[{"data":1,"prerenderedAt":3708},["ShallowReactive",2],{"navigation":3,"/document/source-vue3/guide/reactive":1519,"/document/source-vue3/guide/reactive-surround":3703},[4],{"title":5,"path":6,"stem":7,"children":8,"page":50},"Document","/document","document",[9,51,118,150,207,263,307,343,363,403,447,479,518,558,585,609,633,665,700,731,762,794,831,863,899,929,964,1000,1036,1075,1110,1149,1181,1212,1243,1271,1307,1346,1378,1418,1455,1487],{"title":10,"path":11,"stem":12,"children":13,"page":50},"Html5","/document/html5","document/01.html5",[14,42],{"title":15,"path":16,"stem":17,"children":18,"icon":41},"指南","/document/html5/guide","document/01.html5/01.guide/01.index",[19,21,25,29,33,37],{"title":20,"path":16,"stem":17},"HTML 入门教程",{"title":22,"path":23,"stem":24},"常用标签详解","/document/html5/guide/tag","document/01.html5/01.guide/02.tag",{"title":26,"path":27,"stem":28},"布局与语义标签","/document/html5/guide/layout","document/01.html5/01.guide/03.layout",{"title":30,"path":31,"stem":32},"表单设计与用户输入","/document/html5/guide/form","document/01.html5/01.guide/04.form",{"title":34,"path":35,"stem":36},"多媒体与 HTML5 新特性","/document/html5/guide/html5","document/01.html5/01.guide/05.html5",{"title":38,"path":39,"stem":40},"Web 标准与 HTML 编写规范","/document/html5/guide/web","document/01.html5/01.guide/06.web","i-lucide-code",{"title":43,"path":44,"stem":45,"children":46,"icon":49},"考核","/document/html5/examine","document/01.html5/02.examine/01.index",[47],{"title":48,"path":44,"stem":45},"接下来对你进行考核","i-lucide-clipboard-check",false,{"title":52,"path":53,"stem":54,"children":55,"page":50},"Css","/document/css","document/02.css",[56,75,100,113],{"title":57,"path":58,"stem":59,"children":60,"icon":50},"启航","/document/css/guide","document/02.css/01.guide/01.index",[61,63,67,71],{"title":62,"path":58,"stem":59},"CSS 基础入门教程",{"title":64,"path":65,"stem":66},"文本与盒子样式详解","/document/css/guide/styles","document/02.css/01.guide/02.styles",{"title":68,"path":69,"stem":70},"选择器与权重机制","/document/css/guide/selected","document/02.css/01.guide/03.selected",{"title":72,"path":73,"stem":74},"盒模型详解","/document/css/guide/box","document/02.css/01.guide/04.box",{"title":76,"icon":50,"path":77,"stem":78,"children":79,"page":50},"布局","/document/css/layout","document/02.css/02.layout",[80,84,88,92,96],{"title":81,"path":82,"stem":83},"网页布局三剑客详解","/document/css/layout/policy","document/02.css/02.layout/01.policy",{"title":85,"path":86,"stem":87},"Position 定位详解","/document/css/layout/position","document/02.css/02.layout/02.position",{"title":89,"path":90,"stem":91},"Flexbox 布局入门指南","/document/css/layout/flex","document/02.css/02.layout/03.flex",{"title":93,"path":94,"stem":95},"Grid 布局入门指南","/document/css/layout/grid","document/02.css/02.layout/04.grid",{"title":97,"path":98,"stem":99},"响应式设计指南","/document/css/layout/relative","document/02.css/02.layout/05.relative",{"title":101,"icon":50,"path":102,"stem":103,"children":104,"page":50},"使用技巧","/document/css/skill","document/02.css/03.skill",[105,109],{"title":106,"path":107,"stem":108},"CSS 动画全解析","/document/css/skill/animation","document/02.css/03.skill/01.animation",{"title":110,"path":111,"stem":112},"CSS 使用技巧全攻略","/document/css/skill/skill","document/02.css/03.skill/02.skill",{"title":43,"path":114,"stem":115,"children":116,"icon":49},"/document/css/examine","document/02.css/04.examine/01.index",[117],{"title":48,"path":114,"stem":115},{"title":119,"path":120,"stem":121,"children":122,"page":50},"Git","/document/git","document/03.git",[123,145],{"title":57,"path":124,"stem":125,"children":126,"icon":50},"/document/git/guide","document/03.git/01.guide/01.index",[127,129,133,137,141],{"title":128,"path":124,"stem":125},"Git 入门指南",{"title":130,"path":131,"stem":132},"Git 安装与初体验","/document/git/guide/install","document/03.git/01.guide/02.install",{"title":134,"path":135,"stem":136},"常用 Git 命令详解","/document/git/guide/command","document/03.git/01.guide/03.command",{"title":138,"path":139,"stem":140},"Git 分支管理全解析","/document/git/guide/branch","document/03.git/01.guide/04.branch",{"title":142,"path":143,"stem":144},"使用 GitHub 轻松托管和管理代码","/document/git/guide/github","document/03.git/01.guide/05.github",{"title":43,"path":146,"stem":147,"children":148,"icon":49},"/document/git/examine","document/03.git/02.examine/01.index",[149],{"title":48,"path":146,"stem":147},{"title":151,"path":152,"stem":153,"children":154,"page":50},"Js Base","/document/js-base","document/04.js-base",[155,185,202],{"title":15,"path":156,"stem":157,"children":158,"icon":41},"/document/js-base/guide","document/04.js-base/01.guide/01.index",[159,161,165,169,173,177,181],{"title":160,"path":156,"stem":157},"JavaScript 基础快速入门",{"title":162,"path":163,"stem":164},"搞懂变量与数据类型","/document/js-base/guide/variable","document/04.js-base/01.guide/02.variable",{"title":166,"path":167,"stem":168},"JavaScript 运算符详解","/document/js-base/guide/operator","document/04.js-base/01.guide/03.operator",{"title":170,"path":171,"stem":172},"条件判断与循环语句","/document/js-base/guide/flow","document/04.js-base/01.guide/04.flow",{"title":174,"path":175,"stem":176},"深入理解 JavaScript 函数","/document/js-base/guide/function","document/04.js-base/01.guide/05.function",{"title":178,"path":179,"stem":180},"对象数组的创建与操作","/document/js-base/guide/object","document/04.js-base/01.guide/06.object",{"title":182,"path":183,"stem":184},"Math 和 Date 用法详解","/document/js-base/guide/math","document/04.js-base/01.guide/07.math",{"title":186,"icon":41,"path":187,"stem":188,"children":189,"page":50},"浏览器","/document/js-base/browser","document/04.js-base/02.browser",[190,194,198],{"title":191,"path":192,"stem":193},"DOM 操作入门与实战","/document/js-base/browser/dom","document/04.js-base/02.browser/01.dom",{"title":195,"path":196,"stem":197},"浏览器 BOM 基础知识","/document/js-base/browser/bom","document/04.js-base/02.browser/02.bom",{"title":199,"path":200,"stem":201},"JavaScript 事件处理机制","/document/js-base/browser/event","document/04.js-base/02.browser/03.event",{"title":43,"path":203,"stem":204,"children":205,"icon":49},"/document/js-base/examine","document/04.js-base/03.examine/01.index",[206],{"title":48,"path":203,"stem":204},{"title":208,"path":209,"stem":210,"children":211,"page":50},"Js Advanced","/document/js-advanced","document/05.js-advanced",[212,231,249],{"title":213,"path":214,"stem":215,"children":216,"icon":41},"JavaScript 原理","/document/js-advanced/guide","document/05.js-advanced/01.guide/01.index",[217,219,223,227],{"title":218,"path":214,"stem":215},"JavaScript 是怎么运行的？",{"title":220,"path":221,"stem":222},"深入理解函数和作用域","/document/js-advanced/guide/function","document/05.js-advanced/01.guide/02.function",{"title":224,"path":225,"stem":226},"深入理解 this 指向","/document/js-advanced/guide/this","document/05.js-advanced/01.guide/03.this",{"title":228,"path":229,"stem":230},"浅拷贝与深拷贝详解","/document/js-advanced/guide/copy","document/05.js-advanced/01.guide/04.copy",{"title":232,"icon":233,"path":234,"stem":235,"children":236,"page":50},"编程范式","i-lucide-shapes","/document/js-advanced/program","document/05.js-advanced/02.program",[237,241,245],{"title":238,"path":239,"stem":240},"面向对象编程（OOP）","/document/js-advanced/program/object","document/05.js-advanced/02.program/01.object",{"title":242,"path":243,"stem":244},"函数式编程入门","/document/js-advanced/program/fp","document/05.js-advanced/02.program/02.fp",{"title":246,"path":247,"stem":248},"防抖和节流详解","/document/js-advanced/program/debounce","document/05.js-advanced/02.program/03.debounce",{"title":250,"icon":251,"path":252,"stem":253,"children":254,"page":50},"浏览器相关特性","i-lucide-monitor","/document/js-advanced/browser","document/05.js-advanced/03.browser",[255,259],{"title":256,"path":257,"stem":258},"浏览器缓存入门指南","/document/js-advanced/browser/cache","document/05.js-advanced/03.browser/01.cache",{"title":260,"path":261,"stem":262},"Web 存储机制深度剖析","/document/js-advanced/browser/storage","document/05.js-advanced/03.browser/02.storage",{"title":264,"path":265,"stem":266,"children":267,"page":50},"Es6","/document/es6","document/06.es6",[268,302],{"title":213,"path":269,"stem":270,"children":271,"icon":41},"/document/es6/guide","document/06.es6/01.guide/01.index",[272,274,278,282,286,290,294,298],{"title":273,"path":269,"stem":270},"ES6 入门指南",{"title":275,"path":276,"stem":277},"变量声明：let 与 const","/document/es6/guide/const","document/06.es6/01.guide/02.const",{"title":279,"path":280,"stem":281},"箭头函数的用法与特点","/document/es6/guide/arrow","document/06.es6/01.guide/03.arrow",{"title":283,"path":284,"stem":285},"字符串、对象与数组的新特性","/document/es6/guide/enhance","document/06.es6/01.guide/04.enhance",{"title":287,"path":288,"stem":289},"Map 和 Set 的使用方式","/document/es6/guide/set","document/06.es6/01.guide/05.set",{"title":291,"path":292,"stem":293},"Promise 实现异步流程控制","/document/es6/guide/promise","document/06.es6/01.guide/06.promise",{"title":295,"path":296,"stem":297},"ESM 模块化语法解析","/document/es6/guide/esm","document/06.es6/01.guide/07.esm",{"title":299,"path":300,"stem":301},"Class 的定义与继承机制","/document/es6/guide/class","document/06.es6/01.guide/08.class",{"title":43,"path":303,"stem":304,"children":305,"icon":49},"/document/es6/examine","document/06.es6/02.examine/01.index",[306],{"title":48,"path":303,"stem":304},{"title":308,"path":309,"stem":310,"children":311,"page":50},"Js Algorithms","/document/js-algorithms","document/07.js-algorithms",[312,338],{"title":15,"path":313,"stem":314,"children":315,"icon":41},"/document/js-algorithms/guide","document/07.js-algorithms/01.guide/01.index",[316,318,322,326,330,334],{"title":317,"path":313,"stem":314},"什么是数据结构和算法？",{"title":319,"path":320,"stem":321},"时间和空间复杂度","/document/js-algorithms/guide/complexity","document/07.js-algorithms/01.guide/02.complexity",{"title":323,"path":324,"stem":325},"数据结构","/document/js-algorithms/guide/structure","document/07.js-algorithms/01.guide/03.structure",{"title":327,"path":328,"stem":329},"算法","/document/js-algorithms/guide/algorithms","document/07.js-algorithms/01.guide/04.algorithms",{"title":331,"path":332,"stem":333},"算法思想","/document/js-algorithms/guide/heuristic","document/07.js-algorithms/01.guide/05.heuristic",{"title":335,"path":336,"stem":337},"深度优先与广度优先搜索","/document/js-algorithms/guide/search","document/07.js-algorithms/01.guide/06.search",{"title":43,"path":339,"stem":340,"children":341,"icon":49},"/document/js-algorithms/examine","document/07.js-algorithms/02.examine/01.index",[342],{"title":48,"path":339,"stem":340},{"title":344,"path":345,"stem":346,"children":347,"page":50},"Automation","/document/automation","document/08.automation",[348,358],{"title":15,"path":349,"stem":350,"children":351,"icon":41},"/document/automation/guide","document/08.automation/01.guide/01.index",[352,354],{"title":353,"path":349,"stem":350},"什么是前端工程化？",{"title":355,"path":356,"stem":357},"开始搭建工程化项目","/document/automation/guide/start","document/08.automation/01.guide/02.start",{"title":43,"path":359,"stem":360,"children":361,"icon":49},"/document/automation/examine","document/08.automation/02.examine/01.index",[362],{"title":48,"path":359,"stem":360},{"title":364,"path":365,"stem":366,"children":367,"page":50},"Webpack","/document/webpack","document/09.webpack",[368,398],{"title":15,"path":369,"stem":370,"children":371,"icon":41},"/document/webpack/guide","document/09.webpack/01.guide/01.index",[372,374,378,382,386,390,394],{"title":373,"path":369,"stem":370},"Webpack 