[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:en:frontend\u002Fvue-composition-api":4,"config":235},null,{"field_key":5,"field_name":6,"seniority":7,"topic_key":8,"topic_name":9,"spec_key":7,"spec_name":7,"locale":10,"cell_total":11,"field_total":12,"seniorities":13,"topics":17,"specs":133,"samples":150},"frontend","Frontend","","vue-composition-api","Vue Composition Api","en",75,2925,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,118,121,124,127,130],{"key":19,"name":20,"count":11},"accessibility","Accessibility",{"key":22,"name":23,"count":11},"angular-change-detection","Angular Change Detection",{"key":25,"name":26,"count":11},"angular-components-lifecycle","Angular Components Lifecycle",{"key":28,"name":29,"count":11},"angular-dependency-injection","Angular Dependency Injection",{"key":31,"name":32,"count":11},"angular-directives-pipes","Angular Directives Pipes",{"key":34,"name":35,"count":11},"angular-router-forms","Angular Router Forms",{"key":37,"name":38,"count":11},"angular-testing-performance","Angular Testing Performance",{"key":40,"name":41,"count":11},"css-layout","Css Layout",{"key":43,"name":44,"count":11},"dom-browser-apis","Dom Browser Apis",{"key":46,"name":47,"count":11},"javascript-async-concurrency","Javascript Async Concurrency",{"key":49,"name":50,"count":11},"javascript-language","Javascript Language",{"key":52,"name":53,"count":11},"javascript-memory-performance","Javascript Memory Performance",{"key":55,"name":56,"count":11},"javascript-modules-bundling","Javascript Modules Bundling",{"key":58,"name":59,"count":11},"javascript-prototypes-oop","Javascript Prototypes Oop",{"key":61,"name":62,"count":11},"javascript-runtime-apis","Javascript Runtime Apis",{"key":64,"name":65,"count":11},"javascript-testing-tooling","Javascript Testing Tooling",{"key":67,"name":68,"count":11},"performance","Performance",{"key":70,"name":71,"count":11},"react-components-jsx","React Components Jsx",{"key":73,"name":74,"count":11},"react-context-state","React Context State",{"key":76,"name":77,"count":11},"react-effects-lifecycle","React Effects Lifecycle",{"key":79,"name":80,"count":11},"react-forms-suspense","React Forms Suspense",{"key":82,"name":83,"count":11},"react-hooks-state","React Hooks State",{"key":85,"name":86,"count":11},"react-rendering-performance","React Rendering Performance",{"key":88,"name":89,"count":11},"rendering-reactivity","Rendering Reactivity",{"key":91,"name":92,"count":11},"state-management","State Management",{"key":94,"name":95,"count":11},"testing","Testing",{"key":97,"name":98,"count":11},"typescript-advanced-types","Typescript Advanced Types",{"key":100,"name":101,"count":11},"typescript-generics","Typescript Generics",{"key":103,"name":104,"count":11},"typescript-modules-declarations","Typescript Modules Declarations",{"key":106,"name":107,"count":11},"typescript-narrowing-control-flow","Typescript Narrowing Control Flow",{"key":109,"name":110,"count":11},"typescript-tooling-config","Typescript Tooling Config",{"key":112,"name":113,"count":11},"typescript-type-fundamentals","Typescript Type Fundamentals",{"key":115,"name":116,"count":11},"vue-components-props","Vue Components Props",{"key":8,"name":9,"count":11},{"key":119,"name":120,"count":11},"vue-directives-templates","Vue Directives Templates",{"key":122,"name":123,"count":11},"vue-performance-testing","Vue Performance Testing",{"key":125,"name":126,"count":11},"vue-reactivity-system","Vue Reactivity System",{"key":128,"name":129,"count":11},"vue-router-state-management","Vue Router State Management",{"key":131,"name":132,"count":11},"web-security","Web Security",[134,138,141,144,147],{"key":135,"name":136,"count":137},"angular","Angular",450,{"key":139,"name":140,"count":137},"javascript","JavaScript",{"key":142,"name":143,"count":137},"react","React",{"key":145,"name":146,"count":137},"typescript","TypeScript",{"key":148,"name":149,"count":137},"vue","Vue",[151,169,182,196,209,222],{"id":152,"topic":9,"difficulty":153,"body":154,"options":155,"correct_key":160,"explanation":168},"019f7766-2f83-7f1a-8a6e-216f7378bb98",1,"In Vue 3's Composition API, what two arguments does the `setup()` function receive?",[156,159,162,165],{"key":157,"text":158},"a","`data` and `methods`",{"key":160,"text":161},"b","`props` and `context`",{"key":163,"text":164},"c","`this` and `router`",{"key":166,"text":167},"d","`state` and `dispatch`","`setup(props, context)` is the entry point of the