enumerable:!(s=h(e,r))||s.enumerable});return t};var g=(t,e,o)=>(o=t!=null?l(f(t)):{},i(e||!t||!t.__esModule?c(o,\"default\",{value:t,enumerable:!0}):o,t)),j=t=>i(c({},\"__esModule\",{value:!0}),t);var a=x((b,p)=>{p.exports=_jsx_runtime});var E={};_(E,{default:()=>u,frontmatter:()=>y});var n=g(a()),y=void 0;function d(t){let e={code:\"code\",h1:\"h1\",p:\"p\",...t.components},{EpicVideo:o}=e;return o||k(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Props\"}),`\n`,(0,n.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/props-ts/solution\"}),`\n`,(0,n.jsxs)(e.p,{children:[`\\u{1F468}\\u200D\\u{1F4BC} Great work! Now we'll get some type safety when people are using the\n`,(0,n.jsx)(e.code,{children:\"Calculator\"}),\" component. But I think we can do better for the operator prop...\"]})]})}function u(t={}){let{wrapper:e}=t.components||{};return e?(0,n.jsx)(e,{...t,children:(0,n.jsx)(d,{...t})}):d(t)}function k(t,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+t+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return j(E);})();\n;return Component;",[886],"https://www.epicreact.dev/workshops/react-fundamentals/props-ts/solution",{"_9":870,"_871":888,"_873":889},"/app/05.01.solution/test/",[875],{"_9":870,"_871":891},"/app/05.01.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/01.solution.props?view=editor&title=Props+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx","problemName",{"_469":478,"_466":895,"_487":906},{"_20":143,"_342":661,"_848":896,"_22":144,"_24":145,"_850":897,"_865":898,"_868":900,"_876":903,"_879":905,"_467":488,"_469":478,"_9":466,"_881":147},"02.problem.narrow","var Component=(()=>{var h=Object.create;var l=Object.defineProperty;var b=Object.getOwnPropertyDescriptor;var y=Object.getOwnPropertyNames;var u=Object.getPrototypeOf,v=Object.prototype.hasOwnProperty;var m=(r,e)=>()=>(e||r((e={exports:{}}).exports,e),e.exports),g=(r,e)=>{for(var a in e)l(r,a,{get:e[a],enumerable:!0})},t=(r,e,a,s)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let o of y(e))!v.call(r,o)&&o!==a&&l(r,o,{get:()=>e[o],enumerable:!(s=b(e,o))||s.enumerable});return r};var w=(r,e,a)=>(a=r!=null?h(u(r)):{},t(e||!r||!r.__esModule?l(a,\"default\",{value:r,enumerable:!0}):a,r)),f=r=>t(l({},\"__esModule\",{value:!0}),r);var i=m((A,c)=>{c.exports=_jsx_runtime});var E={};g(E,{default:()=>p,frontmatter:()=>x});var n=w(i()),x=void 0;function d(r){let e={a:\"a\",code:\"code\",em:\"em\",h1:\"h1\",p:\"p\",pre:\"pre\",span:\"span\",...r.components},{EpicVideo:a}=e;return a||k(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Narrow Types\"}),`\n`,(0,n.jsx)(a,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/narrow-types\"}),`\n`,(0,n.jsxs)(e.p,{children:[\"\\u{1F468}\\u200D\\u{1F4BC} Our \",(0,n.jsx)(e.code,{children:\"CalculatorProps['operator']\"}),\" type being set simply to \",(0,n.jsx)(e.code,{children:\"string\"}),` is not\n\"narrow\" enough to help users of our `,(0,n.jsx)(e.code,{children:\"Calculator\"}),\" component. It allows \",(0,n.jsx)(e.em,{children:\"any\"}),`\n`,(0,n.jsx)(e.code,{children:\"string\"}),` value to be provided, even one which our Calculator doesn't support.\nFor example, the exponentiation operator `,(0,n.jsx)(e.code,{children:\"**\"}),` could be passed and TypeScript\nwon't complain, but this would cause a runtime error because we don't have a\nfunction to handle that operator:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsx)(e.code,{children:(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"element\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" <\",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"Calculator\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"left\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"2\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"operator\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"**\"}),'\"',\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"right\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"3\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" /> \",(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// \\u{1F4A5}\"}),`\n`]})})}),`\n`,(0,n.jsxs)(e.p,{children:[\"On top of that, the API for our \",(0,n.jsx)(e.code,{children:\"Calculator\"}),` isn't very discoverable. How would\npeople know which `,(0,n.jsx)(e.code,{children:\"operations\"}),\" are possible? Docs? Trial and error?\"]}),`\n`,(0,n.jsxs)(e.p,{children:[\"Rather than a \",(0,n.jsx)(e.code,{children:\"string\"}),`, your TypeScript type definition can be set to a specific\nstring. For example:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"KodyString\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Kody\"}),\"'\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"let\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"kody\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"KodyString\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// this variable can only ever be set to the string 'Kody'\"}),`\n`]})]})}),`\n`,(0,n.jsxs)(e.p,{children:[`Combine that functionality with\n`,(0,n.jsxs)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#union-types\",children:[\"union syntax of \",(0,n.jsx)(e.code,{children:\"|\"})]}),`\nand you'll