初识",{"title":375,"path":376,"stem":377},"搭建 Webpack 项目","/document/webpack/guide/start","document/09.webpack/01.guide/02.start",{"title":379,"path":380,"stem":381},"Loader 加载器","/document/webpack/guide/loader","document/09.webpack/01.guide/03.loader",{"title":383,"path":384,"stem":385},"Plugin 插件","/document/webpack/guide/plugin","document/09.webpack/01.guide/04.plugin",{"title":387,"path":388,"stem":389},"HMR 热更新与开发模式","/document/webpack/guide/dev","document/09.webpack/01.guide/05.dev",{"title":391,"path":392,"stem":393},"性能优化配置","/document/webpack/guide/optimize","document/09.webpack/01.guide/06.optimize",{"title":395,"path":396,"stem":397},"webpack 生产环境构建全攻略","/document/webpack/guide/production","document/09.webpack/01.guide/07.production",{"title":43,"path":399,"stem":400,"children":401,"icon":49},"/document/webpack/examine","document/09.webpack/02.examine/01.index",[402],{"title":48,"path":399,"stem":400},{"title":404,"path":405,"stem":406,"children":407,"page":50},"Scss","/document/scss","document/10.scss",[408,442],{"title":15,"path":409,"stem":410,"children":411,"icon":41},"/document/scss/guide","document/10.scss/01.guide/01.index",[412,414,418,422,426,430,434,438],{"title":413,"path":409,"stem":410},"什么是 SCSS？",{"title":415,"path":416,"stem":417},"SCSS 入门语法基础","/document/scss/guide/syntax","document/10.scss/01.guide/02.syntax",{"title":419,"path":420,"stem":421},"开始编写 Scss 项目","/document/scss/guide/start","document/10.scss/01.guide/03.start",{"title":423,"path":424,"stem":425},"Scss 模块导入方式","/document/scss/guide/import","document/10.scss/01.guide/04.import",{"title":427,"path":428,"stem":429},"Mixin 与函数详解","/document/scss/guide/mixin","document/10.scss/01.guide/05.mixin",{"title":431,"path":432,"stem":433},"Scss 继承、占位符技巧","/document/scss/guide/extend","document/10.scss/01.guide/06.extend",{"title":435,"path":436,"stem":437},"SCSS 流程控制与逻辑语法","/document/scss/guide/flow","document/10.scss/01.guide/07.flow",{"title":439,"path":440,"stem":441},"SCSS 内置函数","/document/scss/guide/function","document/10.scss/01.guide/08.function",{"title":43,"path":443,"stem":444,"children":445,"icon":49},"/document/scss/examine","document/10.scss/02.examine/01.index",[446],{"title":48,"path":443,"stem":444},{"title":448,"path":449,"stem":450,"children":451,"page":50},"Eslint","/document/eslint","document/11.eslint",[452,474],{"title":15,"path":453,"stem":454,"children":455,"icon":41},"/document/eslint/guide","document/11.eslint/01.guide/01.index",[456,458,462,466,470],{"title":457,"path":453,"stem":454},"ESLint 是什么？",{"title":459,"path":460,"stem":461},"ESLint 安装与运行详解","/document/eslint/guide/install","document/11.eslint/01.guide/02.install",{"title":463,"path":464,"stem":465},"ESLint  规则介绍","/document/eslint/guide/rule","document/11.eslint/01.guide/03.rule",{"title":467,"path":468,"stem":469},"集成 ESLint 到 Webpack","/document/eslint/guide/webpack","document/11.eslint/01.guide/04.webpack",{"title":471,"path":472,"stem":473},"Plugins 和 Extends 使用","/document/eslint/guide/plugins","document/11.eslint/01.guide/05.plugins",{"title":43,"path":475,"stem":476,"children":477,"icon":49},"/document/eslint/examine","document/11.eslint/02.examine/01.index",[478],{"title":48,"path":475,"stem":476},{"title":480,"path":481,"stem":482,"children":483,"page":50},"Axios","/document/axios","document/12.axios",[484,494,513],{"title":15,"path":485,"stem":486,"children":487,"icon":41},"/document/axios/guide","document/12.axios/01.guide/01.index",[488,490],{"title":489,"path":485,"stem":486},"HTTP 协议与网络请求",{"title":491,"path":492,"stem":493},"使用 JavaScript 发起请求","/document/axios/guide/get","document/12.axios/01.guide/02.get",{"title":495,"path":496,"stem":497,"children":498,"icon":41},"axios 插件","/document/axios/axios","document/12.axios/02.axios/01.index",[499,501,505,509],{"title":500,"path":496,"stem":497},"Axios 入门",{"title":502,"path":503,"stem":504},"Axios 请求基础全面讲解","/document/axios/axios/start","document/12.axios/02.axios/02.start",{"title":506,"path":507,"stem":508},"Axios 高级使用技巧","/document/axios/axios/advenced","document/12.axios/02.axios/03.advenced",{"title":510,"path":511,"stem":512},"CORS 跨域解决方案","/document/axios/axios/cors","document/12.axios/02.axios/04.cors",{"title":43,"path":514,"stem":515,"children":516,"icon":49},"/document/axios/examine","document/12.axios/03.examine/01.index",[517],{"title":48,"path":514,"stem":515},{"title":519,"path":520,"stem":521,"children":522,"page":50},"Typescript","/document/typescript","document/13.typescript",[523,553],{"title":15,"path":524,"stem":525,"children":526,"icon":41},"/document/typescript/guide","document/13.typescript/01.guide/01.index",[527,529,533,537,541,545,549],{"title":528,"path":524,"stem":525},"TypeScript 简介与入门",{"title":530,"path":531,"stem":532},"类型系统基础","/document/typescript/guide/base","document/13.typescript/01.guide/02.base",{"title":534,"path":535,"stem":536},"类型组合与类型保护","/document/typescript/guide/compose","document/13.typescript/01.guide/03.compose",{"title":538,"path":539,"stem":540},"类与面向对象编程","/document/typescript/guide/class","document/13.typescript/01.guide/04.class",{"title":542,"path":543,"stem":544},"泛型与类型复用","/document/typescript/guide/generic","document/13.typescript/01.guide/05.generic",{"title":546,"path":547,"stem":548},"项目进阶与配置实战","/document/typescript/guide/config","document/13.typescript/01.guide/06.config",{"title":550,"path":551,"stem":552},"第三方库类型支持与声明","/document/typescript/guide/declare","document/13.typescript/01.guide/07.declare",{"title":43,"path":554,"stem":555,"children":556,"icon":49},"/document/typescript/examine","document/13.typescript/02.examine/01.index",[557],{"title":48,"path":554,"stem":555},{"title":559,"path":560,"stem":561,"children":562,"page":50},"Vue2","/document/vue2","document/14.vue2",[563],{"title":15,"path":564,"stem":565,"children":566,"icon":41},"/document/vue2/guide","document/14.vue2/01.guide/01.index",[567,569,573,577,581],{"title":568,"path":564,"stem":565},"Vue 2 入门与安装",{"title":570,"path":571,"stem":572},"模板语法与指令详解","/document/vue2/guide/directive","document/14.vue2/01.guide/02.directive",{"title":574,"path":575,"stem":576},"组件化开发基础","/document/vue2/guide/component","document/14.vue2/01.guide/03.component",{"title":578,"path":579,"stem":580},"计算属性与监听器","/document/vue2/guide/reactive","document/14.vue2/01.guide/04.reactive",{"title":582,"path":583,"stem":584},"生命周期钩子解析","/document/vue2/guide/hooks","document/14.vue2/01.guide/05.hooks",{"title":586,"path":587,"stem":588,"children":589,"page":50},"Router","/document/router","document/15.router",[590],{"title":591,"path":592,"stem":593,"children":594,"icon":41},"Vue Router 路由","/document/router/guide","document/15.router/01.guide/01.index",[595,597,601,605],{"title":596,"path":592,"stem":593},"Vue Router 入门",{"title":598,"path":599,"stem":600},"路由核心功能详解","/document/router/guide/routing","document/15.router/01.guide/02.routing",{"title":602,"path":603,"stem":604},"路由守卫钩子和元信息","/document/router/guide/hook","document/15.router/01.guide/03.hook",{"title":606,"path":607,"stem":608},"路由优化与懒加载","/document/router/guide/optimize","document/15.router/01.guide/04.optimize",{"title":610,"path":611,"stem":612,"children":613,"page":50},"Vuex","/document/vuex","document/16.vuex",[614],{"title":615,"path":616,"stem":617,"children":618,"icon":41},"Vuex 状态管理器","/document/vuex/guide","document/16.vuex/01.guide/01.index",[619,621,625,629],{"title":620,"path":616,"stem":617},"为什么要使用 Vuex？",{"title":622,"path":623,"stem":624},"快速上手 Vuex","/document/vuex/guide/start","document/16.vuex/01.guide/02.start",{"title":626,"path":627,"stem":628},"深入理解 Vuex 核心功能","/document/vuex/guide/core","document/16.vuex/01.guide/03.core",{"title":630,"path":631,"stem":632},"模块化与进阶用法","/document/vuex/guide/module","document/16.vuex/01.guide/04.module",{"title":634,"path":635,"stem":636,"children":637,"page":50},"Element Ui","/document/element-ui","document/17.element-ui",[638],{"title":639,"path":640,"stem":641,"children":642,"icon":41},"Element UI 组件库","/document/element-ui/guide","document/17.element-ui/01.guide/01.index",[643,645,649,653,657,661],{"title":644,"path":640,"stem":641},"Element UI 初体验",{"title":646,"path":647,"stem":648},"常用组件快速上手","/document/element-ui/guide/quickstart","document/17.element-ui/01.guide/02.quickstart",{"title":650,"path":651,"stem":652},"布局与结构类组件","/document/element-ui/guide/layout","document/17.element-ui/01.guide/03.layout",{"title":654,"path":655,"stem":656},"自定义组件样式","/document/element-ui/guide/style","document/17.element-ui/01.guide/04.style",{"title":658,"path":659,"stem":660},"组件封装与复用","/document/element-ui/guide/component","document/17.element-ui/01.guide/05.component",{"title":662,"path":663,"stem":664},"自定义主题色与深色模式","/document/element-ui/guide/theme","document/17.element-ui/01.guide/06.theme",{"title":666,"path":667,"stem":668,"children":669,"page":50},"Vue3","/document/vue3","document/18.vue3",[670],{"title":666,"path":671,"stem":672,"children":673,"icon":41},"/document/vue3/guide","document/18.vue3/01.guide/01.index",[674,676,680,684,688,692,696],{"title":675,"path":671,"stem":672},"Vue 3 概览与生态升级",{"title":677,"path":678,"stem":679},"组合式 API 入门指南","/document/vue3/guide/composition","document/18.vue3/01.guide/02.composition",{"title":681,"path":682,"stem":683},"组合式 API 逻辑抽离","/document/vue3/guide/composable","document/18.vue3/01.guide/03.composable",{"title":685,"path":686,"stem":687},"模板语法及新特性","/document/vue3/guide/features","document/18.vue3/01.guide/04.features",{"title":689,"path":690,"stem":691},"TypeScript 开发支持","/document/vue3/guide/typescript","document/18.vue3/01.guide/05.typescript",{"title":693,"path":694,"stem":695},"响应式系统原理与进阶 API","/document/vue3/guide/reactive","document/18.vue3/01.guide/06.reactive",{"title":697,"path":698,"stem":699},"Vue Router 4 路由实战","/document/vue3/guide/vue-router","document/18.vue3/01.guide/07.vue-router",{"title":701,"path":702,"stem":703,"children":704,"page":50},"Pinia","/document/pinia","document/19.pinia",[705],{"title":701,"path":706,"stem":707,"children":708,"icon":41},"/document/pinia/guide","document/19.pinia/01.guide/01.index",[709,711,715,719,723,727],{"title":710,"path":706,"stem":707},"Pinia 简介与安装",{"title":712,"path":713,"stem":714},"Store 三大核心","/document/pinia/guide/store","document/19.pinia/01.guide/02.store",{"title":716,"path":717,"stem":718},"在组件中使用 Store","/document/pinia/guide/usage","document/19.pinia/01.guide/03.usage",{"title":720,"path":721,"stem":722},"State 修改与响应式细节","/document/pinia/guide/state","document/19.pinia/01.guide/04.state",{"title":724,"path":725,"stem":726},"Action 与异步操作","/document/pinia/guide/action","document/19.pinia/01.guide/05.action",{"title":728,"path":729,"stem":730},"组合、TypeScript 与插件","/document/pinia/guide/advanced","document/19.pinia/01.guide/06.advanced",{"title":732,"path":733,"stem":734,"children":735,"page":50},"Vite","/document/vite","document/20.vite",[736],{"title":732,"path":737,"stem":738,"children":739,"icon":41},"/document/vite/guide","document/20.vite/01.guide/01.index",[740,742,746,750,754,758],{"title":741,"path":737,"stem":738},"Vite 