Composition API. `props` is a reactive object of the resolved props, and `context` is a plain object exposing `attrs`, `slots`, `emit`, and `expose` (it is NOT reactive itself, unlike `props`).",{"id":170,"topic":9,"difficulty":153,"body":171,"options":172,"correct_key":157,"explanation":181},"019f7766-2f85-77cd-97ef-cd867f270b74","In a `\u003Cscript setup>` block, how do top-level variables and functions become available in the component's template?",[173,175,177,179],{"key":157,"text":174},"Automatically — no `return` needed",{"key":160,"text":176},"By calling `defineExpose()` for each one",{"key":163,"text":178},"By adding them to a `return` object, like in `setup()`",{"key":166,"text":180},"Only imports from `vue` are exposed","`\u003Cscript setup>` is compile-time syntax sugar: any top-level binding (variable, function, import) declared in the block is automatically available in the template — there is no `return` statement at all, unlike the regular `setup()` function form.",{"id":183,"topic":9,"difficulty":184,"body":185,"options":186,"correct_key":163,"explanation":195},"019f7766-2f86-72dc-8926-f235d69b3218",2,"What naming convention do Vue composables follow, and why?",[187,189,191,193],{"key":157,"text":188},"They must end in `Composable`",{"key":160,"text":190},"There is no convention",{"key":163,"text":192},"They start with `use` (e.g. `useMouse`)",{"key":166,"text":194},"They are named after their file","The `useXxx` naming convention (borrowed from React hooks) is a community\u002Ftooling convention, not a language rule enforced by Vue itself — but it signals to readers and linters that the function likely calls other composition APIs (like `ref`, lifecycle hooks) internally.",{"id":197,"topic":9,"difficulty":184,"body":198,"options":199,"correct_key":160,"explanation":208},"019f7766-2f87-792f-ba1b-0f122405f5bc","```javascript\nimport { ref, onMounted } from 'vue';\n\nexport default {\n  setup() {\n    const box = ref(null);\n    onMounted(() => {\n      console.log(box.value.offsetWidth);\n    });\n    return { box };\n  }\n};\n```\nAssuming `box` is bound to a `\u003Cdiv ref=\"box\">` in the template, why does `box.value.offsetWidth` work here but would fail if read directly in the body of `setup()`?",[200,202,204,206],{"key":157,"text":201},"`ref()` always returns `null` regardless of context",{"key":160,"text":203},"The DOM element isn't there yet during `setup()` itself",{"key":163,"text":205},"`offsetWidth` only exists inside lifecycle hooks",{"key":166,"text":207},"`console.log` cannot run inside `setup()`","Template refs are only populated with the actual DOM element after the component's render output has been mounted. `setup()` runs before that mounting happens, so `box.value` is still `null` there — `onMounted` is specifically the hook that guarantees the DOM exists.",{"id":210,"topic":9,"difficulty":153,"body":211,"options":212,"correct_key":160,"explanation":221},"019f7766-2f88-749f-9c0a-7d3aeb428304","Inside a component's `setup()` function, what does `this` refer to?",[213,215,217,219],{"key":157,"text":214},"The component instance, like in `methods`",{"key":160,"text":216},"`undefined`",{"key":163,"text":218},"The parent component instance",{"key":166,"text":220},"The global `window` object","`setup()` runs before the component instance is fully created, and Vue explicitly does not bind `this` inside it — attempting to use `this` in `setup()` returns `undefined`. This is a deliberate design choice pushing all state\u002Flogic through the function's own scope (via `ref`\u002F`reactive`) instead of an instance.",{"id":223,"topic":9,"difficulty":184,"body":224,"options":225,"correct_key":157,"explanation":234},"019f7766-2f89-7b00-909f-95fa9b3b2baf","```javascript\n\u002F\u002F theme.js\nimport { inject } from 'vue';\n\nexport function useTheme() {\n  const theme = inject('theme', 'light');\n  return { theme };\n}\n```\nIf a component calls `useTheme()` but no ancestor component has called `provide('theme', ...)