[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f20CTc0q_X1nyRuruam9MN8ttFNjGmtJDLUe4rLznaRM":3,"donations-sidebar":9,"posts-{\"page\":1,\"pageSize\":10,\"tagId\":\"62b94c93-724f-488d-8fc5-0449971d9204\"}":10,"sidebar-data":116},{"id":4,"name":5,"slug":6,"createdAt":7,"updatedAt":8},"62b94c93-724f-488d-8fc5-0449971d9204","Vue3","vue3","2022-05-21T09:59:55.000Z","2023-02-08T02:49:14.000Z",[],{"list":11,"total":113,"page":114,"pageSize":115},[12,33,47,60,73,86,100],{"id":13,"title":14,"slug":15,"content":16,"excerpt":14,"coverImage":17,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":21,"publishedAt":22,"createdAt":22,"updatedAt":23,"category":24,"author":28,"tags":31},"28222724-83c2-4a36-ac5d-12aabbfa83b0","Nuxt3最强SEO攻略","nuxt3最强seo攻略","## 使用useFetch服务端渲染请求方式\n> 方便搜索引擎可以解析网站的html，vue构建的项目是客户端渲染，无法解析\n### 官方文档\n```html\nhttps:\u002F\u002Fnuxt.com\u002Fdocs\u002Fapi\u002Fcomposables\u002Fuse-fetch\n```\n\n\n## 正确设置网站的TDK信息\n```language\nuseServerSeoMeta({\n  title: \\\"首页\\\",\n  description: \\\"欢迎来到小白龙博客\\\",\n  keywords: `${data.rows.map((item: any) => item.title)}`,\n});\n```\n\n\n## 各大搜索引擎平台\n### 百度搜索\n> 添加网站地图\n```language\nhttps:\u002F\u002Fziyuan.baidu.com\u002Flinksubmit\u002Findex?site=https:\u002F\u002Fxiaolong0418.com\u002F\n```\n![](https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002Fa73564c2d3da46f24e7f0f6614f35590.png)\n\n### 谷歌搜索\n> 添加网站地图\n\n```language\nhttps:\u002F\u002Fsearch.google.com\u002Fsearch-console\u002Fsitemaps?resource_id=sc-domain%3Axiaolong0418.com&hl=zh-CN\n```\n![](https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F96332c34d3f91760626963acce85dd69.png)\n\n\n\n### 搜狗搜索\n> 添加网站地图\n```language\nhttps:\u002F\u002Fzhanzhang.sogou.com\u002Findex.php\u002Fsitelink\u002Findex\n```\n![](https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F7d00eb3aa12ea772ca9db31bb5973b1d.png)\n\n\n\n### 360搜索\n> 添加网站地图\n```language\nhttps:\u002F\u002Fzhanzhang.so.com\u002Fsitetool\u002Fsitemap\n```\n![](https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002Fc46cfde75c0dd98e8e5bb1288f235eca.png)\n\n\n## 提高网站整体评分\n> 根据检测报告，对应修改网站问题就可以了\n```language\nhttps:\u002F\u002Fpagespeed.web.dev\u002Fanalysis\u002Fhttps-xiaolong0418-com\u002Fwpb7rnuigu?form_factor=mobile\n```\n\n![](https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002Fda0a72ead6c14ce0ff453de792c4f9c1.png)\n\n\n\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F15085311d6b955a035fe83c168a6bd1a.png","PUBLISHED",false,null,430,"2025-01-24T16:00:19.000Z","2026-06-26T09:54:46.585Z",{"id":25,"name":26,"slug":27},"15ac46ad-edf7-4435-9a64-ff78117d58c5","Vue3 生态","vue3-生态",{"id":29,"name":30,"avatar":20},"f9d0f2de-c700-4f90-b535-afd3dbe78128","Admin",[32],{"id":4,"name":5,"slug":6},{"id":34,"title":35,"slug":36,"content":37,"excerpt":35,"coverImage":38,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":39,"publishedAt":40,"createdAt":40,"updatedAt":41,"category":42,"author":44,"tags":45},"f2274999-5594-4e55-ba6e-e73e6e363903","Vue3技术栈成长指南","vue3技术栈成长指南","## Vue3\n> 一个用于构建 Web 用户界面的平易近人、高性能且多功能的框架。