be able to specify exactly which operators are allowed. For example:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"KodyOrHannahString\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Kody\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"|\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Hannah\"}),\"'\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"let\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"assistant\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"KodyOrHannahString\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// this variable can only ever be set to the string 'Kody' or 'Hannah'\"}),`\n`]}),(0,n.jsx)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:`\n`}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// \\u{1F4B0} tip: we could do the same thing without creating a type by inlining instead:\"}),`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"5\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// let assistant: 'Kody' | 'Hannah'\"}),`\n`]})]})}),`\n`,(0,n.jsxs)(e.p,{children:[\"How about we narrow our \",(0,n.jsx)(e.code,{children:\"operator\"}),\" type from a \",(0,n.jsx)(e.code,{children:\"string\"}),` to some specific strings\nusing a union.`]})]})}function p(r={}){let{wrapper:e}=r.components||{};return e?(0,n.jsx)(e,{...r,children:(0,n.jsx)(d,{...r})}):d(r)}function k(r,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+r+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return f(E);})();\n;return Component;",[899],"https://www.epicreact.dev/workshops/react-fundamentals/narrow-types",{"_9":870,"_871":901,"_873":902},"/app/05.02.problem/test/",[875],{"_9":870,"_871":904},"/app/05.02.problem/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/02.problem.narrow?view=editor&title=Narrow+Types+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_20":147,"_342":661,"_848":907,"_22":148,"_24":149,"_850":908,"_865":909,"_868":911,"_876":914,"_879":916,"_467":488,"_469":478,"_9":487,"_893":-5},"02.solution.narrow","var Component=(()=>{var h=Object.create;var s=Object.defineProperty;var m=Object.getOwnPropertyDescriptor;var f=Object.getOwnPropertyNames;var w=Object.getPrototypeOf,l=Object.prototype.hasOwnProperty;var x=(e,t)=>()=>(t||e((t={exports:{}}).exports,t),t.exports),_=(e,t)=>{for(var o in t)s(e,o,{get:t[o],enumerable:!0})},c=(e,t,o,i)=>{if(t&&typeof t==\"object\"||typeof t==\"function\")for(let r of f(t))!l.call(e,r)&&r!==o&&s(e,r,{get:()=>t[r],enumerable:!(i=m(t,r))||i.enumerable});return e};var g=(e,t,o)=>(o=e!=null?h(w(e)):{},c(t||!e||!e.__esModule?s(o,\"default\",{value:e,enumerable:!0}):o,e)),j=e=>c(s({},\"__esModule\",{value:!0}),e);var a=x((k,p)=>{p.exports=_jsx_runtime});var M={};_(M,{default:()=>u,frontmatter:()=>y});var n=g(a()),y=void 0;function d(e){let t={h1:\"h1\",p:\"p\",...e.components},{EpicVideo:o}=t;return o||E(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(t.h1,{children:\"Narrow Types\"}),`\n`,(0,n.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/narrow-types/solution\"}),`\n`,(0,n.jsx)(t.p,{children:`\\u{1F468}\\u200D\\u{1F4BC} Great, we've narrowed our types a bit which helps a lot with the experience\nof using our component props. But there's more to do! Let's keep going.`})]})}function u(e={}){let{wrapper:t}=e.components||{};return t?(0,n.jsx)(t,{...e,children:(0,n.jsx)(d,{...e})}):d(e)}function E(e,t){throw new Error(\"Expected \"+(t?\"component\":\"object\")+\" `\"+e+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return j(M);})();\n;return Component;",[910],"https://www.epicreact.dev/workshops/react-fundamentals/narrow-types/solution",{"_9":870,"_871":912,"_873":913},"/app/05.02.solution/test/",[875],{"_9":870,"_871":915},"/app/05.02.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/02.solution.narrow?view=editor&title=Narrow+Types+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_469":521,"_466":918,"_487":929},{"_20":151,"_342":663,"_848":919,"_22":152,"_24":153,"_850":920,"_865":921,"_868":923,"_876":926,"_879":928,"_467":488,"_469":521,"_9":466,"_881":155},"03.problem.derive","var Component=(()=>{var h=Object.create;var t=Object.defineProperty;var y=Object.getOwnPropertyDescriptor;var u=Object.getOwnPropertyNames;var b=Object.getPrototypeOf,m=Object.prototype.hasOwnProperty;var f=(r,e)=>()=>(e||r((e={exports:{}}).exports,e),e.exports),v=(r,e)=>{for(var o in e)t(r,o,{get:e[o],enumerable:!0})},l=(r,e,o,s)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let a of u(e))!m.call(r,a)&&a!==o&&t(r,a,{get:()=>e[a],enumerable:!(s=y(e,a))||s.enumerable});return r};var w=(r,e,o)=>(o=r!=null?h(b(r)):{},l(e||!r||!r.__esModule?t(o,\"default\",{value:r,enumerable:!0}):o,r)),k=r=>l(t({},\"__esModule\",{value:!0}),r);var d=f((C,c)=>{c.exports=_jsx_runtime});var E={};v(E,{default:()=>p,frontmatter:()=>g});var n=w(d()),g=void 0;function i(r){let e={a:\"a\",code:\"code\",h1:\"h1\",p:\"p\",pre:\"pre\",span:\"span\",...r.components},{EpicVideo:o}=e;return o||x(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Derive Types\"}),`\n`,(0,n.