简介与安装",{"title":743,"path":744,"stem":745},"基础配置","/document/vite/guide/config","document/20.vite/01.guide/02.config",{"title":747,"path":748,"stem":749},"常用插件","/document/vite/guide/plugins","document/20.vite/01.guide/03.plugins",{"title":751,"path":752,"stem":753},"环境变量与模式","/document/vite/guide/env","document/20.vite/01.guide/04.env",{"title":755,"path":756,"stem":757},"依赖预构建","/document/vite/guide/optimize-deps","document/20.vite/01.guide/05.optimize-deps",{"title":759,"path":760,"stem":761},"构建与部署","/document/vite/guide/build-deploy","document/20.vite/01.guide/06.build-deploy",{"title":763,"path":764,"stem":765,"children":766,"page":50},"Nuxt","/document/nuxt","document/21.nuxt",[767],{"title":768,"path":769,"stem":770,"children":771,"icon":41},"Nuxt.js","/document/nuxt/guide","document/21.nuxt/01.guide/01.index",[772,774,778,782,786,790],{"title":773,"path":769,"stem":770},"Nuxt.js 简介与安装",{"title":775,"path":776,"stem":777},"目录约定与自动导入","/document/nuxt/guide/directory-and-auto-imports","document/21.nuxt/01.guide/02.directory-and-auto-imports",{"title":779,"path":780,"stem":781},"文件路由与导航","/document/nuxt/guide/routing","document/21.nuxt/01.guide/03.routing",{"title":783,"path":784,"stem":785},"数据获取","/document/nuxt/guide/data-fetching","document/21.nuxt/01.guide/04.data-fetching",{"title":787,"path":788,"stem":789},"状态管理","/document/nuxt/guide/state-management","document/21.nuxt/01.guide/05.state-management",{"title":791,"path":792,"stem":793},"配置与部署","/document/nuxt/guide/config-and-deploy","document/21.nuxt/01.guide/06.config-and-deploy",{"title":795,"path":796,"stem":797,"children":798,"page":50},"Npm","/document/npm","document/22.npm",[799],{"title":800,"path":801,"stem":802,"children":803,"icon":830},"NPM","/document/npm/guide","document/22.npm/01.guide/01.index",[804,806,810,814,818,822,826],{"title":805,"path":801,"stem":802},"NPM 入门",{"title":807,"path":808,"stem":809},"package.json 详解","/document/npm/guide/package-json","document/22.npm/01.guide/02.package-json",{"title":811,"path":812,"stem":813},"安装命令与版本","/document/npm/guide/install-commands","document/22.npm/01.guide/03.install-commands",{"title":815,"path":816,"stem":817},"scripts 与 npx","/document/npm/guide/scripts-and-npx","document/22.npm/01.guide/04.scripts-and-npx",{"title":819,"path":820,"stem":821},"发布包与镜像源","/document/npm/guide/publish-and-registry","document/22.npm/01.guide/05.publish-and-registry",{"title":823,"path":824,"stem":825},"lock 文件与清理","/document/npm/guide/lock-and-clean","document/22.npm/01.guide/06.lock-and-clean",{"title":827,"path":828,"stem":829},"Yarn 与 pnpm","/document/npm/guide/yarn-and-pnpm","document/22.npm/01.guide/07.yarn-and-pnpm","i-simple-icons-npm",{"title":832,"icon":833,"path":834,"stem":835,"children":836,"page":50},"Handlebars","i-simple-icons-handlebarsdotjs","/document/handlebars","document/23.handlebars",[837],{"title":838,"path":839,"stem":840,"children":841},"Handlebars 简介","/document/handlebars/guide","document/23.handlebars/01.guide/01.index",[842,843,847,851,855,859],{"title":838,"path":839,"stem":840},{"title":844,"path":845,"stem":846},"基本语法","/document/handlebars/guide/syntax","document/23.handlebars/01.guide/02.syntax",{"title":848,"path":849,"stem":850},"内置辅助函数","/document/handlebars/guide/builtins","document/23.handlebars/01.guide/03.builtins",{"title":852,"path":853,"stem":854},"模板复用","/document/handlebars/guide/partials","document/23.handlebars/01.guide/04.partials",{"title":856,"path":857,"stem":858},"自定义 Helpers","/document/handlebars/guide/helpers","document/23.handlebars/01.guide/05.helpers",{"title":860,"path":861,"stem":862},"预编译与运行时","/document/handlebars/guide/runtime","document/23.handlebars/01.guide/06.runtime",{"title":864,"icon":865,"path":866,"stem":867,"children":868,"page":50},"Plop","i-simple-icons-nodedotjs","/document/plop","document/24.plop",[869],{"title":870,"path":871,"stem":872,"children":873},"Plop 简介","/document/plop/guide","document/24.plop/01.guide/01.index",[874,875,879,883,887,891,895],{"title":870,"path":871,"stem":872},{"title":876,"path":877,"stem":878},"第一个生成器","/document/plop/guide/plopfile","document/24.plop/01.guide/02.plopfile",{"title":880,"path":881,"stem":882},"交互式询问","/document/plop/guide/prompts","document/24.plop/01.guide/03.prompts",{"title":884,"path":885,"stem":886},"核心动作","/document/plop/guide/actions","document/24.plop/01.guide/04.actions",{"title":888,"path":889,"stem":890},"模板文件组织","/document/plop/guide/templates","document/24.plop/01.guide/05.templates",{"title":892,"path":893,"stem":894},"Helper 扩展","/document/plop/guide/helpers","document/24.plop/01.guide/06.helpers",{"title":896,"path":897,"stem":898},"组件生成实战","/document/plop/guide/practice","document/24.plop/01.guide/07.practice",{"title":900,"icon":901,"path":902,"stem":903,"children":904,"page":50},"Rollup","i-simple-icons-rollupdotjs","/document/rollup","document/25.rollup",[905],{"title":906,"path":907,"stem":908,"children":909},"Rollup 简介","/document/rollup/guide","document/25.rollup/01.guide/01.index",[910,911,914,918,921,925],{"title":906,"path":907,"stem":908},{"title":743,"path":912,"stem":913},"/document/rollup/guide/config","document/25.rollup/01.guide/02.config",{"title":915,"path":916,"stem":917},"输出格式","/document/rollup/guide/formats","document/25.rollup/01.guide/03.formats",{"title":747,"path":919,"stem":920},"/document/rollup/guide/plugins","document/25.rollup/01.guide/04.plugins",{"title":922,"path":923,"stem":924},"Tree Shaking","/document/rollup/guide/tree-shaking","document/25.rollup/01.guide/05.tree-shaking",{"title":926,"path":927,"stem":928},"打包工具库实战","/document/rollup/guide/library","document/25.rollup/01.guide/06.library",{"title":930,"icon":865,"path":931,"stem":932,"children":933,"page":50},"Snabbdom","/document/snabbdom","document/26.snabbdom",[934],{"title":935,"path":936,"stem":937,"children":938},"Snabbdom 简介","/document/snabbdom/guide","document/26.snabbdom/01.guide/01.index",[939,940,944,948,952,956,960],{"title":935,"path":936,"stem":937},{"title":941,"path":942,"stem":943},"h 函数","/document/snabbdom/guide/h","document/26.snabbdom/01.guide/02.h",{"title":945,"path":946,"stem":947},"模块机制","/document/snabbdom/guide/modules","document/26.snabbdom/01.guide/03.modules",{"title":949,"path":950,"stem":951},"patch 渲染与更新","/document/snabbdom/guide/patch","document/26.snabbdom/01.guide/04.patch",{"title":953,"path":954,"stem":955},"key 的作用","/document/snabbdom/guide/key","document/26.snabbdom/01.guide/05.key",{"title":957,"path":958,"stem":959},"Diff 原理","/document/snabbdom/guide/diff","document/26.snabbdom/01.guide/06.diff",{"title":961,"path":962,"stem":963},"手写迷你虚拟 DOM","/document/snabbdom/guide/practice","document/26.snabbdom/01.guide/07.practice",{"title":965,"icon":966,"path":967,"stem":968,"children":969,"page":50},"Vercel","i-simple-icons-vercel","/document/vercel","document/27.vercel",[970],{"title":971,"path":972,"stem":973,"children":974},"Vercel 简介","/document/vercel/guide","document/27.vercel/01.guide/01.index",[975,976,980,984,988,992,996],{"title":971,"path":972,"stem":973},{"title":977,"path":978,"stem":979},"Vercel CLI","/document/vercel/guide/cli","document/27.vercel/01.guide/02.cli",{"title":981,"path":982,"stem":983},"项目设置与环境变量","/document/vercel/guide/settings","document/27.vercel/01.guide/03.settings",{"title":985,"path":986,"stem":987},"预览部署与回滚","/document/vercel/guide/preview","document/27.vercel/01.guide/04.preview",{"title":989,"path":990,"stem":991},"自定义域名","/document/vercel/guide/domain","document/27.vercel/01.guide/05.domain",{"title":993,"path":994,"stem":995},"vercel.json 配置","/document/vercel/guide/vercel-json","document/27.vercel/01.guide/06.vercel-json",{"title":997,"path":998,"stem":999},"Serverless Functions","/document/vercel/guide/serverless","document/27.vercel/01.guide/07.serverless",{"title":1001,"icon":1002,"path":1003,"stem":1004,"children":1005,"page":50},"ECharts","i-simple-icons-apacheecharts","/document/echarts","document/28.echarts",[1006],{"title":1007,"path":1008,"stem":1009,"children":1010},"ECharts 简介","/document/echarts/guide","document/28.echarts/01.guide/01.index",[1011,1012,1016,1020,1024,1028,1032],{"title":1007,"path":1008,"stem":1009},{"title":1013,"path":1014,"stem":1015},"核心配置项","/document/echarts/guide/option","document/28.echarts/01.guide/02.option",{"title":1017,"path":1018,"stem":1019},"常用图表类型","/document/echarts/guide/charts","document/28.echarts/01.guide/03.charts",{"title":1021,"path":1022,"stem":1023},"样式与主题","/document/echarts/guide/style","document/28.echarts/01.guide/04.style",{"title":1025,"path":1026,"stem":1027},"交互与事件","/document/echarts/guide/interaction","document/28.echarts/01.guide/05.interaction",{"title":1029,"path":1030,"stem":1031},"动态数据","/document/echarts/guide/data","document/28.echarts/01.guide/06.data",{"title":1033,"path":1034,"stem":1035},"Vue3 实战","/document/echarts/guide/vue","document/28.echarts/01.guide/07.vue",{"title":1037,"icon":1038,"path":1039,"stem":1040,"children":1041,"page":50},"D3","i-simple-icons-d3dotjs","/document/d3","document/29.d3",[1042],{"title":1043,"path":1044,"stem":1045,"children":1046},"D3 简介","/document/d3/guide","document/29.d3/01.guide/01.index",[1047,1048,1052,1056,1060,1064,1068,1072],{"title":1043,"path":1044,"stem":1045},{"title":1049,"path":1050,"stem":1051},"选择集与数据绑定","/document/d3/guide/selection","document/29.d3/01.guide/02.selection",{"title":1053,"path":1054,"stem":1055},"比例尺","/document/d3/guide/scale","document/29.d3/01.guide/03.scale",{"title":1057,"path":1058,"stem":1059},"坐标轴","/document/d3/guide/axis","document/29.d3/01.guide/04.axis",{"title":1061,"path":1062,"stem":1063},"图形生成器","/document/d3/guide/shape","document/29.d3/01.guide/05.shape",{"title":1065,"path":1066,"stem":1067},"过渡动画","/document/d3/guide/transition","document/29.d3/01.guide/06.transition",{"title":1069,"path":1070,"stem":1071},"交互与缩放","/document/d3/guide/interaction","document/29.d3/01.guide/07.interaction",{"title":1033,"path":1073,"stem":1074},"/document/d3/guide/vue","document/29.d3/01.guide/08.vue",{"title":1076,"icon":1077,"path":1078,"stem":1079,"children":1080,"page":50},"Three.js","i-simple-icons-threedotjs","/document/threejs","document/30.threejs",[1081],{"title":1082,"path":1083,"stem":1084,"children":1085},"Three.js 简介","/document/threejs/guide","document/30.threejs/01.guide/01.index",[1086,1087,1091,1095,1099,1103,1107],{"title":1082,"path":1083,"stem":1084},{"title":1088,"path":1089,"stem":1090},"几何体与材质","/document/threejs/guide/geometry","document/30.threejs/01.guide/02.geometry",{"title":1092,"path":1093,"stem":1094},"灯光与阴影","/document/threejs/guide/light","document/30.threejs/01.guide/03.light",{"title":1096,"path":1097,"stem":1098},"相机与坐标系","/document/threejs/guide/camera","document/30.threejs/01.guide/04.camera",{"title":1100,"path":1101,"stem":1102},"动画与渲染循环","/document/threejs/guide/animation","document/30.threejs/01.guide/05.animation",{"title":1104,"path":1105,"stem":1106},"轨道控制器","/document/threejs/guide/control","document/30.threejs/01.guide/06.control",{"title":1033,"path":1108,"stem":1109},"/document/threejs/guide/vue","document/30.threejs/01.guide/07.vue",{"title":1111,"icon":865,"path":1112,"stem":1113,"children":1114,"page":50},"Node.js","/document/nodejs","document/32.nodejs",[1115],{"title":1116,"path":1117,"stem":1118,"children":1119},"Node.js 