\n\n[Vue3入门到精通教程](https:\u002F\u002Fxiaolong0418.com\u002Fblogs\u002F5)\n\n\n\n## Pina\n> Pinia 是 Vue 的存储库，允许您跨组件\u002F页面共享状态。\n\n[Pinia存储库入门到精通教程](https:\u002F\u002Fxiaolong0418.com\u002Fblogs\u002F1)\n\n\n## Vite\n> 下一代前端工具\n\n[Vite快速入门教程](https:\u002F\u002Fxiaolong0418.com\u002Fblogs\u002F18)\n\n\n## Nuxt3\n> Vue的SSR框架，服务端渲染，有利于SEO优化和提高浏览器渲染速度！\n\n[Nuxt3入门到精通教程](https:\u002F\u002Fxiaolong0418.com\u002Fblogs\u002F15)\n\n## uni-app\n> 多端框架，小程序，h5，App开发\n\n[uni-app入门到精通教程](https:\u002F\u002Fxiaolong0418.com\u002Fblogs\u002F70)","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F6a5565966a2a8d210bc753c52afa7665.png",603,"2023-06-29T07:20:29.000Z","2026-06-26T09:54:47.824Z",{"id":43,"name":5,"slug":6},"5ed5cc62-43ea-49a2-b0b2-38bc7aae52a0",{"id":29,"name":30,"avatar":20},[46],{"id":4,"name":5,"slug":6},{"id":48,"title":49,"slug":50,"content":51,"excerpt":49,"coverImage":52,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":53,"publishedAt":54,"createdAt":54,"updatedAt":55,"category":56,"author":57,"tags":58},"9f33b49b-0785-4404-9a4e-d85937e7fc92","在 vue3 中优雅的使用 jsx\u002Ftsx","在-vue3-中优雅的使用-jsx-tsx","## 安装插件（@vitejs\u002Fplugin-vue-jsx）\n```shell\npnpm add @vitejs\u002Fplugin-vue-jsx -D\n```\n\n## 配置vite.config.ts\n```ts\nimport vueJsx from \\\"@vitejs\u002Fplugin-vue-jsx\\\";\n\nexport default defineConfig({\n  plugins: [\n    vueJsx(),\n  ]\n})\n```\n\n## 插值\n```language\n\u002F\u002F vue3模板语法\n\u003Cspan>{{ a + b }}\u003C\u002Fspan>\n\n\u002F\u002F jsx\u002Ftsx\n\u003Cspan>{ a + b }\u003C\u002Fspan>\n```\n\n\n## class与style 绑定\n\n```ts\n\u002F\u002F 模板字符串\n\u003Cdiv className={`header ${ isBg ? 'headerBg' : '' }`}>header\u003C\u002Fdiv>\n\u002F\u002F数组\n\u003Cdiv class={ [ 'header', isBg && 'headerBg' ] } >header\u003C\u002Fdiv>\n```\n\n```ts\nconst color = 'red'\nconst element = \u003Csapn style={{ color, fontSize: '16px' }}>style\u003C\u002Fsapn>\n```\n\n## 条件渲染\n\n```ts\n   setup() {\n       const isShow = false\n       const element = () => {\n           if (isShow) {\n               return \u003Cspan>我是if\u003C\u002Fspan>\n           } else {\n               return \u003Cspan>我是else\u003C\u002Fspan>\n           }\n       }\n       return () => (\n           \u003Cdiv>\n               \u003Cspan v-show={isShow}>我是v-show\u003C\u002Fspan>\n               {\n                   element()\n               }\n               {\n                   isShow ? \u003Cp>我是三目1\u003C\u002Fp> : \u003Cp>我是三目2\u003C\u002Fp>\n               }\n           \u003Cdiv>\n       )\n   }\n```\n\n## 