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/derive-types\"}),`\n`,(0,n.jsxs)(e.p,{children:[\"\\u{1F468}\\u200D\\u{1F4BC} You may have noticed that we're duplicating our operators of \",(0,n.jsx)(e.code,{children:\"+\"}),\", \",(0,n.jsx)(e.code,{children:\"-\"}),\", \",(0,n.jsx)(e.code,{children:\"*\"}),`,\nand `,(0,n.jsx)(e.code,{children:\"/\"}),`. Any time we want to add a new operator, we have to add it in two places\nand if we miss one then we could either have a runtime error, or users won't be\nable to use our new operator at all.`]}),`\n`,(0,n.jsx)(e.p,{children:`It would be better if we could have the compiler let us know we missed one\n(foreshadowing... look forward to that in an upcoming step) or just\nderive the possible operators.`}),`\n`,(0,n.jsxs)(e.p,{children:[\"To do this, you need to know about two TypeScript keywords: \",(0,n.jsx)(e.code,{children:\"typeof\"}),` and\n`,(0,n.jsx)(e.code,{children:\"keyof\"}),\". Technically \",(0,n.jsx)(e.code,{children:\"typeof\"}),` is a JavaScript feature, but TypeScript builds on\ntop of this and will get you the TypeScript type for the given variable. So if\nyou say:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"const\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { name: \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"kody\"}),\"'\",\", isCute: \",(0,n.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"true\"}),\" }\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"typeof\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"user\"}),`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// type User = { name: string; isCute: boolean; }\"}),`\n`]})]})}),`\n`,(0,n.jsxs)(e.p,{children:[\"And then you can use \",(0,n.jsx)(e.code,{children:\"keyof\"}),` to get a union-ed type of strings of all the keys\nin a given type:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"UserKeys\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"keyof\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:'// type UserKeys = \"name\" | \"isCute\"'}),`\n`]})]})}),`\n`,(0,n.jsxs)(e.p,{children:[`\\u{1F4DC} Learn more about TypeScript's\n`,(0,n.jsxs)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/2/typeof-types.html\",children:[(0,n.jsx)(e.code,{children:\"typeof\"}),\" operator\"]}),`\nand\n`,(0,n.jsxs)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/2/keyof-types.html\",children:[(0,n.jsx)(e.code,{children:\"keyof\"}),\" operator\"]}),\".\"]}),`\n`,(0,n.jsxs)(e.p,{children:[\"With that, try and derive the type of the \",(0,n.jsx)(e.code,{children:\"CalculatorProps['operator']\"}),` so you\ndon't have to repeat yourself.`]})]})}function p(r={}){let{wrapper:e}=r.components||{};return e?(0,n.jsx)(e,{...r,children:(0,n.jsx)(i,{...r})}):i(r)}function x(r,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+r+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return k(E);})();\n;return Component;",[922],"https://www.epicreact.dev/workshops/react-fundamentals/derive-types",{"_9":870,"_871":924,"_873":925},"/app/05.03.problem/test/",[875],{"_9":870,"_871":927},"/app/05.03.problem/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/03.problem.derive?view=editor&title=Derive+Types+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_20":155,"_342":663,"_848":930,"_22":156,"_24":157,"_850":931,"_865":932,"_868":934,"_876":937,"_879":939,"_467":488,"_469":521,"_9":487,"_893":-5},"03.solution.derive","var Component=(()=>{var f=Object.create;var i=Object.defineProperty;var m=Object.getOwnPropertyDescriptor;var l=Object.getOwnPropertyNames;var h=Object.getPrototypeOf,x=Object.prototype.hasOwnProperty;var w=(e,t)=>()=>(t||e((t={exports:{}}).exports,t),t.exports),_=(e,t)=>{for(var n in t)i(e,n,{get:t[n],enumerable:!0})},c=(e,t,n,s)=>{if(t&&typeof t==\"object\"||typeof t==\"function\")for(let r of l(t))!x.call(e,r)&&r!==n&&i(e,r,{get:()=>t[r],enumerable:!(s=m(t,r))||s.enumerable});return e};var y=(e,t,n)=>(n=e!=null?f(h(e)):{},c(t||!e||!e.__esModule?i(n,\"default\",{value:e,enumerable:!0}):n,e)),j=e=>c(i({},\"__esModule\",{value:!0}),e);var p=w((D,d)=>{d.exports=_jsx_runtime});var E={};_(E,{default:()=>u,frontmatter:()=>v});var o=y(p()),v=void 0;function a(e){let t={h1:\"h1\",p:\"p\",...e.components},{EpicVideo:n}=t;return n||g(\"EpicVideo\",!0),(0,o.jsxs)(o.Fragment,{children:[(0,o.jsx)(t.h1,{children:\"Derive Types\"}),`\n`,(0,o.jsx)(n,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/derive-types/solution\"}),`\n`,(0,o.jsx)(t.p,{children:\"\\u{1F468}\\u200D\\u{1F4BC} Great! That's definitely a win for our developer productivity!\"})]})}function u(e={}){let{wrapper:t}=e.components||{};return t?(0,o.jsx)(t,{...e,children:(0,o.jsx)(a,{...e})}):a(e)}function g(e,t){throw new Error(\"Expected \"+(t?\"component\":\"object\")+\" `\"+e+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return j(E);})();\n;return Component;",[933],"https://www.epicreact.dev/workshops/react-fundamentals/derive-types/solution",{"_9":870,"_871":935,"_873":936},"/app/05.03.solution/test/",[875],{"_9":870,"_871":938},"/app/05.03.