简介","/document/nodejs/guide","document/32.nodejs/01.guide/01.index",[1120,1121,1125,1129,1133,1137,1141,1145],{"title":1116,"path":1117,"stem":1118},{"title":1122,"path":1123,"stem":1124},"模块化","/document/nodejs/guide/module","document/32.nodejs/01.guide/02.module",{"title":1126,"path":1127,"stem":1128},"fs 文件系统","/document/nodejs/guide/fs","document/32.nodejs/01.guide/03.fs",{"title":1130,"path":1131,"stem":1132},"path 路径模块","/document/nodejs/guide/path","document/32.nodejs/01.guide/04.path",{"title":1134,"path":1135,"stem":1136},"http 搭建服务器","/document/nodejs/guide/http","document/32.nodejs/01.guide/05.http",{"title":1138,"path":1139,"stem":1140},"事件循环","/document/nodejs/guide/event-loop","document/32.nodejs/01.guide/06.event-loop",{"title":1142,"path":1143,"stem":1144},"process 与环境变量","/document/nodejs/guide/process","document/32.nodejs/01.guide/07.process",{"title":1146,"path":1147,"stem":1148},"events 事件模块","/document/nodejs/guide/events","document/32.nodejs/01.guide/08.events",{"title":1150,"icon":1151,"path":1152,"stem":1153,"children":1154,"page":50},"Express","i-simple-icons-express","/document/express","document/33.express",[1155],{"title":1156,"path":1157,"stem":1158,"children":1159},"Express 简介","/document/express/guide","document/33.express/01.guide/01.index",[1160,1161,1165,1169,1173,1177],{"title":1156,"path":1157,"stem":1158},{"title":1162,"path":1163,"stem":1164},"路由","/document/express/guide/routing","document/33.express/01.guide/02.routing",{"title":1166,"path":1167,"stem":1168},"中间件","/document/express/guide/middleware","document/33.express/01.guide/03.middleware",{"title":1170,"path":1171,"stem":1172},"请求与响应","/document/express/guide/request-response","document/33.express/01.guide/04.request-response",{"title":1174,"path":1175,"stem":1176},"错误处理","/document/express/guide/error-handling","document/33.express/01.guide/05.error-handling",{"title":1178,"path":1179,"stem":1180},"RESTful 实战","/document/express/guide/restful-api","document/33.express/01.guide/06.restful-api",{"title":1182,"icon":1183,"path":1184,"stem":1185,"children":1186,"page":50},"Koa","i-simple-icons-koa","/document/koa","document/34.koa",[1187],{"title":1188,"path":1189,"stem":1190,"children":1191},"Koa 简介","/document/koa/guide","document/34.koa/01.guide/01.index",[1192,1193,1197,1201,1204,1208],{"title":1188,"path":1189,"stem":1190},{"title":1194,"path":1195,"stem":1196},"Context 上下文","/document/koa/guide/context","document/34.koa/01.guide/02.context",{"title":1198,"path":1199,"stem":1200},"中间件与洋葱模型","/document/koa/guide/middleware","document/34.koa/01.guide/03.middleware",{"title":1162,"path":1202,"stem":1203},"/document/koa/guide/routing","document/34.koa/01.guide/04.routing",{"title":1205,"path":1206,"stem":1207},"请求体与错误处理","/document/koa/guide/body-and-error","document/34.koa/01.guide/05.body-and-error",{"title":1209,"path":1210,"stem":1211},"RESTful 接口实战","/document/koa/guide/restful-api","document/34.koa/01.guide/06.restful-api",{"title":1213,"icon":1214,"path":1215,"stem":1216,"children":1217,"page":50},"Egg.js","i-lucide-egg","/document/egg","document/35.egg",[1218],{"title":1219,"path":1220,"stem":1221,"children":1222},"Egg.js 简介","/document/egg/guide","document/35.egg/01.guide/01.index",[1223,1224,1228,1232,1236,1240],{"title":1219,"path":1220,"stem":1221},{"title":1225,"path":1226,"stem":1227},"路由与 Controller","/document/egg/guide/router-controller","document/35.egg/01.guide/02.router-controller",{"title":1229,"path":1230,"stem":1231},"Service 业务逻辑","/document/egg/guide/service","document/35.egg/01.guide/03.service",{"title":1233,"path":1234,"stem":1235},"配置与中间件","/document/egg/guide/config-middleware","document/35.egg/01.guide/04.config-middleware",{"title":1237,"path":1238,"stem":1239},"插件与扩展","/document/egg/guide/plugin-extend","document/35.egg/01.guide/05.plugin-extend",{"title":1209,"path":1241,"stem":1242},"/document/egg/guide/restful-api","document/35.egg/01.guide/06.restful-api",{"title":1244,"icon":1245,"path":1246,"stem":1247,"children":1248,"page":50},"Docker","i-simple-icons-docker","/document/docker","document/36.docker",[1249],{"title":1250,"path":1251,"stem":1252,"children":1253},"Docker 简介","/document/docker/guide","document/36.docker/01.guide/01.index",[1254,1255,1259,1263,1267],{"title":1250,"path":1251,"stem":1252},{"title":1256,"path":1257,"stem":1258},"镜像与容器","/document/docker/guide/image-container","document/36.docker/01.guide/02.image-container",{"title":1260,"path":1261,"stem":1262},"数据卷","/document/docker/guide/volume","document/36.docker/01.guide/03.volume",{"title":1264,"path":1265,"stem":1266},"Dockerfile","/document/docker/guide/dockerfile","document/36.docker/01.guide/04.dockerfile",{"title":1268,"path":1269,"stem":1270},"Docker Compose","/document/docker/guide/docker-compose","document/36.docker/01.guide/05.docker-compose",{"title":1272,"icon":1273,"path":1274,"stem":1275,"children":1276,"page":50},"MySQL","i-simple-icons-mysql","/document/mysql","document/37.mysql",[1277],{"title":1278,"path":1279,"stem":1280,"children":1281},"MySQL 简介","/document/mysql/guide","document/37.mysql/01.guide/01.index",[1282,1283,1287,1291,1295,1299,1303],{"title":1278,"path":1279,"stem":1280},{"title":1284,"path":1285,"stem":1286},"增删改查","/document/mysql/guide/crud","document/37.mysql/01.guide/02.crud",{"title":1288,"path":1289,"stem":1290},"条件查询与分页","/document/mysql/guide/query","document/37.mysql/01.guide/03.query",{"title":1292,"path":1293,"stem":1294},"数据类型与约束","/document/mysql/guide/data-type","document/37.mysql/01.guide/04.data-type",{"title":1296,"path":1297,"stem":1298},"多表关联查询","/document/mysql/guide/join","document/37.mysql/01.guide/05.join",{"title":1300,"path":1301,"stem":1302},"Node.js 操作 MySQL","/document/mysql/guide/nodejs","document/37.mysql/01.guide/06.nodejs",{"title":1304,"path":1305,"stem":1306},"索引与优化","/document/mysql/guide/optimize","document/37.mysql/01.guide/07.optimize",{"title":1308,"icon":1309,"path":1310,"stem":1311,"children":1312,"page":50},"MongoDB","i-simple-icons-mongodb","/document/mongodb","document/38.mongodb",[1313],{"title":1314,"path":1315,"stem":1316,"children":1317},"MongoDB 简介","/document/mongodb/guide","document/38.mongodb/01.guide/01.index",[1318,1319,1322,1326,1330,1334,1338,1342],{"title":1314,"path":1315,"stem":1316},{"title":1284,"path":1320,"stem":1321},"/document/mongodb/guide/crud","document/38.mongodb/01.guide/02.crud",{"title":1323,"path":1324,"stem":1325},"条件查询","/document/mongodb/guide/query","document/38.mongodb/01.guide/03.query",{"title":1327,"path":1328,"stem":1329},"文档与数据类型","/document/mongodb/guide/document","document/38.mongodb/01.guide/04.document",{"title":1331,"path":1332,"stem":1333},"Node.js 操作 MongoDB","/document/mongodb/guide/nodejs","document/38.mongodb/01.guide/05.nodejs",{"title":1335,"path":1336,"stem":1337},"Mongoose","/document/mongodb/guide/mongoose","document/38.mongodb/01.guide/06.mongoose",{"title":1339,"path":1340,"stem":1341},"索引","/document/mongodb/guide/optimize","document/38.mongodb/01.guide/07.optimize",{"title":1343,"path":1344,"stem":1345},"聚合管道","/document/mongodb/guide/aggregate","document/38.mongodb/01.guide/08.aggregate",{"title":1347,"icon":1348,"path":1349,"stem":1350,"children":1351,"page":50},"GraphQL","i-simple-icons-graphql","/document/graphql","document/39.graphql",[1352],{"title":1353,"path":1354,"stem":1355,"children":1356},"GraphQL 简介","/document/graphql/guide","document/39.graphql/01.guide/01.index",[1357,1358,1362,1366,1370,1374],{"title":1353,"path":1354,"stem":1355},{"title":1359,"path":1360,"stem":1361},"类型系统","/document/graphql/guide/schema","document/39.graphql/01.guide/02.schema",{"title":1363,"path":1364,"stem":1365},"查询进阶","/document/graphql/guide/query","document/39.graphql/01.guide/03.query",{"title":1367,"path":1368,"stem":1369},"Mutation 增删改","/document/graphql/guide/mutation","document/39.graphql/01.guide/04.mutation",{"title":1371,"path":1372,"stem":1373},"Express 集成","/document/graphql/guide/express","document/39.graphql/01.guide/05.express",{"title":1375,"path":1376,"stem":1377},"前端调用","/document/graphql/guide/client","document/39.graphql/01.guide/06.client",{"title":1379,"icon":1380,"path":1381,"stem":1382,"children":1383,"page":50},"Vue2 源码","i-simple-icons-vuedotjs","/document/source-vue2","document/40.source-vue2",[1384],{"title":1385,"path":1386,"stem":1387,"children":1388},"Vue2 源码简介","/document/source-vue2/guide","document/40.source-vue2/01.guide/01.index",[1389,1390,1394,1398,1402,1406,1410,1414],{"title":1385,"path":1386,"stem":1387},{"title":1391,"path":1392,"stem":1393},"初始化流程","/document/source-vue2/guide/init","document/40.source-vue2/01.guide/02.init",{"title":1395,"path":1396,"stem":1397},"响应式原理","/document/source-vue2/guide/reactive","document/40.source-vue2/01.guide/03.reactive",{"title":1399,"path":1400,"stem":1401},"Dep 与 Watcher","/document/source-vue2/guide/dep-watcher","document/40.source-vue2/01.guide/04.dep-watcher",{"title":1403,"path":1404,"stem":1405},"异步更新与 nextTick","/document/source-vue2/guide/nexttick","document/40.source-vue2/01.guide/05.nexttick",{"title":1407,"path":1408,"stem":1409},"虚拟 DOM 与 patch","/document/source-vue2/guide/vnode-patch","document/40.source-vue2/01.guide/06.vnode-patch",{"title":1411,"path":1412,"stem":1413},"模板编译","/document/source-vue2/guide/compile","document/40.source-vue2/01.guide/07.compile",{"title":1415,"path":1416,"stem":1417},"computed 与 watch 原理","/document/source-vue2/guide/computed-watch","document/40.source-vue2/01.guide/08.computed-watch",{"title":1419,"icon":1380,"path":1420,"stem":1421,"children":1422,"page":50},"Vue3 源码","/document/source-vue3","document/41.source-vue3",[1423],{"title":1424,"path":1425,"stem":1426,"children":1427},"Vue3 源码简介","/document/source-vue3/guide","document/41.source-vue3/01.guide/01.index",[1428,1429,1433,1437,1441,1445,1449,1452],{"title":1424,"path":1425,"stem":1426},{"title":1430,"path":1431,"stem":1432},"创建与挂载","/document/source-vue3/guide/create-app","document/41.source-vue3/01.guide/02.create-app",{"title":1434,"path":1435,"stem":1436},"Proxy 响应式","/document/source-vue3/guide/reactive","document/41.source-vue3/01.guide/03.reactive",{"title":1438,"path":1439,"stem":1440},"effect 与依赖收集","/document/source-vue3/guide/effect","document/41.source-vue3/01.guide/04.effect",{"title":1442,"path":1443,"stem":1444},"ref 与 computed","/document/source-vue3/guide/ref-computed","document/41.source-vue3/01.guide/05.ref-computed",{"title":1446,"path":1447,"stem":1448},"调度器与 