列表渲染\n```language\nsetup() {\n   const listData = [\n       {name: 'Tom', age: 18},\n       {name: 'Jim', age: 20},\n       {name: 'Lucy', age: 16}\n   ]\n   return () => (\n       \u003Cdiv>\n           \u003Cdiv class={'box'}>\n               \u003Cspan>姓名\u003C\u002Fspan>\n               \u003Cspan>年龄\u003C\u002Fspan>\n           \u003C\u002Fdiv>\n           {\n               prop.listData.map(item => {\n                   return \u003Cdiv class={'box'}>\n                       \u003Cspan>{item.name}\u003C\u002Fspan>\n                       \u003Cspan>{item.age}\u003C\u002Fspan>\n                   \u003C\u002Fdiv>\n               })\n           }\n       \u003C\u002Fdiv>\n   )\n}\n\n```\n\n## 事件处理\n\n```language\nsetup() {\n    const clickBox = val => {\n        console.log(val)\n    }\n    return () => (\n        \u003Cdiv class={'box1'} onClick={() => clickBox('box1')}>\n            \u003Cspan>我是box1\u003C\u002Fspan>\n            \u003Cdiv class={'box2'} onClick={() => clickBox('box2')}>\n                \u003Cspan>我是box2\u003C\u002Fspan>\n                \u003Cdiv class={'box3'} onClick={withModifiers(() => clickBox('box3'), ['stop'])}>我是box3\u003C\u002Fdiv>\n            \u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n    )\n}\n```\n\n## v-model\n\n```ts\n\u002F\u002F 正常写法\n\u003Cinput v-model=\\\"value\\\" \u002F> \u002F\u002F vue\n\u003Cinput v-model={value} \u002F> \u002F\u002F jsx\n\n\u002F\u002F 指定绑定值写法\n\u003Cinput v-model:modelValue=\\\"value\\\" \u002F> \u002F\u002F vue\n\u003Cinput v-model={[value,'modelValue']} \u002F> \u002F\u002F jsx\n\n\u002F\u002F 修饰符写法\n\u003Cinput v-model:modelValue.trim=\\\"value\\\" \u002F> \u002F\u002F vue\n\u003Cinput v-model={[value,'modelValue',['trim']]} \u002F> \u002F\u002F jsx\n```\n\n## slot插槽\n\n### 定义插槽\n```ts\nimport { renderSlot } from \\\"vue\\\"\nexport default defineComponent({\n    \u002F\u002F 从ctx中解构出来 slots\n    setup(props, { slots }) {\n        return () => (\n            \u003Cdiv>\n                { renderSlot(slots, 'default') }\n                { slots.title?.() }\n            \u003C\u002Fdiv>\n        )\n    }\n})\n\n```\n\n### 使用插槽\n\n```ts\nimport Vslot from '.\u002FslotTem'\nexport default defineComponent({\n    setup() {\n        return () => (\n            \u003Cdiv class={'box'}>\n                \u003CVslot v-slots={{\n                    title: () => {\n                        return \u003Cp>我是title插槽\u003C\u002Fp>\n                    },\n                    default: () => {\n                        return \u003Cp>我是default插槽\u003C\u002Fp>\n                    }\n                }} \u002F>\n            \u003C\u002Fdiv>\n        )\n    }\n})\n\n```\n\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F3e4cb0d3df611ee3f57b8ed503e1015e.png",1391,"2023-04-19T09:23:27.000Z","2026-06-26T09:54:47.369Z",{"id":43,"name":5,"slug":6},{"id":29,"name":30,"avatar":20},[59],{"id":4,"name":5,"slug":6},{"id":61,"title":62,"slug":63,"content":64,"excerpt":62,"coverImage":65,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":66,"publishedAt":67,"createdAt":67,"updatedAt":68,"category":69,"author":70,"tags":71},"ff06d6ce-1563-4cd7-bb0b-dced85030a59","Vue3不同构建版本的区别和使用","vue3不同构建版本的区别和使用","## 介绍\n> 当我们通过npm i vue@next安装了vue3之后，可以看到node_modules\u002Fvue\u002Fdist目录下有12个构建版本，如果不考虑开发版本和生产版本的区别的话（时候包含.prod），也有7个版本。\n\n## 版本\n| 版本 | 完整版（包括编译器和运行时版本） | 运行时版（runtime）（由于不包括编译器，如果导入的vue是运行时版本，则要求在构建期间就要编译好） | 说明 |\n| - | - | - |- |\n| cjs | .cjs.js |  | CommonJs，有常用在nodejs服务端的一种模块导入标准 |\n| esm-browser | .esm-browser.js | .runtime.esm-browser.js | 用于浏览器通过原生 ES 模块导入使用 |\n| esm-bundler | .esm-bundler.js | .runtime.esm-bundler.js | 用于构建工具（webpack，rollup等）使用原生 ES 模块导入 | \n| global | \t.global.js | .runtime.global.js | 全局变量版本 |","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F787d127b2ba74905b10965cf40c1b147.png",900,"2023-02-24T02:18:45.000Z","2026-05-23T23:31:12.000Z",{"id":25,"name":26,"slug":27},{"id":29,"name":30,"avatar":20},[72],{"id":4,"name":5,"slug":6},{"id":74,"title":75,"slug":76,"content":77,"excerpt":75,"coverImage":78,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":79,"publishedAt":80,"createdAt":80,"updatedAt":81,"category":82,"author":83,"tags":84},"85665df6-cde0-4bba-83ed-76afafb7b3c2","Qrcode二维码生成","qrcode二维码生成","\n## 官网\n```language\nhttps:\u002F\u002Fwww.npmjs.com\u002Fpackage\u002Fqrcode.vue\n```\n\n\n\n## 引用方法\n\n### \n\n\n\n### Vue\n\n### 安装命令\n\n#### Vue2\n```shell \nnpm i -S qrcode.vue@1.7.0\n```\n\n#### Vue3\n```shell \nnpm i -S qrcode.vue\n```\n\n```shell\nimport QrcodeVue from \\\"qrcode.vue\\\";\n```\n\n## 使用方法\n\n```vue\n  \u003Cqrcode-vue\n        value=\\\"WIFI:T:SAE;P::Adm\\;\\;\\;in1\\;\\;\\;234\\;;S::TCL\\;-G的uest\\;\\;\\;\\;-19:4A\\;;H:false;\\\"\n        :size=\\\"200\\\"\n        level=\\\"H\\\"\n  \u002F>\n```\n\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F1657183263272.jpeg",503,"2022-07-07T08:41:42.000Z","2026-05-24T20:32:49.000Z",{"id":25,"name":26,"slug":27},{"id":29,"name":30,"avatar":20},[85],{"id":4,"name":5,"slug":6},{"id":87,"title":88,"slug":89,"content":90,"excerpt":91,"coverImage":92,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":93,"publishedAt":94,"createdAt":94,"updatedAt":95,"category":96,"author":97,"tags":98},"7c83dcc8-adf1-4bb9-9958-cd671040e37f","Vue 视图不更新问题","vue-视图不更新问题","## 1. Vue 无法检测实例被创建时不存在于 data 中的 property\n> 原因：由于 Vue 会在初始化实例时对 property 执行 getter\u002Fsetter 转化，所以 property 必须在 data 对象上存在才能让 Vue 将它转换为响应式的。\n\n> 解决：提前在data定义好数据\n\n## 2. Vue 无法检测对象 property 的添加或移除\n> 原因：官方 - 由于 JavaScript（ES5） 的限制，Vue.js 不能检测到对象属性的添加或删除。