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/03.solution.derive?view=editor&title=Derive+Types+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_469":497,"_466":941,"_487":952},{"_20":159,"_342":665,"_848":942,"_22":160,"_24":161,"_850":943,"_865":944,"_868":946,"_876":949,"_879":951,"_467":488,"_469":497,"_9":466,"_881":163},"04.problem.default-props","var Component=(()=>{var h=Object.create;var s=Object.defineProperty;var b=Object.getOwnPropertyDescriptor;var y=Object.getOwnPropertyNames;var u=Object.getPrototypeOf,v=Object.prototype.hasOwnProperty;var m=(r,e)=>()=>(e||r((e={exports:{}}).exports,e),e.exports),f=(r,e)=>{for(var l in e)s(r,l,{get:e[l],enumerable:!0})},c=(r,e,l,o)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let n of y(e))!v.call(r,n)&&n!==l&&s(r,n,{get:()=>e[n],enumerable:!(o=b(e,n))||o.enumerable});return r};var k=(r,e,l)=>(l=r!=null?h(u(r)):{},c(e||!r||!r.__esModule?s(l,\"default\",{value:r,enumerable:!0}):l,r)),g=r=>c(s({},\"__esModule\",{value:!0}),r);var i=m((D,t)=>{t.exports=_jsx_runtime});var x={};f(x,{default:()=>p,frontmatter:()=>w});var a=k(i()),w=void 0;function d(r){let e={a:\"a\",code:\"code\",h1:\"h1\",p:\"p\",pre:\"pre\",span:\"span\",...r.components},{EpicVideo:l}=e;return l||E(\"EpicVideo\",!0),(0,a.jsxs)(a.Fragment,{children:[(0,a.jsx)(e.h1,{children:\"Default Props\"}),`\n`,(0,a.jsx)(l,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/default-props\"}),`\n`,(0,a.jsxs)(e.p,{children:[`\\u{1F468}\\u200D\\u{1F4BC} Sometimes you want to allow the user of your component to skip providing a\nprop and use a default value instead. To do this, we can use\n`,(0,a.jsx)(e.a,{href:\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment#Default_values_2\",children:\"destructuring default values syntax\"}),`,\nbut when users of our component try to skip a prop, TypeScript will complain\nbecause our type says all the elements of the `,(0,a.jsx)(e.code,{children:\"CalculatorProps\"}),` type are\nrequired.`]}),`\n`,(0,a.jsxs)(e.p,{children:[`So when you make a prop optional, make sure you provide any relevant default\nvalue as well as mark it as optional using the\n`,(0,a.jsx)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/2/objects.html#optional-properties\",children:\"optional properties syntax\"}),\":\"]}),`\n`,(0,a.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,a.jsxs)(e.code,{children:[(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"User\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"name\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0C)\"},children:\"string\"}),\"; \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"isCute\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"?:\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0C)\"},children:\"boolean\"}),\" }\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// name is required, isCute is optional, so these both compile:\"}),`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"const\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"kody\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { name: \",\"'\",(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Kody\"}),\"'\",\", isCute: \",(0,a.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"true\"}),\" }\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"const\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"peter\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" { name: \",\"'\",(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"Peter\"}),\"'\",\" }\",`\n`]})]})}),`\n`,(0,a.jsxs)(e.p,{children:[\"For this step, make all props optional. Default \",(0,a.jsx)(e.code,{children:\"left\"}),\" and \",(0,a.jsx)(e.code,{children:\"right\"}),` to\n`,(0,a.jsx)(e.code,{children:\"0\"}),\" and \",(0,a.jsx)(e.code,{children:\"operator\"}),\" to \",(0,a.jsx)(e.code,{children:\"'+'\"}),\". Then you can update the App to test it out:\"]}),`\n`,(0,a.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"tsx\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,a.jsxs)(e.code,{children:[(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"function\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"App\"}),\"() {\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[\"\t\",(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"return\"}),\" (\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[\"\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"div\"}),\">\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"4\",children:[\"\t\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"h1\"}),\">Calculator\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"5\",children:[\"\t\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"Calculator\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"left\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"1\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"right\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"2\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" />\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"6\",children:[\"\t\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"Calculator\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"operator\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"-\"}),'\"',\" />\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"7\",children:[\"\t\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"Calculator\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"left\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"1\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"operator\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"*\"}),'\"',\" />\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"8\",children:[\"\t\t\t<\",(0,a.