nextTick","/document/source-vue3/guide/scheduler-nexttick","document/41.source-vue3/01.guide/06.scheduler-nexttick",{"title":1407,"path":1450,"stem":1451},"/document/source-vue3/guide/vnode-patch","document/41.source-vue3/01.guide/07.vnode-patch",{"title":1411,"path":1453,"stem":1454},"/document/source-vue3/guide/compile","document/41.source-vue3/01.guide/08.compile",{"title":1456,"icon":1457,"path":1458,"stem":1459,"children":1460,"page":50},"性能优化","i-lucide-zap","/document/performance","document/42.performance",[1461],{"title":1462,"path":1463,"stem":1464,"children":1465},"性能优化简介","/document/performance/guide","document/42.performance/01.guide/01.index",[1466,1467,1471,1475,1479,1483],{"title":1462,"path":1463,"stem":1464},{"title":1468,"path":1469,"stem":1470},"加载优化","/document/performance/guide/loading","document/42.performance/01.guide/02.loading",{"title":1472,"path":1473,"stem":1474},"渲染优化","/document/performance/guide/rendering","document/42.performance/01.guide/03.rendering",{"title":1476,"path":1477,"stem":1478},"缓存策略","/document/performance/guide/cache","document/42.performance/01.guide/04.cache",{"title":1480,"path":1481,"stem":1482},"构建产物优化","/document/performance/guide/build","document/42.performance/01.guide/05.build",{"title":1484,"path":1485,"stem":1486},"性能指标与工具","/document/performance/guide/metrics","document/42.performance/01.guide/06.metrics",{"title":1488,"icon":1489,"path":1490,"stem":1491,"children":1492,"page":50},"前端监控","i-lucide-activity","/document/monitor","document/43.monitor",[1493],{"title":1494,"path":1495,"stem":1496,"children":1497},"前端监控简介","/document/monitor/guide","document/43.monitor/01.guide/01.index",[1498,1499,1503,1507,1511,1515],{"title":1494,"path":1495,"stem":1496},{"title":1500,"path":1501,"stem":1502},"错误采集","/document/monitor/guide/error","document/43.monitor/01.guide/02.error",{"title":1504,"path":1505,"stem":1506},"埋点与上报","/document/monitor/guide/tracking","document/43.monitor/01.guide/03.tracking",{"title":1508,"path":1509,"stem":1510},"性能数据上报","/document/monitor/guide/performance-data","document/43.monitor/01.guide/04.performance-data",{"title":1512,"path":1513,"stem":1514},"Sentry 实践","/document/monitor/guide/sentry","document/43.monitor/01.guide/05.sentry",{"title":1516,"path":1517,"stem":1518},"日志与告警","/document/monitor/guide/logging","document/43.monitor/01.guide/06.logging",{"id":1520,"title":1521,"body":1522,"description":3696,"extension":3697,"links":3698,"meta":3699,"navigation":3700,"path":1435,"seo":3701,"stem":1436,"__hash__":3702},"docs/document/41.source-vue3/01.guide/03.reactive.md","Proxy 响应式原理：reactive 的实现",{"type":1523,"value":1524,"toc":3685},"minimal",[1525,1530,1544,1558,1595,1615,1618,1622,1635,1650,1991,2002,2022,2040,2042,2046,2060,2073,2365,2376,2394,2662,2665,2703,2709,2711,2715,2718,2723,2736,2812,2815,2823,2828,2833,2886,2888,2892,2914,2929,3142,3162,3172,3174,3178,3184,3189,3196,3223,3228,3233,3301,3311,3323,3325,3329,3380,3382,3386,3391,3404,3409,3412,3420,3431,3436,3439,3444,3457,3459,3463,3473,3653,3667,3669,3681],[1526,1527,1529],"h2",{"id":1528},"引言","🎯 引言",[1531,1532,1533,1534,1538,1539,1543],"p",{},"在 ",[1535,1536,1537],"a",{"href":671},"Vue3 使用课程","里，我们每天都在用 ",[1540,1541,1542],"code",{},"reactive"," 创建响应式对象：改一个字段，模板自动更新。这个「自动」是怎么来的？数据变了，Vue 又是怎么知道该更新哪里的？",[1531,1545,1546,1547,1550,1551,1554,1555,1557],{},"答案就是 ES6 的 ",[1540,1548,1549],{},"Proxy","。本篇我们打开 ",[1540,1552,1553],{},"packages/reactivity"," 的源码，看看 ",[1540,1556,1542],{}," 内部到底做了什么。学完之后，你能够：",[1559,1560,1561,1576,1582,1585],"ul",{},[1562,1563,1564,1565,1567,1568,1571,1572,1575],"li",{},"说清楚 ",[1540,1566,1549],{}," 的 ",[1540,1569,1570],{},"get"," / ",[1540,1573,1574],{},"set"," 是如何拦截对象读写的。",[1562,1577,1578,1579,1581],{},"理解 ",[1540,1580,1542],{}," 源码里 WeakMap 缓存和递归代理这两个设计细节。",[1562,1583,1584],{},"说出 Vue3 相对 Vue2 响应式方案解决了哪些局限。",[1562,1586,1587,1588,1590,1591,1594],{},"知道 ",[1540,1589,1542],{}," 自身的限制，以及为什么还需要 ",[1540,1592,1593],{},"ref","。",[1531,1596,1597,1598,1602,1603,1606,1607,1610,1611,1614],{},"本篇源码基于 ",[1599,1600,1601],"strong",{},"Vue 3.5.x","（GitHub vuejs/core monorepo），主要涉及 ",[1540,1604,1605],{},"packages/reactivity/src/reactive.ts"," 和 ",[1540,1608,1609],{},"packages/reactivity/src/baseHandlers.ts","。示例代码可以直接用 ",[1599,1612,1613],{},"Node.js v22"," 运行。",[1616,1617],"hr",{},[1526,1619,1621],{"id":1620},"proxy-基础回顾","🧱 Proxy 基础回顾",[1531,1623,1624,1625,1627,1628,1630,1631,1634],{},"要读懂 ",[1540,1626,1542],{},"，先要认识它的基础 ",[1540,1629,1549],{},"。这一节我们只解决一个问题：Proxy 是什么，它能干什么？",[1599,1632,1633],{},"Proxy 可以给对象包一层「代理」","：之后外界对对象的读写都不直接作用于原对象，而是先经过代理层，我们可以在代理层里插入自己的逻辑（比如打印一句话），再把操作转交给原对象。",[1531,1636,1637,1638,1641,1642,1645,1646,1649],{},"这种在读写中间插入逻辑的做法，源码里叫",[1599,1639,1640],{},"拦截","；定义了各种拦截方法的对象，叫",[1599,1643,1644],{},"拦截器","（handler）。基本用法是 ",[1540,1647,1648],{},"new Proxy(target, handler)","：",[1651,1652,1658],"pre",{"className":1653,"code":1654,"filename":1655,"language":1656,"meta":1657,"style":1657},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const user = { name: 'noxussj' }; // target：被代理的原始对象\n\nconst proxyUser = new Proxy(user, {\n    // 有人读属性时，先走这里\n    get(target, key) {\n        console.log('读取了', key);\n        return target[key]; // 转交给原始对象，正常返回\n    },\n    // 有人改属性时，先走这里\n    set(target, key, value) {\n        console.log('修改了', key, '为', value);\n        target[key] = value; // 转交给原始对象，正常修改\n        return true; // 告诉外界：赋值成功\n    },\n});\n\nproxyUser.name; // 打印：读取了 name\nproxyUser.name = '小明'; // 打印：修改了 name 为 小明\n","demo.js","js","",[1540,1659,1660,1704,1711,1737,1743,1766,1796,1821,1827,1833,1856,1895,1917,1931,1936,1946,1951,1967],{"__ignoreMap":1657},[1661,1662,1665,1669,1673,1677,1680,1684,1687,1690,1694,1697,1700],"span",{"class":1663,"line":1664},"line",1,[1661,1666,1668],{"class":1667},"s50WR","const",[1661,1670,1672],{"class":1671},"sndM8"," user ",[1661,1674,1676],{"class":1675},"s86vT","=",[1661,1678,1679],{"class":1675}," {",[1661,1681,1683],{"class":1682},"sd2Uz"," name",[1661,1685,1686],{"class":1675},":",[1661,1688,1689],{"class":1675}," '",[1661,1691,1693],{"class":1692},"sIEYB","noxussj",[1661,1695,1696],{"class":1675},"'",[1661,1698,1699],{"class":1675}," };",[1661,1701,1703],{"class":1702},"syuKq"," // target：被代理的原始对象\n",[1661,1705,1707],{"class":1663,"line":1706},2,[1661,1708,1710],{"emptyLinePlaceholder":1709},true,"\n",[1661,1712,1714,1716,1719,1721,1724,1728,1731,1734],{"class":1663,"line":1713},3,[1661,1715,1668],{"class":1667},[1661,1717,1718],{"class":1671}," proxyUser ",[1661,1720,1676],{"class":1675},[1661,1722,1723],{"class":1675}," new",[1661,1725,1727],{"class":1726},"swgpB"," Proxy",[1661,1729,1730],{"class":1671},"(user",[1661,1732,1733],{"class":1675},",",[1661,1735,1736],{"class":1675}," {\n",[1661,1738,1740],{"class":1663,"line":1739},4,[1661,1741,1742],{"class":1702},"    // 有人读属性时，先走这里\n",[1661,1744,1746,1749,1752,1756,1758,1761,1764],{"class":1663,"line":1745},5,[1661,1747,1748],{"class":1682},"    get",[1661,1750,1751],{"class":1675},"(",[1661,1753,1755],{"class":1754},"sK9QF","target",[1661,1757,1733],{"class":1675},[1661,1759,1760],{"class":1754}," key",[1661,1762,1763],{"class":1675},")",[1661,1765,1736],{"class":1675},[1661,1767,1769,1772,1775,1778,1780,1782,1785,1787,1789,1791,1793],{"class":1663,"line":1768},6,[1661,1770,1771],{"class":1671},"        console",[1661,1773,1774],{"class":1675},".",[1661,1776,1777],{"class":1726},"log",[1661,1779,1751],{"class":1682},[1661,1781,1696],{"class":1675},[1661,1783,1784],{"class":1692},"读取了",[1661,1786,1696],{"class":1675},[1661,1788,1733],{"class":1675},[1661,1790,1760],{"class":1671},[1661,1792,1763],{"class":1682},[1661,1794,1795],{"class":1675},";\n",[1661,1797,1799,1803,1806,1809,1812,1815,1818],{"class":1663,"line":1798},7,[1661,1800,1802],{"class":1801},"s8pZq","        return",[1661,1804,1805],{"class":1671}," target",[1661,1807,1808],{"class":1682},"[",[1661,1810,1811],{"class":1671},"key",[1661,1813,1814],{"class":1682},"]",[1661,1816,1817],{"class":1675},";",[1661,1819,1820],{"class":1702}," // 转交给原始对象，正常返回\n",[1661,1822,1824],{"class":1663,"line":1823},8,[1661,1825,1826],{"class":1675},"    },\n",[1661,1828,1830],{"class":1663,"line":1829},9,[1661,1831,1832],{"class":1702},"    // 有人改属性时，先走这里\n",[1661,1834,1836,1839,1841,1843,1845,1847,1849,1852,1854],{"class":1663,"line":1835},10,[1661,1837,1838],{"class":1682},"    set",[1661,1840,1751],{"class":1675},[1661,1842,1755],{"class":1754},[1661,1844,1733],{"class":1675},[1661,1846,1760],{"class":1754},[1661,1848,1733],{"class":1675},[1661,1850,1851],{"class":1754}," value",[1661,1853,1763],{"class":1675},[1661,1855,1736],{"class":1675},[1661,1857,1859,1861,1863,1865,1867,1869,1872,1874,1876,1878,1880,1882,1885,1887,1889,1891,1893],{"class":1663,"line":1858},11,[1661,1860,1771],{"class":1671},[1661,1862,1774],{"class":1675},[1661,1864,1777],{"class":1726},[1661,1866,1751],{"class":1682},[1661,1868,1696],{"class":1675},[1661,1870,1871],{"class":1692},"修改了",[1661,1873,1696],{"class":1675},[1661,1875,1733],{"class":1675},[1661,1877,1760],{"class":1671},[1661,1879,1733],{"class":1675},[1661,1881,1689],{"class":1675},[1661,1883,1884],{"class":1692},"为",[1661,1886,1696],{"class":1675},[1661,1888,1733],{"class":1675},[1661,1890,1851],{"class":1671},[1661,1892,1763],{"class":1682},[1661,1894,1795],{"class":1675},[1661,1896,1898,1901,1903,1905,1908,1910,1912,1914],{"class":1663,"line":1897},12,[1661,1899,1900],{"class":1671},"        target",[1661,1902,1808],{"class":1682},[1661,1904,1811],{"class":1671},[1661,1906,1907],{"class":1682},"] ",[1661,1909,1676],{"class":1675},[1661,1911,1851],{"class":1671},[1661,1913,1817],{"class":1675},[1661,1915,1916],{"class":1702}," // 转交给原始对象，正常修改\n",[1661,1918,1920,1922,1926,1928],{"class":1663,"line":1919},13,[1661,1921,1802],{"class":1801},[1661,1923,1925],{"class":1924},"sPKOg"," true",[1661,1927,1817],{"class":1675},[1661,1929,1930],{"class":1702}," // 告诉外界：赋值成功\n",[1661,1932,1934],{"class":1663,"line":1933},14,[1661,1935,1826],{"class":1675},[1661,1937,1939,1942,1944],{"class":1663,"line":1938},15,[1661,1940,1941],{"class":1675},"}",[1661,1943,1763],{"class":1671},[1661,1945,1795],{"class":1675},[1661,1947,1949],{"class":1663,"line":1948},16,[1661,1950,1710],{"emptyLinePlaceholder":1709},[1661,1952,1954,1957,1959,1962,1964],{"class":1663,"line":1953},17,[1661,1955,1956],{"class":1671},"proxyUser",[1661,1958,1774],{"class":1675},[1661,1960,1961],{"class":1671},"name",[1661,1963,1817],{"class":1675},[1661,1965,1966],{"class":1702}," // 打印：读取了 name\n",[1661,1968,1970,1972,1974,1977,1979,1981,1984,1986,1988],{"class":1663,"line":1969},18,[1661,1971,1956],{"class":1671},[1661,1973,1774],{"class":1675},[1661,1975,1976],{"class":1671},"name ",[1661,1978,1676],{"class":1675},[1661,1980,1689],{"class":1675},[1661,1982,1983],{"class":1692},"小明",[1661,1985,1696],{"class":1675},[1661,1987,1817],{"class":1675},[1661,1989,1990],{"class":1702}," // 打印：修改了 name 为 小明\n",[1531,1992,1993,1994,1997,1998,2001],{},"用 Node.js v22 运行 ",[1540,1995,1996],{},"node demo.js","，就能看到读写都被代理层拦下来了。注意我们从头到尾没有改 ",[1540,1999,2000],{},"user"," 本身，只是在外面包了一层。",[2003,2004,2005],"tip",{},[1531,2006,2007,2009,2010,2013,2014,2017,2018,2021],{},[1540,2008,1574],{}," 拦截器记得 ",[1540,2011,2012],{},"return true","，表示赋值成功，否则严格模式下会抛错。另外代理对象和原始对象共享同一份数据，改 ",[1540,2015,2016],{},"proxyUser.name","，",[1540,2019,2020],{},"user.name"," 也会跟着变。",[1531,2023,2024,2025,2028,2029,2032,2033,2036,2037,2039],{},"这个思路和 ",[1535,2026,2027],{"href":1386},"Vue2 源码课程","里 ",[1540,2030,2031],{},"Object.defineProperty"," 的 getter/setter 一脉相承：都是拦截读写。区别在于 ",[1540,2034,2035],{},"defineProperty"," 一次只能拦截一个已存在的 key，而 ",[1540,2038,1549],{}," 拦截的是整个对象，这正是后面一切变化的基础。",[1616,2041],{},[1526,2043,2045],{"id":2044},"reactive-的实现","🧱 reactive 的实现",[1531,2047,2048,2049,2051,2052,2055,2056,2059],{},"知道了 Proxy 的用法，来看 Vue3 是怎么用它实现 ",[1540,2050,1542],{}," 的。源码主要分两块：",[1540,2053,2054],{},"reactive.ts"," 里的入口函数，和 ",[1540,2057,2058],{},"baseHandlers.ts"," 里的拦截器。我们一块一块看。",[1531,2061,2062,2065,2066,2068,2069,2072],{},[1599,2063,2064],{},"第一块：入口函数，负责「创建代理」。"