因为 Vue.js 在初始化实例时将属性转为 getter\u002Fsetter，所以属性必须在 data 对象上才能让 Vue.js 转换它，才能让它是响应的。\n场景：\n\n\n解决办法：\n```js\n\u002F\u002F 动态添加 \nthis.$set(vm.obj, propertyName, newValue)\n\n\u002F\u002F 动态添加多个\n\u002F\u002F 代替 Object.assign(this.obj, { a: 1, b: 2 })\nthis.obj = Object.assign({}, this.obj, { a: 1, b: 2 })\n\n\u002F\u002F 动态移除 - vm.$delete\nthis.$delete(vm.obj, propertyName)\n```\n\n### 3. Vue 不能检测通过数组索引直接修改一个数组项\n> 原因：官方 - 由于 JavaScript 的限制，Vue 不能检测数组和对象的变化；尤雨溪 - 性能代价和获得用户体验不成正比。\n场景：\n\n解决办法：\n\n```js\nthis.$set(this.items, 1, newValue)\n```\n\n## 4. Vue 不能监测直接修改数组长度的变化\n> 原因：官方 - 由于 JavaScript 的限制，Vue 不能检测数组和对象的变化；尤雨溪 - 性能代价和获得用户体验不成正比。\n\n> 解决: .items.splice(newLength)\n\n## 5. 在异步更新执行之前操作 DOM 数据不会变化\n> 原因：Vue 在更新 DOM 时是异步执行的。只要侦听到数据变化，Vue 将开启一个队列，并缓冲在同一事件循环中发生的所有数据变更。如果同一个 watcher 被多次触发，只会被推入到队列中一次。这种在缓冲时去除重复数据对于避免不必要的计算和 DOM 操作是非常重要的。然后，在下一个的事件循环“tick”中，Vue 刷新队列并执行实际 (已去重的) 工作。Vue 在内部对异步队列尝试使用原生的 Promise.then、MutationObserver 和 setImmediate，如果执行环境不支持，则会采用 setTimeout(fn, 0) 代替。\n> 解决：\n```js\nthis.nextTick( ()=> {\n this.textContent === 'new message' \n})\n```\n\n## 6. 循环嵌套层级太深，视图不更新？\n> 强制更新\n```js\nthis.$forceUpdate()\n```\n\n## 7. 拓展：路由参数变化时，页面不更新（数据不更新）\n> 原因：路由视图组件引用了相同组件时，当路由参会变化时，会导致该组件无法更新，也就是我们常说中的页面无法更新的问题。\n\n> 解决：\n```language\n通过 watch 监听 $route 的变化。\n给 \u003Crouter-view> 绑定 key 属性，这样 Vue 就会认为这是不同的 \u003Crouter-view>。\n```\n\n## 异步更新带来的数据响应式误解\n> 因为vue的dom更新是异步的，即当setter操作发生后，指令并不会立马更新，指令的更新操作会有一个延迟，当指令更新真正执行的时候，此时.text属性已经赋值，所以指令更新模板时得到的是新值\n","Vue 数据更新了但页面没有更新的 7 种情况汇总及延伸总结","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F1656911697456.png",1609,"2022-07-04T05:30:02.000Z","2026-05-25T02:21:49.000Z",{"id":43,"name":5,"slug":6},{"id":29,"name":30,"avatar":20},[99],{"id":4,"name":5,"slug":6},{"id":101,"title":102,"slug":103,"content":104,"excerpt":102,"coverImage":105,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":106,"publishedAt":107,"createdAt":107,"updatedAt":108,"category":109,"author":110,"tags":111},"f0bda1fc-9873-4bf9-b7d3-be0b7752a3b6","Vue3入门到精通教程","vue3入门到精通教程","\n\n> 起初 Vue3.0 暴露变量必须 return 出来，template中才能使用；Vue3.2 中 只需要在 script 标签上加上setup 属性，组件在编译的过程中代码运行的上下文是在setup()函数中，无需return，template可直接使用。都上了Vue3就直接学setup语法糖吧\n\n## 一、文件结构\n\n```vue\n\u003Ctemplate>\n  \u002F\u002F Vue2中，template标签中只能有一个根元素，在Vue3中没有此限制 \n  \u002F\u002F ...\n  \u003Cdiv class=\\\"box\\\">hello linge\u003C\u002Fdiv>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { ref } from \\\"vue\\\";\nconst color = ref(\\\"red\\\");\n\u002F\u002F ...