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"Calculator\"}),\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"operator\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),'\"',(0,a.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"/\"}),'\"',\" \",(0,a.jsx)(e.span,{style:{color:\"var(--base0D)\"},children:\"right\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"{\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base09)\"},children:\"2\"}),(0,a.jsx)(e.span,{style:{color:\"var(--base0F)\"},children:\"}\"}),\" />\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"9\",children:[\"\t\t\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"10\",children:[\"\t)\",`\n`]}),(0,a.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"11\",children:[\"}\",`\n`]})]})})]})}function p(r={}){let{wrapper:e}=r.components||{};return e?(0,a.jsx)(e,{...r,children:(0,a.jsx)(d,{...r})}):d(r)}function E(r,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+r+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return g(x);})();\n;return Component;",[945],"https://www.epicreact.dev/workshops/react-fundamentals/default-props",{"_9":870,"_871":947,"_873":948},"/app/05.04.problem/test/",[875],{"_9":870,"_871":950},"/app/05.04.problem/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/04.problem.default-props?view=editor&title=Default+Props+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_20":163,"_342":665,"_848":953,"_22":164,"_24":165,"_850":954,"_865":955,"_868":957,"_876":960,"_879":962,"_467":488,"_469":497,"_9":487,"_893":-5},"04.solution.default-props","var Component=(()=>{var l=Object.create;var s=Object.defineProperty;var f=Object.getOwnPropertyDescriptor;var h=Object.getOwnPropertyNames;var m=Object.getPrototypeOf,w=Object.prototype.hasOwnProperty;var x=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),_=(t,e)=>{for(var o in e)s(t,o,{get:e[o],enumerable:!0})},i=(t,e,o,a)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let r of h(e))!w.call(t,r)&&r!==o&&s(t,r,{get:()=>e[r],enumerable:!(a=f(e,r))||a.enumerable});return t};var j=(t,e,o)=>(o=t!=null?l(m(t)):{},i(e||!t||!t.__esModule?s(o,\"default\",{value:t,enumerable:!0}):o,t)),g=t=>i(s({},\"__esModule\",{value:!0}),t);var d=x((k,c)=>{c.exports=_jsx_runtime});var M={};_(M,{default:()=>u,frontmatter:()=>y});var n=j(d()),y=void 0;function p(t){let e={h1:\"h1\",p:\"p\",...t.components},{EpicVideo:o}=e;return o||E(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Default Props\"}),`\n`,(0,n.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/default-props/solution\"}),`\n`,(0,n.jsx)(e.p,{children:`\\u{1F468}\\u200D\\u{1F4BC} In the React world we use default props all the time, so I'm glad that you\nknow all about how to do that now!`})]})}function u(t={}){let{wrapper:e}=t.components||{};return e?(0,n.jsx)(e,{...t,children:(0,n.jsx)(p,{...t})}):p(t)}function E(t,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+t+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return g(M);})();\n;return Component;",[956],"https://www.epicreact.dev/workshops/react-fundamentals/default-props/solution",{"_9":870,"_871":958,"_873":959},"/app/05.04.solution/test/",[875],{"_9":870,"_871":961},"/app/05.04.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/04.solution.default-props?view=editor&title=Default+Props+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_469":488,"_466":964,"_487":975},{"_20":167,"_342":667,"_848":965,"_22":168,"_24":169,"_850":966,"_865":967,"_868":969,"_876":972,"_879":974,"_467":488,"_469":488,"_9":466,"_881":171},"05.problem.function-types","var Component=(()=>{var p=Object.create;var r=Object.defineProperty;var u=Object.getOwnPropertyDescriptor;var y=Object.getOwnPropertyNames;var f=Object.getPrototypeOf,w=Object.prototype.hasOwnProperty;var m=(n,e)=>()=>(e||n((e={exports:{}}).exports,e),e.exports),g=(n,e)=>{for(var o in e)r(n,o,{get:e[o],enumerable:!0})},s=(n,e,o,a)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let i of y(e))!w.call(n,i)&&i!==o&&r(n,i,{get:()=>e[i],enumerable:!(a=u(e,i))||a.enumerable});return n};var b=(n,e,o)=>(o=n!=null?p(f(n)):{},s(e||!n||!n.__esModule?r(o,\"default\",{value:n,enumerable:!0}):o,n)),v=n=>s(r({},\"__esModule\",{value:!0}),n);var d=m((T,c)=>{c.exports=_jsx_runtime});var j={};g(j,{default:()=>h,frontmatter:()=>x});var t=b(d()),x=void 0;function l(n){let e={a:\"a\",code:\"code\",h1:\"h1\",li:\"li\",p:\"p\",ul:\"ul\",...n.components},{EpicVideo:o}=e;return o||k(\"EpicVideo\",!0),(0,t.jsxs)(t.Fragment,{children:[(0,t.jsx)(e.h1,{children:\"Reduce Duplication\"}),`\n`,(0,t.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/reduce-duplication\"}),`\n`,(0,t.jsx)(e.p,{children:`\\u{1F989} These last two steps have little to do with React and everything to\ndo with TypeScript. If you'd rather skip these two, I won't be offended \\u{1F972}`}),`\n`,(0,t.jsxs)(e.p,{children:[\"\\u{1F468}\\u200D\\u{1F4BC} One last thing that bugs me is the repetition in the \",(0,t.jsx)(e.code,{children:\"operations\"}),` type. The\ntype for every one of those functions is the same. They all accept two numbers\nand return a number.