," ",[1540,2067,1542],{}," 内部调用 ",[1540,2070,2071],{},"createReactiveObject","，逻辑很简单：能代理就代理，代理过的直接复用。",[1651,2074,2076],{"className":1653,"code":2075,"language":1656,"meta":1657,"style":1657},"// 简化自 packages/reactivity/src/reactive.ts\nconst reactiveMap = new WeakMap(); // 缓存：原始对象 → 代理对象\n\nfunction reactive(target) {\n    return createReactiveObject(target, reactiveMap);\n}\n\nfunction createReactiveObject(target, proxyMap) {\n    // 第一道关：不是对象，直接原样返回\n    if (typeof target !== 'object' || target === null) {\n        return target;\n    }\n\n    // 第二道关：查一下缓存，代理过就直接复用\n    const existingProxy = proxyMap.get(target);\n    if (existingProxy) {\n        return existingProxy;\n    }\n\n    // 都没命中，才真正创建代理，并登记进缓存\n    const proxy = new Proxy(target, mutableHandlers);\n    proxyMap.set(target, proxy);\n    return proxy;\n}\n",[1540,2077,2078,2083,2105,2109,2125,2146,2151,2155,2174,2179,2219,2227,2232,2236,2241,2266,2279,2287,2291,2296,2302,2329,2351,2360],{"__ignoreMap":1657},[1661,2079,2080],{"class":1663,"line":1664},[1661,2081,2082],{"class":1702},"// 简化自 packages/reactivity/src/reactive.ts\n",[1661,2084,2085,2087,2090,2092,2094,2097,2100,2102],{"class":1663,"line":1706},[1661,2086,1668],{"class":1667},[1661,2088,2089],{"class":1671}," reactiveMap ",[1661,2091,1676],{"class":1675},[1661,2093,1723],{"class":1675},[1661,2095,2096],{"class":1726}," WeakMap",[1661,2098,2099],{"class":1671},"()",[1661,2101,1817],{"class":1675},[1661,2103,2104],{"class":1702}," // 缓存：原始对象 → 代理对象\n",[1661,2106,2107],{"class":1663,"line":1713},[1661,2108,1710],{"emptyLinePlaceholder":1709},[1661,2110,2111,2114,2117,2119,2121,2123],{"class":1663,"line":1739},[1661,2112,2113],{"class":1667},"function",[1661,2115,2116],{"class":1726}," reactive",[1661,2118,1751],{"class":1675},[1661,2120,1755],{"class":1754},[1661,2122,1763],{"class":1675},[1661,2124,1736],{"class":1675},[1661,2126,2127,2130,2133,2135,2137,2139,2142,2144],{"class":1663,"line":1745},[1661,2128,2129],{"class":1801},"    return",[1661,2131,2132],{"class":1726}," createReactiveObject",[1661,2134,1751],{"class":1682},[1661,2136,1755],{"class":1671},[1661,2138,1733],{"class":1675},[1661,2140,2141],{"class":1671}," reactiveMap",[1661,2143,1763],{"class":1682},[1661,2145,1795],{"class":1675},[1661,2147,2148],{"class":1663,"line":1768},[1661,2149,2150],{"class":1675},"}\n",[1661,2152,2153],{"class":1663,"line":1798},[1661,2154,1710],{"emptyLinePlaceholder":1709},[1661,2156,2157,2159,2161,2163,2165,2167,2170,2172],{"class":1663,"line":1823},[1661,2158,2113],{"class":1667},[1661,2160,2132],{"class":1726},[1661,2162,1751],{"class":1675},[1661,2164,1755],{"class":1754},[1661,2166,1733],{"class":1675},[1661,2168,2169],{"class":1754}," proxyMap",[1661,2171,1763],{"class":1675},[1661,2173,1736],{"class":1675},[1661,2175,2176],{"class":1663,"line":1829},[1661,2177,2178],{"class":1702},"    // 第一道关：不是对象，直接原样返回\n",[1661,2180,2181,2184,2187,2190,2192,2195,2197,2200,2202,2205,2207,2210,2213,2216],{"class":1663,"line":1835},[1661,2182,2183],{"class":1801},"    if",[1661,2185,2186],{"class":1682}," (",[1661,2188,2189],{"class":1675},"typeof",[1661,2191,1805],{"class":1671},[1661,2193,2194],{"class":1675}," !==",[1661,2196,1689],{"class":1675},[1661,2198,2199],{"class":1692},"object",[1661,2201,1696],{"class":1675},[1661,2203,2204],{"class":1675}," ||",[1661,2206,1805],{"class":1671},[1661,2208,2209],{"class":1675}," ===",[1661,2211,2212],{"class":1675}," null",[1661,2214,2215],{"class":1682},") ",[1661,2217,2218],{"class":1675},"{\n",[1661,2220,2221,2223,2225],{"class":1663,"line":1858},[1661,2222,1802],{"class":1801},[1661,2224,1805],{"class":1671},[1661,2226,1795],{"class":1675},[1661,2228,2229],{"class":1663,"line":1897},[1661,2230,2231],{"class":1675},"    }\n",[1661,2233,2234],{"class":1663,"line":1919},[1661,2235,1710],{"emptyLinePlaceholder":1709},[1661,2237,2238],{"class":1663,"line":1933},[1661,2239,2240],{"class":1702},"    // 第二道关：查一下缓存，代理过就直接复用\n",[1661,2242,2243,2246,2249,2252,2254,2256,2258,2260,2262,2264],{"class":1663,"line":1938},[1661,2244,2245],{"class":1667},"    const",[1661,2247,2248],{"class":1671}," existingProxy",[1661,2250,2251],{"class":1675}," =",[1661,2253,2169],{"class":1671},[1661,2255,1774],{"class":1675},[1661,2257,1570],{"class":1726},[1661,2259,1751],{"class":1682},[1661,2261,1755],{"class":1671},[1661,2263,1763],{"class":1682},[1661,2265,1795],{"class":1675},[1661,2267,2268,2270,2272,2275,2277],{"class":1663,"line":1948},[1661,2269,2183],{"class":1801},[1661,2271,2186],{"class":1682},[1661,2273,2274],{"class":1671},"existingProxy",[1661,2276,2215],{"class":1682},[1661,2278,2218],{"class":1675},[1661,2280,2281,2283,2285],{"class":1663,"line":1953},[1661,2282,1802],{"class":1801},[1661,2284,2248],{"class":1671},[1661,2286,1795],{"class":1675},[1661,2288,2289],{"class":1663,"line":1969},[1661,2290,2231],{"class":1675},[1661,2292,2294],{"class":1663,"line":2293},19,[1661,2295,1710],{"emptyLinePlaceholder":1709},[1661,2297,2299],{"class":1663,"line":2298},20,[1661,2300,2301],{"class":1702},"    // 都没命中，才真正创建代理，并登记进缓存\n",[1661,2303,2305,2307,2310,2312,2314,2316,2318,2320,2322,2325,2327],{"class":1663,"line":2304},21,[1661,2306,2245],{"class":1667},[1661,2308,2309],{"class":1671}," proxy",[1661,2311,2251],{"class":1675},[1661,2313,1723],{"class":1675},[1661,2315,1727],{"class":1726},[1661,2317,1751],{"class":1682},[1661,2319,1755],{"class":1671},[1661,2321,1733],{"class":1675},[1661,2323,2324],{"class":1671}," mutableHandlers",[1661,2326,1763],{"class":1682},[1661,2328,1795],{"class":1675},[1661,2330,2332,2335,2337,2339,2341,2343,2345,2347,2349],{"class":1663,"line":2331},22,[1661,2333,2334],{"class":1671},"    proxyMap",[1661,2336,1774],{"class":1675},[1661,2338,1574],{"class":1726},[1661,2340,1751],{"class":1682},[1661,2342,1755],{"class":1671},[1661,2344,1733],{"class":1675},[1661,2346,2309],{"class":1671},[1661,2348,1763],{"class":1682},[1661,2350,1795],{"class":1675},[1661,2352,2354,2356,2358],{"class":1663,"line":2353},23,[1661,2355,2129],{"class":1801},[1661,2357,2309],{"class":1671},[1661,2359,1795],{"class":1675},[1661,2361,2363],{"class":1663,"line":2362},24,[1661,2364,2150],{"class":1675},[1531,2366,2367,2368,2371,2372,2375],{},"这里的 ",[1540,2369,2370],{},"reactiveMap"," 是一个 ",[1599,2373,2374],{},"WeakMap","，作用是做缓存：每创建一个代理，就记下「这个原始对象，对应的代理是谁」。下次再传入同一个对象，直接从缓存里拿，不用重复创建。至于 WeakMap 和普通 Map 的区别（key 只能是对象、不阻止垃圾回收），「了解即可」，把它当成能按对象存东西的 Map 就行。",[1531,2377,2378,2385,2386,2388,2389,1606,2391,2393],{},[1599,2379,2380,2381,2384],{},"第二块：拦截器 ",[1540,2382,2383],{},"mutableHandlers","，响应式的核心。"," 上面创建代理时传入的 ",[1540,2387,2383],{},"，就是实际执行拦截逻辑的地方。它在 ",[1540,2390,1570],{},[1540,2392,1574],{}," 里各做了三件事：",[1651,2395,2397],{"className":1653,"code":2396,"language":1656,"meta":1657,"style":1657},"// 简化自 packages/reactivity/src/baseHandlers.ts\nconst mutableHandlers = {\n    get(target, key, receiver) {\n        // 1. 正常取回结果（Reflect 的作用和 target[key] 一样）\n        const res = Reflect.get(target, key, receiver);\n\n        // 2. 收集依赖：登记「谁在用这个属性」\n        // 细节下一篇讲，这里先占位：track(target, key)\n\n        // 3. 取到的值还是对象？顺手把它也变成响应式\n        if (typeof res === 'object' && res !== null) {\n            return reactive(res);\n        }\n        return res;\n    },\n    set(target, key, value, receiver) {\n        // 1. 正常更新数据\n        const result = Reflect.set(target, key, value, receiver);\n\n        // 2. 触发更新：通知用到这个属性的地方，下一篇细讲\n        // trigger(target, key)\n\n        return result;\n    },\n};\n",[1540,2398,2399,2404,2415,2436,2441,2474,2478,2483,2488,2492,2497,2529,2545,2550,2558,2562,2586,2591,2626,2630,2635,2640,2644,2652,2656],{"__ignoreMap":1657},[1661,2400,2401],{"class":1663,"line":1664},[1661,2402,2403],{"class":1702},"// 简化自 packages/reactivity/src/baseHandlers.ts\n",[1661,2405,2406,2408,2411,2413],{"class":1663,"line":1706},[1661,2407,1668],{"class":1667},[1661,2409,2410],{"class":1671}," mutableHandlers ",[1661,2412,1676],{"class":1675},[1661,2414,1736],{"class":1675},[1661,2416,2417,2419,2421,2423,2425,2427,2429,2432,2434],{"class":1663,"line":1713},[1661,2418,1748],{"class":1682},[1661,2420,1751],{"class":1675},[1661,2422,1755],{"class":1754},[1661,2424,1733],{"class":1675},[1661,2426,1760],{"class":1754},[1661,2428,1733],{"class":1675},[1661,2430,2431],{"class":1754}," receiver",[1661,2433,1763],{"class":1675},[1661,2435,1736],{"class":1675},[1661,2437,2438],{"class":1663,"line":1739},[1661,2439,2440],{"class":1702},"        // 1. 正常取回结果（Reflect 的作用和 target[key] 一样）\n",[1661,2442,2443,2446,2449,2451,2454,2456,2458,2460,2462,2464,2466,2468,2470,2472],{"class":1663,"line":1745},[1661,2444,2445],{"class":1667},"        const",[1661,2447,2448],{"class":1671}," res",[1661,2450,2251],{"class":1675},[1661,2452,2453],{"class":1671}," Reflect",[1661,2455,1774],{"class":1675},[1661,2457,1570],{"class":1726},[1661,2459,1751],{"class":1682},[1661,2461,1755],{"class":1671},[1661,2463,1733],{"class":1675},[1661,2465,1760],{"class":1671},[1661,2467,1733],{"class":1675},[1661,2469,2431],{"class":1671},[1661,2471,1763],{"class":1682},[1661,2473,1795],{"class":1675},[1661,2475,2476],{"class":1663,"line":1768},[1661,2477,1710],{"emptyLinePlaceholder":1709},[1661,2479,2480],{"class":1663,"line":1798},[1661,2481,2482],{"class":1702},"        // 2. 收集依赖：登记「谁在用这个属性」\n",[1661,2484,2485],{"class":1663,"line":1823},[1661,2486,2487],{"class":1702},"        // 细节下一篇讲，这里先占位：track(target, key)\n",[1661,2489,2490],{"class":1663,"line":1829},[1661,2491,1710],{"emptyLinePlaceholder":1709},[1661,2493,2494],{"class":1663,"line":1835},[1661,2495,2496],{"class":1702},"        // 3. 取到的值还是对象？顺手把它也变成响应式\n",[1661,2498,2499,2502,2504,2506,2508,2510,2512,2514,2516,2519,2521,2523,2525,2527],{"class":1663,"line":1858},[1661,2500,2501],{"class":1801},"        if",[1661,2503,2186],{"class":1682},[1661,2505,2189],{"class":1675},[1661,2507,2448],{"class":1671},[1661,2509,2209],{"class":1675},[1661,2511,1689],{"class":1675},[1661,2513,2199],{"class":1692},[1661,2515,1696],{"class":1675},[1661,2517,2518],{"class":1675}," &&",[1661,2520,2448],{"class":1671},[1661,2522,2194],{"class":1675},[1661,2524,2212],{"class":1675},[1661,2526,2215],{"class":1682},[1661,2528,2218],{"class":1675},[1661,2530,2531,2534,2536,2538,2541,2543],{"class":1663,"line":1897},[1661,2532,2533],{"class":1801},"            return",[1661,2535,2116],{"class":1726},[1661,2537,1751],{"class":1682},[1661,2539,2540],{"class":1671},"res",[1661,2542,1763],{"class":1682},[1661,2544,1795],{"class":1675},[1661,2546,2547],{"class":1663,"line":1919},[1661,2548,2549],{"class":1675},"        }\n",[1661,2551,2552,2554,2556],{"class":1663,"line":1933},[1661,2553,1802],{"class":1801},[1661,2555,2448],{"class":1671},[1661,2557,1795],{"class":1675},[1661,2559,2560],{"class":1663,"line":1938},[1661,2561,1826],{"class":1675},[1661,2563,2564,2566,2568,2570,2572,2574,2576,2578,2580,2582,2584],{"class":1663,"line":1948},[1661,2565,1838],{"class":1682},[1661,2567,1751],{"class":1675},[1661,2569,1755],{"class":1754},[1661,2571,1733],{"class":1675},[1661,2573,1760],{"class":1754},[1661,2575,1733],{"class":1675},[1661,2577,1851],{"class":1754},[1661,2579,1733],{"class":1675},[1661,2581,2431],{"class":1754},[1661,2583,1763],{"class":1675},[1661,2585,1736],{"class":1675},[1661,2587,2588],{"class":1663,"line":1953},[1661,2589,2590],{"class":1702},"        // 1. 