\n\u003C\u002Fscript>\n\n\u003Cstyle lang=\\\"scss\\\" scoped>\n\u002F\u002F 支持CSS变量注入v-bind(color)\n.box {\n  width: 100px;\n  height: 100px;\n  color: v-bind(color);\n}\n\u003C\u002Fstyle>\n```\n\n## 二、data\n\n```vue\n\u003Cscript setup>\nimport { reactive, ref, toRefs } from \\\"vue\\\";\n\n\u002F\u002F ref声明响应式数据，用于声明基本数据类型\nconst name = ref(\\\"小白龙\\\");\n\u002F\u002F 修改\nname.value = \\\"小龙龙\\\";\n\n\u002F\u002F reactive声明响应式数据，用于声明引用数据类型\nconst state = reactive({\n  name: \\\"小白龙\\\",\n  sex: \\\"男\\\",\n});\n\u002F\u002F 修改\nstate.name = \\\"小龙龙\\\";\n\n\u002F\u002F 使用toRefs解构\nconst { name, sex } = toRefs(state);\n\u002F\u002F template可直接使用{{name}}、{{sex}}\n\n\u002F\u002F toRef 是对定义的响应对象的某个属性进行引用,使用一个函数返回一个响应式对象,依旧保持响应式\nconst nameRef = toRef(state, 'name')\n\n\u003C\u002Fscript>\n```\n\n## 获取dom元素\n```language\n \u003Cdiv ref=\\\"myRef\\\">获取单个DOM元素\u003C\u002Fdiv>\n\n \u003Cdiv>获取多个DOM元素\u003C\u002Fdiv>\n   \u003Cul>\n     \u003Cli v-for=\\\"(item, index) in 3\\\" :key=\\\"index\\\" :ref=\\\"setRef\\\">\n       {{ item }}\n     \u003C\u002Fli>\n \u003C\u002Ful>\n\n\u002F\u002F获取单个DOM元素\nconst myRef = ref(null);\n\n\u002F\u002F获取多个DOM元素\n\u002F\u002F 存储dom数组\nconst myRefs = ref([]);\n\nconst setRef = (el) => {\n   myRefs.value.push(el);\n};\n\n```\n\n\n\n\n\n## 三、method\n\n```vue\n\u003Ctemplate>\n  \u002F\u002F 调用方法\n  \u003Cbutton @click=\\\"changeName\\\">按钮\u003C\u002Fbutton>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { reactive } from 'vue'\n\nconst state = reactive({\n  name: '小白龙'\n})\n\n\u002F\u002F 声明method方法\nconst changeName = () => {\n  state.name = '小龙龙'\n}  \n\u003C\u002Fscript>\n```\n\n## 四、computed\n\n```vue\n\u003Cscript setup>\nimport { computed, ref } from 'vue'\n\nconst count = ref(1)\n\n\u002F\u002F 通过computed获得doubleCount\nconst doubleCount = computed(() => {\n  return count.value * 2\n})\n\u003C\u002Fscript>\n```\n\n## 五、watch\n\n### 属性\n- watch 具备一定的惰性\n- 可以拿到原始值和当前值\n- 可以侦听多个数据的变换，用一个侦听器承载\n- 默认开启深度监听\n\n### 传参\n- 第一个参数，需要传递一个需要监听的 function 、ref 、reactive object\n- 第二个参数，用来接受数据原始值和当前值\n- 第三个参数，传递 watch 的高级配置项 例如 immediate: true\n\n```vue\n\u003Cscript setup>\nimport { watch, reactive } from 'vue'\n\n### 监听基础类型\nconst count = ref(0)\nwatch(count, (newValue, oldValue) => {\n  console.log('watch' + newValue, oldValue)\n})\n\n\n\n### 监听复杂类型\nconst boy = reactive({\n  name: '小白龙',\n  friend: {\n    friend1 : '小小龙',\n    friend2 : '小小小龙'\n  }\n})\n\n#### 监听整个对象\nwatch(boy, (newValue, oldValue) => {\n console.log('boy发生了变化')\n console.log(newValue);\n console.log(newValue.friend);\n})\n\nboy.name = 'Little children'\nboy.friend.friend3 = '小王'\n> 第一个参数传入我们要监听的对象，当监听的对象里面的任意一个属性发生变化，watch 方法便会触发。\n\n#### 监听对象中的某个属性\n\n\u002F\u002F 如果我们直接写 boy.name\nwatch(boy.name, (newValue, oldValue) => {\n console.log('boy发生了变化')\n console.log(newValue)\n})\n\n\u002F\u002F vue会提示我们，监听的对象需要是一个 function 或者 ref 或者是一个 reactive object\n\n\u002F\u002F 正确的写法是:\nwatch(() => boy.name, (newValue, oldValue) => {\n console.log('boy发生了变化')\n console.log(newValue)\n})\n\nboy.name = 'Little children'\n\n\n\n#### 监听对象的所有属性\nwatch(() => boy, (newValue, oldValue) => {\n