`]}),`\n`,(0,t.jsxs)(e.p,{children:[`One thing we could do is extract that function into a type and then tell\nTypeScript that the `,(0,t.jsx)(e.code,{children:\"operations\"}),\" object is a \",(0,t.jsx)(e.code,{children:\"Record\"}),` where the key is one of\nthe valid operators and the value is an `,(0,t.jsx)(e.code,{children:\"OperationFn\"}),\".\"]}),`\n`,(0,t.jsx)(e.p,{children:\"I'm going to let you try this one on your own.\"}),`\n`,(0,t.jsx)(e.p,{children:\"\\u{1F4B0} But I'll give you some hints:\"}),`\n`,(0,t.jsxs)(e.ul,{children:[`\n`,(0,t.jsxs)(e.li,{children:[`You'll need \\u{1F4DC}\n`,(0,t.jsxs)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/utility-types.html#recordkeys-type\",children:[\"TypeScript's \",(0,t.jsx)(e.code,{children:\"Record\"}),\" Utility Type\"]})]}),`\n`,(0,t.jsxs)(e.li,{children:[\"You'll have to manually create a union of all allowed \",(0,t.jsx)(e.code,{children:\"operations\"}),` again for\nthe Record's `,(0,t.jsx)(e.code,{children:\"key\"})]}),`\n`,(0,t.jsxs)(e.li,{children:[`You'll need to define \\u{1F4DC}\n`,(0,t.jsx)(e.a,{href:\"https://kentcdodds.com/blog/typescript-function-syntaxes\",children:\"a function type\"}),`\nfor the Record's value`]}),`\n`]}),`\n`,(0,t.jsx)(e.p,{children:`\\u{1F989} At the end of this one, you may prefer the previous version and that's fine.\nThis is just two ways to do it and they both come with trade-offs. Personally, I\nprefer this way to avoid typing all the functions individually.`}),`\n`,(0,t.jsx)(e.p,{children:`\\u{1F989} Also, you may wonder why we went back to repeating ourselves. Unfortunately\nthere's no way around it if you want to define the object as a Record with a\nspecific key. However! It's not as bad as before because if we make a mistake\nand forget to update both places, the compiler will complain at us rather than\nhaving a runtime error, so it's less of a problem. And there's actually a\nworkaround for this, which is what the next step is all about!`})]})}function h(n={}){let{wrapper:e}=n.components||{};return e?(0,t.jsx)(e,{...n,children:(0,t.jsx)(l,{...n})}):l(n)}function k(n,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+n+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return v(j);})();\n;return Component;",[968],"https://www.epicreact.dev/workshops/react-fundamentals/reduce-duplication",{"_9":870,"_871":970,"_873":971},"/app/05.05.problem/test/",[875],{"_9":870,"_871":973},"/app/05.05.problem/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/05.problem.function-types?view=editor&title=Reduce+Duplication+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_20":171,"_342":667,"_848":976,"_22":172,"_24":173,"_850":977,"_865":978,"_868":980,"_876":983,"_879":985,"_467":488,"_469":488,"_9":487,"_893":-5},"05.solution.function-types","var Component=(()=>{var l=Object.create;var r=Object.defineProperty;var h=Object.getOwnPropertyDescriptor;var m=Object.getOwnPropertyNames;var f=Object.getPrototypeOf,x=Object.prototype.hasOwnProperty;var w=(e,t)=>()=>(t||e((t={exports:{}}).exports,t),t.exports),_=(e,t)=>{for(var n in t)r(e,n,{get:t[n],enumerable:!0})},s=(e,t,n,c)=>{if(t&&typeof t==\"object\"||typeof t==\"function\")for(let i of m(t))!x.call(e,i)&&i!==n&&r(e,i,{get:()=>t[i],enumerable:!(c=h(t,i))||c.enumerable});return e};var g=(e,t,n)=>(n=e!=null?l(f(e)):{},s(t||!e||!e.__esModule?r(n,\"default\",{value:e,enumerable:!0}):n,e)),j=e=>s(r({},\"__esModule\",{value:!0}),e);var u=w((b,d)=>{d.exports=_jsx_runtime});var y={};_(y,{default:()=>a,frontmatter:()=>E});var o=g(u()),E=void 0;function p(e){let t={h1:\"h1\",p:\"p\",...e.components},{EpicVideo:n}=t;return n||M(\"EpicVideo\",!0),(0,o.jsxs)(o.Fragment,{children:[(0,o.jsx)(t.h1,{children:\"Reduce Duplication\"}),`\n`,(0,o.jsx)(n,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/reduce-duplication/solution\"}),`\n`,(0,o.jsx)(t.p,{children:`\\u{1F468}\\u200D\\u{1F4BC} Getting rid of duplication quite nice here. Well done! But we duplicated\nsomething else which is less nice...`})]})}function a(e={}){let{wrapper:t}=e.components||{};return t?(0,o.jsx)(t,{...e,children:(0,o.jsx)(p,{...e})}):p(e)}function M(e,t){throw new Error(\"Expected \"+(t?\"component\":\"object\")+\" `\"+e+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return j(y);})();\n;return Component;",[979],"https://www.epicreact.dev/workshops/react-fundamentals/reduce-duplication/solution",{"_9":870,"_871":981,"_873":982},"/app/05.05.solution/test/",[875],{"_9":870,"_871":984},"/app/05.05.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/05.solution.function-types?view=editor&title=Reduce+Duplication+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_469":669,"_466":987,"_487":998},{"_20":175,"_342":670,"_848":988,"_22":176,"_24":177,"_850":989,"_865":990,"_868":992,"_876":995,"_879":997,"_467":488,"_469":669,"_9":466,"_881":179},"06.problem.satisfies","var Component=(()=>{var h=Object.create;var o=Object.defineProperty;var y=Object.getOwnPropertyDescriptor;var b=Object.getOwnPropertyNames;var u=Object.getPrototypeOf,m=Object.prototype.hasOwnProperty;var v=(a,e)=>()=>(e||a((e={exports:{}}).exports,e),e.exports),w=(a,e)=>{for(var s in e)o(a,s,{get:e[s],enumerable:!0})},l=(a,e,s,t)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let r of b(e))!m.call(a,r)&&r!