正常更新数据\n",[1661,2592,2593,2595,2598,2600,2602,2604,2606,2608,2610,2612,2614,2616,2618,2620,2622,2624],{"class":1663,"line":1969},[1661,2594,2445],{"class":1667},[1661,2596,2597],{"class":1671}," result",[1661,2599,2251],{"class":1675},[1661,2601,2453],{"class":1671},[1661,2603,1774],{"class":1675},[1661,2605,1574],{"class":1726},[1661,2607,1751],{"class":1682},[1661,2609,1755],{"class":1671},[1661,2611,1733],{"class":1675},[1661,2613,1760],{"class":1671},[1661,2615,1733],{"class":1675},[1661,2617,1851],{"class":1671},[1661,2619,1733],{"class":1675},[1661,2621,2431],{"class":1671},[1661,2623,1763],{"class":1682},[1661,2625,1795],{"class":1675},[1661,2627,2628],{"class":1663,"line":2293},[1661,2629,1710],{"emptyLinePlaceholder":1709},[1661,2631,2632],{"class":1663,"line":2298},[1661,2633,2634],{"class":1702},"        // 2. 触发更新：通知用到这个属性的地方，下一篇细讲\n",[1661,2636,2637],{"class":1663,"line":2304},[1661,2638,2639],{"class":1702},"        // trigger(target, key)\n",[1661,2641,2642],{"class":1663,"line":2331},[1661,2643,1710],{"emptyLinePlaceholder":1709},[1661,2645,2646,2648,2650],{"class":1663,"line":2353},[1661,2647,1802],{"class":1801},[1661,2649,2597],{"class":1671},[1661,2651,1795],{"class":1675},[1661,2653,2654],{"class":1663,"line":2362},[1661,2655,1826],{"class":1675},[1661,2657,2659],{"class":1663,"line":2658},25,[1661,2660,2661],{"class":1675},"};\n",[1531,2663,2664],{},"代码里还有三个新概念，逐个解释一下：",[1559,2666,2667,2681,2694],{},[1562,2668,2669,2672,2673,2676,2677,2680],{},[1599,2670,2671],{},"Reflect","：一组和对象操作配套的工具方法。",[1540,2674,2675],{},"Reflect.get(target, key)"," 效果等同 ",[1540,2678,2679],{},"target[key]","，Vue 源码统一用它，是为了在一些继承场景下行为更正确。细节「了解即可」，你把它读成「正常取值 / 正常赋值」就行。",[1562,2682,2683,2689,2690,2693],{},[1599,2684,2685,2688],{},[1540,2686,2687],{},"track()","（收集依赖）","：读取时登记「谁在用这个数据」。「依赖」指的就是用到这个数据的地方，比如一个渲染函数。目前它只是占位注释，下一篇讲 ",[1540,2691,2692],{},"effect"," 时展开。",[1562,2695,2696,2702],{},[1599,2697,2698,2701],{},[1540,2699,2700],{},"trigger()","（触发更新）","：修改时反过来通知这些使用者：数据变了，该更新了。同样下一篇细讲。",[1531,2704,2705,2706],{},"整个流程可以概括成一句话：",[1599,2707,2708],{},"读的时候收集依赖，写的时候触发更新，中间靠 Proxy 拦截。",[1616,2710],{},[1526,2712,2714],{"id":2713},"懒代理与缓存两个设计细节","🧱 懒代理与缓存：两个设计细节",[1531,2716,2717],{},"上面的简化代码里藏着两个容易忽略的设计：嵌套对象什么时候被代理？同一个对象会不会被重复代理？这一节回答这两个问题，它们都是为性能服务的。",[1531,2719,2720],{},[1599,2721,2722],{},"其一，懒代理：嵌套对象在 get 时才递归 reactive。",[1531,2724,2725,2726,2728,2729,2732,2733,1649],{},"回忆 ",[1540,2727,1570],{}," 拦截器的第 3 步：取到的值如果是对象，当场才调 ",[1540,2730,2731],{},"reactive(res)"," 包装。也就是说，Vue3 不会在初始化时一口气把整棵对象树都代理掉，而是",[1599,2734,2735],{},"访问到哪层，才代理哪层",[1651,2737,2739],{"className":1653,"code":2738,"language":1656,"meta":1657,"style":1657},"const state = reactive({\n    user: { info: { city: '杭州' } },\n});\n\n// 只读 state.user 时，info 这层还是普通对象\n// 直到读 state.user.info，info 才被包装成代理\n",[1540,2740,2741,2756,2790,2798,2802,2807],{"__ignoreMap":1657},[1661,2742,2743,2745,2748,2750,2752,2754],{"class":1663,"line":1664},[1661,2744,1668],{"class":1667},[1661,2746,2747],{"class":1671}," state ",[1661,2749,1676],{"class":1675},[1661,2751,2116],{"class":1726},[1661,2753,1751],{"class":1671},[1661,2755,2218],{"class":1675},[1661,2757,2758,2761,2763,2765,2768,2770,2772,2775,2777,2779,2782,2784,2787],{"class":1663,"line":1706},[1661,2759,2760],{"class":1682},"    user",[1661,2762,1686],{"class":1675},[1661,2764,1679],{"class":1675},[1661,2766,2767],{"class":1682}," info",[1661,2769,1686],{"class":1675},[1661,2771,1679],{"class":1675},[1661,2773,2774],{"class":1682}," city",[1661,2776,1686],{"class":1675},[1661,2778,1689],{"class":1675},[1661,2780,2781],{"class":1692},"杭州",[1661,2783,1696],{"class":1675},[1661,2785,2786],{"class":1675}," }",[1661,2788,2789],{"class":1675}," },\n",[1661,2791,2792,2794,2796],{"class":1663,"line":1713},[1661,2793,1941],{"class":1675},[1661,2795,1763],{"class":1671},[1661,2797,1795],{"class":1675},[1661,2799,2800],{"class":1663,"line":1739},[1661,2801,1710],{"emptyLinePlaceholder":1709},[1661,2803,2804],{"class":1663,"line":1745},[1661,2805,2806],{"class":1702},"// 只读 state.user 时，info 这层还是普通对象\n",[1661,2808,2809],{"class":1663,"line":1768},[1661,2810,2811],{"class":1702},"// 直到读 state.user.info，info 才被包装成代理\n",[1531,2813,2814],{},"生活化一点说，这就像装修房子：不是买房当天把每个房间都装好，而是你要进哪个房间，才装哪个。对于嵌套很深但只用到一部分的大对象，这个策略能省下不少初始化开销。",[2003,2816,2817],{},[1531,2818,2819,2820,2822],{},"懒代理和缓存是配合工作的：",[1540,2821,2731],{}," 内部会查 WeakMap 缓存，所以同一层对象不管被读多少次，只会被包装一次。",[1531,2824,2825],{},[1599,2826,2827],{},"其二，缓存：已代理过的对象直接复用。",[1531,2829,2830,2832],{},[1540,2831,2071],{}," 里的 WeakMap 缓存保证了「同一个原始对象，全局只有一个代理」。这带来一个实际效果：",[1651,2834,2836],{"className":1653,"code":2835,"language":1656,"meta":1657,"style":1657},"const raw = { name: 'noxussj' };\n\nreactive(raw) === reactive(raw); // true，两次拿到的是同一个代理\n",[1540,2837,2838,2862,2866],{"__ignoreMap":1657},[1661,2839,2840,2842,2845,2847,2849,2851,2853,2855,2857,2859],{"class":1663,"line":1664},[1661,2841,1668],{"class":1667},[1661,2843,2844],{"class":1671}," raw ",[1661,2846,1676],{"class":1675},[1661,2848,1679],{"class":1675},[1661,2850,1683],{"class":1682},[1661,2852,1686],{"class":1675},[1661,2854,1689],{"class":1675},[1661,2856,1693],{"class":1692},[1661,2858,1696],{"class":1675},[1661,2860,2861],{"class":1675}," };\n",[1661,2863,2864],{"class":1663,"line":1706},[1661,2865,1710],{"emptyLinePlaceholder":1709},[1661,2867,2868,2870,2873,2876,2878,2881,2883],{"class":1663,"line":1713},[1661,2869,1542],{"class":1726},[1661,2871,2872],{"class":1671},"(raw) ",[1661,2874,2875],{"class":1675},"===",[1661,2877,2116],{"class":1726},[1661,2879,2880],{"class":1671},"(raw)",[1661,2882,1817],{"class":1675},[1661,2884,2885],{"class":1702}," // true，两次拿到的是同一个代理\n",[1616,2887],{},[1526,2889,2891],{"id":2890},"对比-vue2解决了哪些局限","⚡ 对比 Vue2：解决了哪些局限",[1531,2893,2894,2895,2897,2898,2901,2902,2905,2906,2909,2910,2913],{},"学完了实现，我们回头看一个更实际的问题：这套 Proxy 方案，到底比 Vue2 好在哪里？回顾一下 Vue2 响应式的两个经典局限（详见 ",[1535,2896,2027],{"href":1386},"）：",[1599,2899,2900],{},"对象新增属性不触发更新","、",[1599,2903,2904],{},"数组下标赋值或改 length 不触发更新","，当时得靠 ",[1540,2907,2908],{},"this.$set"," 或 ",[1540,2911,2912],{},"splice"," 绕开。",[1531,2915,2916,2917,2919,2920,2923,2924,1571,2926,2928],{},"根源在于 ",[1540,2918,2035],{}," 只能拦截初始化时已存在的 key，新加的 key 身上没有拦截逻辑，Vue 自然感知不到。而 Proxy 拦截的是",[1599,2921,2922],{},"整个对象","，任何 key 的读写都会经过 ",[1540,2925,1570],{},[1540,2927,1574],{},"，这些坑在 Vue3 下直接消失了：",[1651,2930,2935],{"className":2931,"code":2932,"filename":2933,"language":2934,"meta":1657,"style":1657},"language-vue shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\u003Cscript setup>\nimport { reactive } from 'vue';\n\nconst user = reactive({ name: 'noxussj' });\nconst list = reactive(['a', 'b', 'c']);\n\nfunction test() {\n    user.age = 18; // Vue2 里不触发更新，Vue3 正常\n    list[0] = 'z'; // Vue2 里不触发更新，Vue3 正常\n    list.length = 1; // Vue2 里不触发更新，Vue3 正常\n}\n\u003C/script>\n","App.vue","vue",[1540,2936,2937,2951,2973,2977,3008,3051,3055,3066,3086,3111,3129,3133],{"__ignoreMap":1657},[1661,2938,2939,2942,2945,2948],{"class":1663,"line":1664},[1661,2940,2941],{"class":1675},"\u003C",[1661,2943,2944],{"class":1682},"script",[1661,2946,2947],{"class":1667}," setup",[1661,2949,2950],{"class":1675},">\n",[1661,2952,2953,2956,2958,2960,2962,2965,2967,2969,2971],{"class":1663,"line":1706},[1661,2954,2955],{"class":1801},"import",[1661,2957,1679],{"class":1675},[1661,2959,2116],{"class":1671},[1661,2961,2786],{"class":1675},[1661,2963,2964],{"class":1801}," from",[1661,2966,1689],{"class":1675},[1661,2968,2934],{"class":1692},[1661,2970,1696],{"class":1675},[1661,2972,1795],{"class":1675},[1661,2974,2975],{"class":1663,"line":1713},[1661,2976,1710],{"emptyLinePlaceholder":1709},[1661,2978,2979,2981,2983,2985,2987,2989,2992,2994,2996,2998,3000,3002,3004,3006],{"class":1663,"line":1739},[1661,2980,1668],{"class":1667},[1661,2982,1672],{"class":1671},[1661,2984,1676],{"class":1675},[1661,2986,2116],{"class":1726},[1661,2988,1751],{"class":1671},[1661,2990,2991],{"class":1675},"{",[1661,2993,1683],{"class":1682},[1661,2995,1686],{"class":1675},[1661,2997,1689],{"class":1675},[1661,2999,1693],{"class":1692},[1661,3001,1696],{"class":1675},[1661,3003,2786],{"class":1675},[1661,3005,1763],{"class":1671},[1661,3007,1795],{"class":1675},[1661,3009,3010,3012,3015,3017,3019,3022,3024,3026,3028,3030,3032,3035,3037,3039,3041,3044,3046,3049],{"class":1663,"line":1745},[1661,3011,1668],{"class":1667},[1661,3013,3014],{"class":1671}," list ",[1661,3016,1676],{"class":1675},[1661,3018,2116],{"class":1726},[1661,3020,3021],{"class":1671},"([",[1661,3023,1696],{"class":1675},[1661,3025,1535],{"class":1692},[1661,3027,1696],{"class":1675},[1661,3029,1733],{"class":1675},[1661,3031,1689],{"class":1675},[1661,3033,3034],{"class":1692},"b",[1661,3036,1696],{"class":1675},[1661,3038,1733],{"class":1675},[1661,3040,1689],{"class":1675},[1661,3042,3043],{"class":1692},"c",[1661,3045,1696],{"class":1675},[1661,3047,3048],{"class":1671},"])",[1661,3050,1795],{"class":1675},[1661,3052,3053],{"class":1663,"line":1768},[1661,3054,1710],{"emptyLinePlaceholder":1709},[1661,3056,3057,3059,3062,3064],{"class":1663,"line":1798},[1661,3058,2113],{"class":1667},[1661,3060,3061],{"class":1726}," test",[1661,3063,2099],{"class":1675},[1661,3065,1736],{"class":1675},[1661,3067,3068,3070,3072,3075,3077,3081,3083],{"class":1663,"line":1823},[1661,3069,2760],{"class":1671},[1661,3071,1774],{"class":1675},[1661,3073,3074],{"class":1671},"age",[1661,3076,2251],{"class":1675},[1661,3078,3080],{"class":3079},"smPcV"," 18",[1661,3082,1817],{"class":1675},[1661,3084,3085],{"class":1702}," // Vue2 里不触发更新，Vue3 正常\n",[1661,3087,3088,3091,3093,3096,3098,3100,3102,3105,3107,3109],{"class":1663,"line":1829},[1661,3089,3090],{"class":1671},"    list",[1661,3092,1808],{"class":1682},[1661,3094,3095],{"class":3079},"0",[1661,3097,1907],{"class":1682},[1661,3099,1676],{"class":1675},[1661,3101,1689],{"class":1675},[1661,3103,3104],{"class":1692},"z",[1661,3106,1696],{"class":1675},[1661,3108,1817],{"class":1675},[1661,3110,3085],{"class":1702},[1661,3112,3113,3115,3117,3120,3122,3125,3127],{"class":1663,"line":1835},[1661,3114,3090],{"class":1671},[1661,3116,1774],{"class":1675},[1661,3118,3119],{"class":1671},"length",[1661,3121,2251],{"class":1675},[1661,3123,3124],{"class":3079}," 1",[1661,3126,1817],{"class":1675},[1661,3128,3085],{"class":1702},[1661,3130,3131],{"class":1663,"line":1858},[1661,3132,2150],{"class":1675},[1661,3134,3135,3138,3140],{"class":1663,"line":1897},[1661,3136,3137],{"class":1675},"\u003C/",[1661,3139,2944],{"class":1682},[1661,3141,2950],{"class":1675},[1531,3143,3144,3145,3147,3148,3150,3151,1606,3154,3157,3158,3161],{},"新增 ",[1540,3146,3074],{}," 时，Proxy 的 ",[1540,3149,1574],{}," 照常触发；",[1540,3152,3153],{},"list[0]",[1540,3155,3156],{},"list.length"," 对 Proxy 来说也只是普通的属性读写，一样被拦截。Vue2 里需要特殊记忆的 ",[1540,3159,3160],{},"$set"," 用法，在 Vue3 里成为了历史。",[1531,3163,3164,3165,3168,3169,3171],{},"另外 Vue2 为数组重写七个方法的那套复杂逻辑，Vue3 也不再需要了：Proxy 连 ",[1540,3166,3167],{},"push"," 触发的下标写入和 ",[1540,3170,3119],{}," 变化都能感知，统一走同一套拦截机制，心智负担小了很多。",[1616,3173],{},[1526,3175,3177],{"id":3176},"注意事项reactive-的局限","🪤 注意事项：reactive 的局限",[1531,3179,3180,3181,3183],{},"Proxy 方案虽然强大，但 ",[1540,3182,1542],{}," 也不是万能的。这一节说说它的两条边界，帮你避开日常开发里容易踩的坑。",[1531,3185,3186],{},[1599,3187,3188],{},"其一，只能代理对象。",[1531,3190,3191,3193,3194,1649],{},[1540,3192,2071],{}," 开头就做了判断：不是对象直接原样返回。