console.log('boy发生了变化')\n console.log(newValue)\n}, {\n immediate: true\u002F\u002F立即执行\n})\n\nboy.name = 'Little children'\n\n#### 监听多个数据\n\n- watch 里面可以接收一个数组\n- 无论数组里面的哪一个数据发生变化，都会执行侦听器\n\n\nwatch([()=> boy.name, count], ([newName, newCount], [oldName, oldCount]) => {\n console.log(newName + '---' + oldName)\n console.log(newCount + '---' + oldCount)\n})\n\nboy.name = 'Little children'\n\n\n\u003C\u002Fscript>\n```\n\n### watchEffect\n#### 属性\n- 立即执行的，没有惰性\n- 不需要传递要侦听的内容，会自动感知代码依赖，不需要传递很多参数，只需要一个回调函数\n- 不能获取之前数据的值\n#### 监听基础类型\n\n```language\nconst count = ref(0)\n\nwatchEffect(() => {\n  console.log(count.value)\n})\n\ncount.value ++\nconst count = ref(0)\n\nwatchEffect(() => {\n  console.log(count.value)\n})\n\ncount.value ++\n```\n\n\n\n\n\n## 六、props父传子\n\n### 子组件\n\n```vue\n\u003Ctemplate>\n  \u003Cspan>{{ props.name }}\u003C\u002Fspan>\n  \u002F\u002F 可省略【props.】\n  \u003Cspan>{{ name }}\u003C\u002Fspan>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n\u002F\u002F import { defineProps } from 'vue'\n\u002F\u002F defineProps在\u003Cscript setup>中自动可用，无需导入\n\u002F\u002F 需在.eslintrc.js文件中【globals】下配置【defineProps: true】\n\n\u002F\u002F 声明props\nconst props = defineProps({\n  name: {\n    type: String,\n    default: ''\n  }\n})  \n\u003C\u002Fscript>\n```\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u003Cchild name=\\\"Jerry\\\" \u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n\u002F\u002F 引入子组件(组件自动注册)\nimport child from '.\u002Fchild.vue'\n\u003C\u002Fscript>\n```\n\n## 七、emit子传父\n\n### 子组件\n\n```vue\n\u003Ctemplate>\n  \u003Cspan>{{ props.name }}\u003C\u002Fspan>\n  \u002F\u002F 可省略【props.】\n  \u003Cspan>{{ name }}\u003C\u002Fspan>\n  \u003Cbutton @click=\\\"changeName\\\">更名\u003C\u002Fbutton>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n\u002F\u002F import { defineEmits, defineProps } from 'vue'\n\u002F\u002F defineEmits和defineProps在\u003Cscript setup>中自动可用，无需导入\n\u002F\u002F 需在.eslintrc.js文件中【globals】下配置【defineEmits: true】、【defineProps: true】\n\n\u002F\u002F 声明props\nconst props = defineProps({\n  name: {\n    type: String,\n    default: ''\n  }\n})\n\u002F\u002F 声明事件\nconst emit = defineEmits(['updateName'])\n\u002F\u002Fts写法\n\u002F\u002Fconst emit = defineEmits\u003C{\n\u002F\u002F    (e: 'updateName', name: string): void\n\u002F\u002F  }>()\n\nconst changeName = () => {\n  \u002F\u002F 执行\n  emit('updateName', '小龙龙')\n}\n\u003C\u002Fscript>\n```\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u003Cchild :name=\\\"state.name\\\" @updateName=\\\"updateName\\\" \u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { reactive } from 'vue'\n\u002F\u002F 引入子组件\nimport child from '.