`, what does `theme` end up being?",[226,228,230,232],{"key":157,"text":227},"`'light'`",{"key":160,"text":229},"`undefined`, plus a runtime error",{"key":163,"text":231},"An empty reactive object",{"key":166,"text":233},"It waits for a provider to mount","`inject(key, defaultValue)` accepts an optional default value that is used when no matching `provide()` call is found up the ancestor chain — no error is thrown, `theme` simply resolves to `'light'` here.",{"fields":236,"seniorities":410,"interview_shapes":411,"locales":416,"oauth":418,"question_count":421,"coach_enabled":422,"jd_match_enabled":422},[237,262,270,287,311,324,343,362,384,391,397,404],{"key":238,"name_tr":239,"name_en":239,"sort":153,"specializations":240},"backend","Backend",[241,244,247,250,253,256,259],{"key":242,"name":243,"field":238},"general","Genel",{"key":245,"name":246,"field":238},"go","Go",{"key":248,"name":249,"field":238},"python","Python",{"key":251,"name":252,"field":238},"java","Java",{"key":254,"name":255,"field":238},"csharp","C#\u002F.NET",{"key":257,"name":258,"field":238},"nodejs","Node.js",{"key":260,"name":261,"field":238},"php","PHP",{"key":5,"name_tr":6,"name_en":6,"sort":184,"specializations":263},[264,265,266,267,268,269],{"key":242,"name":243,"field":5},{"key":139,"name":140,"field":5},{"key":145,"name":146,"field":5},{"key":142,"name":143,"field":5},{"key":148,"name":149,"field":5},{"key":135,"name":136,"field":5},{"key":271,"name_tr":272,"name_en":272,"sort":273,"specializations":274},"fullstack","Fullstack",3,[275,276,277,278,279,280,281,282,283,284,285,286],{"key":242,"name":243,"field":271},{"key":245,"name":246,"field":238},{"key":248,"name":249,"field":238},{"key":251,"name":252,"field":238},{"key":254,"name":255,"field":238},{"key":257,"name":258,"field":238},{"key":260,"name":261,"field":238},{"key":139,"name":140,"field":5},{"key":145,"name":146,"field":5},{"key":142,"name":143,"field":5},{"key":148,"name":149,"field":5},{"key":135,"name":136,"field":5},{"key":288,"name_tr":289,"name_en":289,"sort":290,"specializations":291},"devops-cloud","DevOps \u002F Cloud",4,[292,293,296,299,302,305,308],{"key":242,"name":243,"field":288},{"key":294,"name":295,"field":288},"aws","AWS",{"key":297,"name":298,"field":288},"gcp","GCP",{"key":300,"name":301,"field":288},"azure","Azure",{"key":303,"name":304,"field":288},"kubernetes","Kubernetes",{"key":306,"name":307,"field":288},"terraform","Terraform",{"key":309,"name":310,"field":288},"linux","Linux",{"key":312,"name_tr":313,"name_en":313,"sort":314,"specializations":315},"ai-engineer","AI Engineer",5,[316,317,318,321],{"key":242,"name":243,"field":312},{"key":248,"name":249,"field":312},{"key":319,"name":320,"field":312},"llm-rag","LLM\u002FRAG",{"key":322,"name":323,"field":312},"mlops","MLOps",{"key":325,"name_tr":326,"name_en":327,"sort":328,"specializations":329},"database","Veritabanı","Database",6,[330,331,334,337,340],{"key":242,"name":243,"field":325},{"key":332,"name":333,"field":325},"postgresql","PostgreSQL",{"key":335,"name":336,"field":325},"mysql","MySQL",{"key":338,"name":339,"field":325},"mongodb","MongoDB",{"key":341,"name":342,"field":325},"redis","Redis",{"key":344,"name_tr":345,"name_en":346,"sort":347,"specializations":348},"mobile","Mobil","Mobile",7,[349,350,353,356,359],{"key":242,"name":243,"field":344},{"key":351,"name":352,"field":344},"ios-swift","iOS (Swift)",{"key":354,"name":355,"field":344},"android-kotlin","Android (Kotlin)",{"key":357,"name":358,"field":344},"flutter","Flutter",{"key":360,"name":361,"field":344},"react-native","React Native",{"key":363,"name_tr":364,"name_en":365,"sort":366,"specializations":367},"security","Güvenlik","Security",8,[368,369,372,375,378,381],{"key":242,"name":243,"field":363},{"key":370,"name":371,"field":363},"appsec","AppSec",{"key":373,"name":374,"field":363},"offensive-pentest","Offensive \u002F Pentest",{"key":376,"name":377,"field":363},"cloud-security","Cloud Security",{"key":379,"name":380,"field":363},"devsecops","DevSecOps",{"key":382,"name":383,"field":363},"blue-team-incident","Blue Team \u002F Incident",{"key":385,"name_tr":386,"name_en":387,"sort":388,"specializations":389},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[390],{"key":242,"name":243,"field":385},{"key":392,"name_tr":393,"name_en":393,"sort":394,"specializations":395},"data-engineer","Data Engineer",10,[396],{"key":242,"name":243,"field":392},{"key":398,"name_tr":399,"name_en":400,"sort":401,"specializations":402},"game-dev","Oyun Geliştirme","Game Development",11,[403],{"key":242,"name":243,"field":398},{"key":405,"name_tr":406,"name_en":406,"sort":407,"specializations":408},"ml-engineer","ML Engineer",12,[409],{"key":242,"name":243,"field":405},[14,15,16],{"junior":412,"mid":414,"senior":415},{"questions":413,"median_sec":3},20,{"questions":413,"median_sec":3},{"questions":413,"median_sec":3},[417,10],"tr",[419,420],"google","github",21750,true]