==s&&o(a,r,{get:()=>e[r],enumerable:!(t=y(e,r))||t.enumerable});return a};var f=(a,e,s)=>(s=a!=null?h(u(a)):{},l(e||!a||!a.__esModule?o(s,\"default\",{value:a,enumerable:!0}):s,a)),x=a=>l(o({},\"__esModule\",{value:!0}),a);var i=v((j,c)=>{c.exports=_jsx_runtime});var E={};w(E,{default:()=>p,frontmatter:()=>g});var n=f(i()),g=void 0;function d(a){let e={a:\"a\",code:\"code\",h1:\"h1\",p:\"p\",pre:\"pre\",span:\"span\",strong:\"strong\",...a.components},{EpicVideo:s}=e;return s||k(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Satisfies\"}),`\n`,(0,n.jsx)(s,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/satisfies\"}),`\n`,(0,n.jsxs)(e.p,{children:[`\\u{1F468}\\u200D\\u{1F4BC} Ok, so repeating ourselves there is not awesome. The problem is that we want\nto enforce the value of our `,(0,n.jsx)(e.code,{children:\"operations\"}),` object, but to do that we either have\nto widen the type of our `,(0,n.jsx)(e.code,{children:\"key\"}),` or list it explicitly as we're doing. This is\nbecause when you cast your object to a type, TypeScript widens your type as far\nas that cast. Here's a simple example of the problem:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"ts\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ValidCandies\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"twix\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"|\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"snickers\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"|\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"m&ms\"}),\"'\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"const\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"candy\"}),(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\":\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ValidCandies\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"twix\"}),\"'\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// candy is 'twix' | 'snickers' | 'm&ms'\"}),`\n`]})]})}),`\n`,(0,n.jsxs)(e.p,{children:[`What we need is some way to enforce the values of our object, without having to\nannotate our object. We can do this using TypeScript's\n`,(0,n.jsx)(e.a,{href:\"https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-9.html#the-satisfies-operator\",children:(0,n.jsx)(e.code,{children:\"satisfies\"})}),` syntax.\nFor example:`]}),`\n`,(0,n.jsx)(e.pre,{\"data-line-numbers\":\"true\",\"data-lang\":\"ts\",style:{color:\"var(--base05)\",backgroundColor:\"var(--base00)\"},children:(0,n.jsxs)(e.code,{children:[(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"1\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"type\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ValidCandies\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"twix\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"|\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"snickers\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"|\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"m&ms\"}),\"'\",`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"2\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"const\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base08)\"},children:\"candy\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"=\"}),\" \",\"'\",(0,n.jsx)(e.span,{style:{color:\"var(--base0B)\"},children:\"twix\"}),\"'\",\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0E)\"},children:\"satisfies\"}),\" \",(0,n.jsx)(e.span,{style:{color:\"var(--base0A)\"},children:\"ValidCandies\"}),`\n`]}),(0,n.jsxs)(e.span,{className:\"codeblock-line\",\"data-line-number\":\"3\",children:[(0,n.jsx)(e.span,{style:{color:\"var(--base03)\"},children:\"// candy is 'twix'\"}),`\n`]})]})}),`\n`,(0,n.jsx)(e.p,{children:\"See? No type widening! Wahoo!\"}),`\n`,(0,n.jsx)(\"callout-info\",{children:(0,n.jsxs)(e.p,{children:[\"Before \",(0,n.jsx)(e.code,{children:\"satisfies\"}),` came out, we had to use a \"Constrained Identity Function\"\n(pattern coined by yours truly). Learn more in `,(0,n.jsx)(e.strong,{children:(0,n.jsx)(e.a,{href:\"https://kentcdodds.com/blog/how-to-write-a-constrained-identity-function-in-typescript\",children:`How to write a Constrained\nIdentity Function (CIF) in\nTypeScript`})})]})})]})}function p(a={}){let{wrapper:e}=a.components||{};return e?(0,n.jsx)(e,{...a,children:(0,n.jsx)(d,{...a})}):d(a)}function k(a,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+a+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return x(E);})();\n;return Component;",[991],"https://www.epicreact.dev/workshops/react-fundamentals/satisfies",{"_9":870,"_871":993,"_873":994},"/app/05.06.problem/test/",[875],{"_9":870,"_871":996},"/app/05.06.problem/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/06.problem.satisfies?view=editor&title=Satisfies+%28problem%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",{"_20":179,"_342":670,"_848":999,"_22":180,"_24":181,"_850":1000,"_865":1001,"_868":1003,"_876":1006,"_879":1008,"_467":488,"_469":669,"_9":487,"_893":-5},"06.solution.satisfies","var Component=(()=>{var h=Object.create;var i=Object.defineProperty;var u=Object.getOwnPropertyDescriptor;var l=Object.getOwnPropertyNames;var m=Object.getPrototypeOf,x=Object.prototype.hasOwnProperty;var _=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),w=(t,e)=>{for(var o in e)i(t,o,{get:e[o],enumerable:!0})},c=(t,e,o,s)=>{if(e&&typeof e==\"object\"||typeof e==\"function\")for(let r of l(e))!x.call(t,r)&&r!