所以基本类型值（字符串、数字等）没法用 ",[1540,3195,1542],{},[1651,3197,3199],{"className":1653,"code":3198,"language":1656,"meta":1657,"style":1657},"const count = reactive(0); // 无效，0 不是对象，原样返回\n",[1540,3200,3201],{"__ignoreMap":1657},[1661,3202,3203,3205,3208,3210,3212,3214,3216,3218,3220],{"class":1663,"line":1664},[1661,3204,1668],{"class":1667},[1661,3206,3207],{"class":1671}," count ",[1661,3209,1676],{"class":1675},[1661,3211,2116],{"class":1726},[1661,3213,1751],{"class":1671},[1661,3215,3095],{"class":3079},[1661,3217,1763],{"class":1671},[1661,3219,1817],{"class":1675},[1661,3221,3222],{"class":1702}," // 无效，0 不是对象，原样返回\n",[1531,3224,3225],{},[1599,3226,3227],{},"其二，解构会丢失响应式。",[1531,3229,3230,3232],{},[1540,3231,1542],{}," 的响应式能力来自 Proxy 的拦截，而解构是把属性值「取出来」赋给新变量。取出来的那一刻，新变量就和代理对象没有关系了：",[1651,3234,3236],{"className":1653,"code":3235,"language":1656,"meta":1657,"style":1657},"const state = reactive({ count: 0 });\n\nconst { count } = state; // count 只是一个普通数字 0\ncount++; // 改的是这个新变量，视图不会更新\n",[1540,3237,3238,3266,3270,3290],{"__ignoreMap":1657},[1661,3239,3240,3242,3244,3246,3248,3250,3252,3255,3257,3260,3262,3264],{"class":1663,"line":1664},[1661,3241,1668],{"class":1667},[1661,3243,2747],{"class":1671},[1661,3245,1676],{"class":1675},[1661,3247,2116],{"class":1726},[1661,3249,1751],{"class":1671},[1661,3251,2991],{"class":1675},[1661,3253,3254],{"class":1682}," count",[1661,3256,1686],{"class":1675},[1661,3258,3259],{"class":3079}," 0",[1661,3261,2786],{"class":1675},[1661,3263,1763],{"class":1671},[1661,3265,1795],{"class":1675},[1661,3267,3268],{"class":1663,"line":1706},[1661,3269,1710],{"emptyLinePlaceholder":1709},[1661,3271,3272,3274,3276,3278,3280,3282,3285,3287],{"class":1663,"line":1713},[1661,3273,1668],{"class":1667},[1661,3275,1679],{"class":1675},[1661,3277,3207],{"class":1671},[1661,3279,1941],{"class":1675},[1661,3281,2251],{"class":1675},[1661,3283,3284],{"class":1671}," state",[1661,3286,1817],{"class":1675},[1661,3288,3289],{"class":1702}," // count 只是一个普通数字 0\n",[1661,3291,3292,3295,3298],{"class":1663,"line":1739},[1661,3293,3294],{"class":1671},"count",[1661,3296,3297],{"class":1675},"++;",[1661,3299,3300],{"class":1702}," // 改的是这个新变量，视图不会更新\n",[1531,3302,3303,3304,3306,3307,3310],{},"这两条限制正是 ",[1540,3305,1593],{}," 存在的动机：基本类型想响应式怎么办？解构后想保持响应式怎么办？答案是包一层带 ",[1540,3308,3309],{},".value"," 的对象，具体实现我们在「ref 与 computed 原理」一篇会展开。",[3312,3313,3314],"warning",{},[1531,3315,3316,3317,3320,3321,1594],{},"日常开发中，解构丢失响应式是新手常见的坑。如果确实需要解构，可以使用 ",[1540,3318,3319],{},"toRefs","，用法细节见 ",[1535,3322,1537],{"href":671},[1616,3324],{},[1526,3326,3328],{"id":3327},"小节总结","🧾 小节总结",[1559,3330,3331,3340,3348,3363,3366,3372],{},[1562,3332,3333,3334,3336,3337,3339],{},"Vue3 用 ",[1540,3335,1549],{}," 替代 ",[1540,3338,2031],{},"，拦截的是整个对象而不是单个 key。",[1562,3341,3342,3344,3345,3347],{},[1540,3343,1542],{}," 内部是 ",[1540,3346,2071],{},"：用 WeakMap 缓存代理，保证同一个原始对象只有一个代理。",[1562,3349,3350,3351,3353,3354,3356,3357,3359,3360,3362],{},"拦截器 ",[1540,3352,2383],{}," 的核心：get 里取回结果、递归 ",[1540,3355,1542],{}," 嵌套对象、",[1540,3358,2687],{}," 收集依赖；set 里更新数据、",[1540,3361,2700],{}," 触发更新。",[1562,3364,3365],{},"嵌套对象是懒代理：访问到哪层才代理哪层，节省初始化开销。",[1562,3367,3368,3369,3371],{},"Proxy 让 Vue2 的两个经典局限（新增属性、数组下标赋值、改 length）自然消失，",[1540,3370,3160],{}," 成为历史。",[1562,3373,3374,3376,3377,3379],{},[1540,3375,1542],{}," 的局限：只能代理对象、解构会丢失响应式，这正是 ",[1540,3378,1593],{}," 存在的动机。",[1616,3381],{},[1526,3383,3385],{"id":3384},"知识问答","❓ 知识问答",[1531,3387,3388],{},[1599,3389,3390],{},"Q1：Proxy 为什么能拦截「新增属性」，defineProperty 就不行？",[1531,3392,3393,3394,3397,3398,2017,3401,3403],{},"A：defineProperty 是在初始化时给",[1599,3395,3396],{},"已有的每个 key"," 单独安装 getter/setter，后来新增的 key 身上没有任何拦截逻辑，自然感知不到。Proxy 则不同，它拦截的是对整个对象的",[1599,3399,3400],{},"操作行为",[1540,3402,1574],{}," 拦截器不关心 key 是新增的还是已有的，赋值动作都会经过它。",[1531,3405,3406],{},[1599,3407,3408],{},"Q2：为什么嵌套对象不一次性全部代理，而是访问时才代理？",[1531,3410,3411],{},"A：主要是性能考虑。大对象可能嵌套很深，但实际只用到其中一部分，一次性全代理会做大量无用功。懒代理把开销摊到实际访问时，配合 WeakMap 缓存，同一层也只包装一次，整体更划算。",[1531,3413,3414],{},[1599,3415,3416,3417,3419],{},"Q3：为什么用 Reflect.get / Reflect.set，而不直接写 target",[1661,3418,1811],{},"？",[1531,3421,3422,3423,3426,3427,3430],{},"A：两者在简单场景下效果相同，但 Reflect 的方法可以传入 ",[1540,3424,3425],{},"receiver"," 参数，保证访问器属性（getter）里的 ",[1540,3428,3429],{},"this"," 指向代理对象而不是原始对象，在原型继承等场景下行为更正确。这个细节「了解即可」，读源码时把 Reflect 当成正常取值赋值来理解，不影响主线。",[1531,3432,3433],{},[1599,3434,3435],{},"Q4：Proxy 的浏览器兼容性怎么样？",[1531,3437,3438],{},"A：Proxy 无法通过 polyfill 完整模拟，所以 Vue3 不支持 IE 等老浏览器，这也是 Vue3 放弃 IE 的原因之一。现代浏览器（Chrome、Firefox、Safari、Edge）都已支持，日常使用没有问题。",[1531,3440,3441],{},[1599,3442,3443],{},"Q5：多次对同一个对象调 reactive，会创建多个代理吗？",[1531,3445,3446,3447,3449,3450,3453,3454,1594],{},"A：不会。",[1540,3448,2071],{}," 会先查 WeakMap 缓存，同一个原始对象只会创建一个代理，之后都是直接复用，",[1540,3451,3452],{},"reactive(raw) === reactive(raw)"," 结果为 ",[1540,3455,3456],{},"true",[1616,3458],{},[1526,3460,3462],{"id":3461},"小练习","🧪 小练习",[1531,3464,3465,3466,3468,3469,3472],{},"不查资料，补全下面的迷你 ",[1540,3467,1542],{},"：用 Proxy 实现读取时打印「读取了 xxx」，修改时打印「修改了 xxx 为 新值」。要求带上 WeakMap 缓存，同一个对象重复代理时复用。用 Node.js v22 保存为 ",[1540,3470,3471],{},".js"," 文件直接运行验证。",[1651,3474,3476],{"className":1653,"code":3475,"language":1656,"meta":1657,"style":1657},"const proxyMap = new WeakMap();\n\nfunction reactive(target) {\n    // 请在这里编写代码（提示：不是对象直接返回；查缓存；创建 Proxy）\n}\n\nconst user = { name: 'noxussj' };\nconst proxyUser = reactive(user);\n\n// 期望输出：\n// 读取了 name\n// 修改了 name 为 小明\nconsole.log(proxyUser.name);\nproxyUser.name = '小明';\n\n// 验证缓存：两次代理应该是同一个对象\nconsole.log(reactive(user) === proxyUser); // true\n",[1540,3477,3478,3495,3499,3513,3518,3522,3526,3548,3563,3567,3572,3577,3582,3601,3619,3623,3628],{"__ignoreMap":1657},[1661,3479,3480,3482,3485,3487,3489,3491,3493],{"class":1663,"line":1664},[1661,3481,1668],{"class":1667},[1661,3483,3484],{"class":1671}," proxyMap ",[1661,3486,1676],{"class":1675},[1661,3488,1723],{"class":1675},[1661,3490,2096],{"class":1726},[1661,3492,2099],{"class":1671},[1661,3494,1795],{"class":1675},[1661,3496,3497],{"class":1663,"line":1706},[1661,3498,1710],{"emptyLinePlaceholder":1709},[1661,3500,3501,3503,3505,3507,3509,3511],{"class":1663,"line":1713},[1661,3502,2113],{"class":1667},[1661,3504,2116],{"class":1726},[1661,3506,1751],{"class":1675},[1661,3508,1755],{"class":1754},[1661,3510,1763],{"class":1675},[1661,3512,1736],{"class":1675},[1661,3514,3515],{"class":1663,"line":1739},[1661,3516,3517],{"class":1702},"    // 请在这里编写代码（提示：不是对象直接返回；查缓存；创建 Proxy）\n",[1661,3519,3520],{"class":1663,"line":1745},[1661,3521,2150],{"class":1675},[1661,3523,3524],{"class":1663,"line":1768},[1661,3525,1710],{"emptyLinePlaceholder":1709},[1661,3527,3528,3530,3532,3534,3536,3538,3540,3542,3544,3546],{"class":1663,"line":1798},[1661,3529,1668],{"class":1667},[1661,3531,1672],{"class":1671},[1661,3533,1676],{"class":1675},[1661,3535,1679],{"class":1675},[1661,3537,1683],{"class":1682},[1661,3539,1686],{"class":1675},[1661,3541,1689],{"class":1675},[1661,3543,1693],{"class":1692},[1661,3545,1696],{"class":1675},[1661,3547,2861],{"class":1675},[1661,3549,3550,3552,3554,3556,3558,3561],{"class":1663,"line":1823},[1661,3551,1668],{"class":1667},[1661,3553,1718],{"class":1671},[1661,3555,1676],{"class":1675},[1661,3557,2116],{"class":1726},[1661,3559,3560],{"class":1671},"(user)",[1661,3562,1795],{"class":1675},[1661,3564,3565],{"class":1663,"line":1829},[1661,3566,1710],{"emptyLinePlaceholder":1709},[1661,3568,3569],{"class":1663,"line":1835},[1661,3570,3571],{"class":1702},"// 期望输出：\n",[1661,3573,3574],{"class":1663,"line":1858},[1661,3575,3576],{"class":1702},"// 读取了 name\n",[1661,3578,3579],{"class":1663,"line":1897},[1661,3580,3581],{"class":1702},"// 修改了 name 为 小明\n",[1661,3583,3584,3587,3589,3591,3594,3596,3599],{"class":1663,"line":1919},[1661,3585,3586],{"class":1671},"console",[1661,3588,1774],{"class":1675},[1661,3590,1777],{"class":1726},[1661,3592,3593],{"class":1671},"(proxyUser",[1661,3595,1774],{"class":1675},[1661,3597,3598],{"class":1671},"name)",[1661,3600,1795],{"class":1675},[1661,3602,3603,3605,3607,3609,3611,3613,3615,3617],{"class":1663,"line":1933},[1661,3604,1956],{"class":1671},[1661,3606,1774],{"class":1675},[1661,3608,1976],{"class":1671},[1661,3610,1676],{"class":1675},[1661,3612,1689],{"class":1675},[1661,3614,1983],{"class":1692},[1661,3616,1696],{"class":1675},[1661,3618,1795],{"class":1675},[1661,3620,3621],{"class":1663,"line":1938},[1661,3622,1710],{"emptyLinePlaceholder":1709},[1661,3624,3625],{"class":1663,"line":1948},[1661,3626,3627],{"class":1702},"// 验证缓存：两次代理应该是同一个对象\n",[1661,3629,3630,3632,3634,3636,3638,3640,3643,3645,3648,3650],{"class":1663,"line":1953},[1661,3631,3586],{"class":1671},[1661,3633,1774],{"class":1675},[1661,3635,1777],{"class":1726},[1661,3637,1751],{"class":1671},[1661,3639,1542],{"class":1726},[1661,3641,3642],{"class":1671},"(user) ",[1661,3644,2875],{"class":1675},[1661,3646,3647],{"class":1671}," proxyUser)",[1661,3649,1817],{"class":1675},[1661,3651,3652],{"class":1702}," // true\n",[1531,3654,3655,3656,3658,3659,3662,3663,3666],{},"完成后给自己加个挑战：如果 ",[1540,3657,2000],{}," 里再嵌套一层对象（如 ",[1540,3660,3661],{},"info: { city: '杭州' }","），修改 ",[1540,3664,3665],{},"proxyUser.info.city"," 时你的实现能打印日志吗？需要参考「懒代理」的思路改动哪里？",[1616,3668],{},[1531,3670,3671,3672,3674,3675,3677,3678,3680],{},"🎉 恭喜你已经掌握 Vue3 的 Proxy 响应式原理啦！下一篇我们接着讲 ",[1540,3673,2692],{}," 与依赖收集触发，看看 ",[1540,3676,2687],{}," 到底把「谁在用这个数据」登记到了哪里，",[1540,3679,2700],{}," 又是如何精确通知更新的。",[3682,3683,3684],"style",{},"html pre.shiki code .s50WR, html code.shiki .s50WR{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sndM8, html code.shiki .sndM8{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .s86vT, html code.shiki .s86vT{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sd2Uz, html code.shiki .sd2Uz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sIEYB, html code.shiki .sIEYB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .syuKq, html code.shiki .syuKq{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .swgpB, html code.shiki .swgpB{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sK9QF, html code.shiki .sK9QF{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}html pre.shiki code .s8pZq, html code.shiki .s8pZq{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sPKOg, html code.shiki .sPKOg{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .smPcV, html code.shiki .smPcV{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":1657,"searchDepth":1706,"depth":1706,"links":3686},[3687,3688,3689,3690,3691,3692,3693,3694,3695],{"id":1528,"depth":1706,"text":1529},{"id":1620,"depth":1706,"text":1621},{"id":2044,"depth":1706,"text":2045},{"id":2713,"depth":1706,"text":2714},{"id":2890,"depth":1706,"text":2891},{"id":3176,"depth":1706,"text":3177},{"id":3327,"depth":1706,"text":3328},{"id":3384,"depth":1706,"text":3385},{"id":3461,"depth":1706,"text":3462},"掌握 Vue3 如何用 Proxy 实现 reactive，理解拦截读写、懒代理与缓存的设计，以及它解决了 Vue2 的哪些局限。","md",null,{},{"title":1434},{"title":1521,"description":3696},"0R7CuKbQOr",[3704,3706],{"title":1430,"path":1431,"stem":1432,"description":3705,"children":-1},"读懂 createApp 返回的 app 是什么，掌握 mount 从创建 vnode 到首次渲染的完整流程。",{"title":1438,"path":1439,"stem":1440,"description":3707,"children":-1},"掌握 Vue3 响应式中 effect 的作用，理解 track 依赖收集与 trigger 触发更新的完整实现。",1784715112626]