==o&&i(t,r,{get:()=>e[r],enumerable:!(s=u(e,r))||s.enumerable});return t};var j=(t,e,o)=>(o=t!=null?h(m(t)):{},c(e||!t||!t.__esModule?i(o,\"default\",{value:t,enumerable:!0}):o,t)),g=t=>c(i({},\"__esModule\",{value:!0}),t);var d=_((k,a)=>{a.exports=_jsx_runtime});var M={};w(M,{default:()=>f,frontmatter:()=>y});var n=j(d()),y=void 0;function p(t){let e={h1:\"h1\",p:\"p\",...t.components},{EpicVideo:o}=e;return o||E(\"EpicVideo\",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(e.h1,{children:\"Satisfies\"}),`\n`,(0,n.jsx)(o,{url:\"https://www.epicreact.dev/workshops/react-fundamentals/satisfies/solution\"}),`\n`,(0,n.jsx)(e.p,{children:\"\\u{1F468}\\u200D\\u{1F4BC} That is...\"}),`\n`,(0,n.jsx)(e.p,{children:\"...\"}),`\n`,(0,n.jsx)(e.p,{children:\"...\"}),`\n`,(0,n.jsx)(e.p,{children:\"Satisfactory. \\u{1F921}\"})]})}function f(t={}){let{wrapper:e}=t.components||{};return e?(0,n.jsx)(e,{...t,children:(0,n.jsx)(p,{...t})}):p(t)}function E(t,e){throw new Error(\"Expected \"+(e?\"component\":\"object\")+\" `\"+t+\"` to be defined: you likely forgot to import, pass, or provide it.\")}return g(M);})();\n;return Component;",[1002],"https://www.epicreact.dev/workshops/react-fundamentals/satisfies/solution",{"_9":870,"_871":1004,"_873":1005},"/app/05.06.solution/test/",[875],{"_9":870,"_871":1007},"/app/05.06.solution/","https://stackblitz.com/github/epicweb-dev/react-fundamentals/tree/main/exercises/05.typescript/06.solution.satisfies?view=editor&title=Satisfies+%28solution%29&hidedevtools=1&terminalHeight=0&hideNavigation=1&file=index.tsx",[1010,1015,1020,1025,1030,1035],{"_20":135,"_342":637,"_848":863,"_22":136,"_24":137,"_850":864,"_865":1011,"_868":1012,"_876":1014,"_879":880,"_467":488,"_469":468,"_9":466,"_881":139},[867],{"_9":870,"_871":872,"_873":1013},[875],{"_9":870,"_871":878},{"_20":143,"_342":661,"_848":896,"_22":144,"_24":145,"_850":897,"_865":1016,"_868":1017,"_876":1019,"_879":905,"_467":488,"_469":478,"_9":466,"_881":147},[899],{"_9":870,"_871":901,"_873":1018},[875],{"_9":870,"_871":904},{"_20":151,"_342":663,"_848":919,"_22":152,"_24":153,"_850":920,"_865":1021,"_868":1022,"_876":1024,"_879":928,"_467":488,"_469":521,"_9":466,"_881":155},[922],{"_9":870,"_871":924,"_873":1023},[875],{"_9":870,"_871":927},{"_20":159,"_342":665,"_848":942,"_22":160,"_24":161,"_850":943,"_865":1026,"_868":1027,"_876":1029,"_879":951,"_467":488,"_469":497,"_9":466,"_881":163},[945],{"_9":870,"_871":947,"_873":1028},[875],{"_9":870,"_871":950},{"_20":167,"_342":667,"_848":965,"_22":168,"_24":169,"_850":966,"_865":1031,"_868":1032,"_876":1034,"_879":974,"_467":488,"_469":488,"_9":466,"_881":171},[968],{"_9":870,"_871":970,"_873":1033},[875],{"_9":870,"_871":973},{"_20":175,"_342":670,"_848":988,"_22":176,"_24":177,"_850":989,"_865":1036,"_868":1037,"_876":1039,"_879":997,"_467":488,"_469":669,"_9":466,"_881":179},[991],{"_9":870,"_871":993,"_873":1038},[875],{"_9":870,"_871":996},[1041,1046,1051,1056,1061,1066],{"_20":139,"_342":637,"_848":883,"_22":140,"_24":141,"_850":884,"_865":1042,"_868":1043,"_876":1045,"_879":892,"_467":488,"_469":468,"_9":487,"_893":-5},[886],{"_9":870,"_871":888,"_873":1044},[875],{"_9":870,"_871":891},{"_20":147,"_342":661,"_848":907,"_22":148,"_24":149,"_850":908,"_865":1047,"_868":1048,"_876":1050,"_879":916,"_467":488,"_469":478,"_9":487,"_893":-5},[910],{"_9":870,"_871":912,"_873":1049},[875],{"_9":870,"_871":915},{"_20":155,"_342":663,"_848":930,"_22":156,"_24":157,"_850":931,"_865":1052,"_868":1053,"_876":1055,"_879":939,"_467":488,"_469":521,"_9":487,"_893":-5},[933],{"_9":870,"_871":935,"_873":1054},[875],{"_9":870,"_871":938},{"_20":163,"_342":665,"_848":953,"_22":164,"_24":165,"_850":954,"_865":1057,"_868":1058,"_876":1060,"_879":962,"_467":488,"_469":497,"_9":487,"_893":-5},[956],{"_9":870,"_871":958,"_873":1059},[875],{"_9":870,"_871":961},{"_20":171,"_342":667,"_848":976,"_22":172,"_24":173,"_850":977,"_865":1062,"_868":1063,"_876":1065,"_879":985,"_467":488,"_469":488,"_9":487,"_893":-5},[979],{"_9":870,"_871":981,"_873":1064},[875],{"_9":870,"_871":984},{"_20":179,"_342":670,"_848":999,"_22":180,"_24":181,"_850":1000,"_865":1067,"_868":1068,"_876":1070,"_879":1008,"_467":488,"_469":669,"_9":487,"_893":-5},[1002],{"_9":870,"_871":1004,"_873":1069},[875],{"_9":870,"_871":1007},"exerciseFormEmbedUrl","https://docs.google.com/forms/d/e/1FAIpQLSf3o9xyjQepTlOTH5Z7ZwkeSTdXh6YWI_RGc9KiyD3oUN0p6w/viewform?hl=en&embedded=true&entry.1836176234=React%20Fundamentals%20%E2%9A%9B&entry.428900931=TypeScript","epicVideoInfosPromise",["P",1074],"exerciseFinished",{"_1077":1078,"_24":1079},"file","/myapp/workshop-content/exercises/05.typescript/FINISHED.mdx","exercises/05.typescript/FINISHED.mdx","prevStepLink",{"_1082":1083,"_1084":1085},"to","/exercise/05/06/solution","aria-label","Satisfies (solution)","nextStepLink",{"_1082":1088,"_1084":698},"/exercise/06","actionData","errors"]

05. TypeScript/Elaboration