\u002Fchild.vue'\n\nconst state = reactive({\n  name: '小白龙'\n})\n\n\u002F\u002F 接收子组件触发的方法\nconst updateName = (name) => {\n  state.name = name\n}\n\u003C\u002Fscript>\n```\n\n## 八、v-model\n\n### 子组件\n\n```vue\n\u003Ctemplate>\n  \u003Cspan @click=\\\"changeInfo\\\">我叫{{ modelValue }}，今年{{ age }}岁\u003C\u002Fspan>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n\u002F\u002F import { defineEmits, defineProps } from 'vue'\n\u002F\u002F defineEmits和defineProps在\u003Cscript setup>中自动可用，无需导入\n\u002F\u002F 需在.eslintrc.js文件中【globals】下配置【defineEmits: true】、【defineProps: true】\n\ndefineProps({\n  modelValue: String,\n  age: Number\n})\n\nconst emit = defineEmits(['update:modelValue', 'update:age'])\nconst changeInfo = () => {\n  \u002F\u002F 触发父组件值更新\n  emit('update:modelValue', '小龙龙')\n  emit('update:age', 30)\n}\n\u003C\u002Fscript>\n```\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u002F\u002F v-model:modelValue简写为v-model\n  \u002F\u002F 可绑定多个v-model\n  \u003Cchild v-model=\\\"state.name\\\" v-model:age=\\\"state.age\\\" \u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { reactive } from 'vue'\n\u002F\u002F 引入子组件\nimport child from '.\u002Fchild.vue'\n\nconst state = reactive({\n  name: '小白龙',\n  age: 20\n})\n\u003C\u002Fscript>\n```\n\n## 九、nextTick\n\n```vue\n\u003Cscript setup>\nimport { nextTick } from 'vue'\n\nnextTick(() => {\n  \u002F\u002F ...\n})\n\u003C\u002Fscript>\n```\n\n## 十、子组件ref变量和defineExpose\n\n- 在标准组件写法里，子组件的数据都是默认隐式暴露给父组件的，但在 script-setup 模式下，所有数据只是默认 return 给 template 使用，不会暴露到组件外，所以父组件是无法直接通过挂载 ref 变量获取子组件的数据。\n- 如果要调用子组件的数据，需要先在子组件显示的暴露出来，才能够正确的拿到，这个操作，就是由 defineExpose 来完成。\n\n### 子组件\n\n```vue\n\u003Ctemplate>\n  \u003Cspan>{{ state.name }}\u003C\u002Fspan>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { reactive, toRefs } from 'vue'\n\u002F\u002F defineExpose无需引入\n\u002F\u002F import { defineExpose, reactive, toRefs } from 'vue'\n\n\u002F\u002F 声明state\nconst state = reactive({\n  name: 'Jerry'\n})\n\n\u002F\u002F 将方法、变量暴露给父组件使用，父组件才可通过ref API拿到子组件暴露的数据\ndefineExpose({\n  \u002F\u002F 解构state\n  ...toRefs(state),\n  \u002F\u002F 声明方法\n  changeName() {\n    state.name = '小白龙'\n  }\n})\n\u003C\u002Fscript>\n```\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u003Cchild ref=\\\"childRef\\\" \u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\nimport { ref, nextTick } from 'vue'\n\u002F\u002F 引入子组件\nimport child from '.\u002Fchild.vue'\n\n\u002F\u002F 子组件ref\nconst childRef = ref('childRef')\n\n\u002F\u002F nextTick\nnextTick(() => {\n  \u002F\u002F 获取子组件name\n  console.log(childRef.value.name)\n  \u002F\u002F 执行子组件方法\n  childRef.value.changeName()\n})\n\u003C\u002Fscript>\n```\n\n## 十、插槽slot\n\n### 子组件\n\n```vue\n\u003Ctemplate>\n  \u002F\u002F 匿名插槽\n  \u003Cslot\u002F>\n  \u002F\u002F 具名插槽\n  \u003Cslot name='title'\u002F>\n  \u002F\u002F 作用域插槽\n  \u003Cslot name=\\\"footer\\\" :scope=\\\"state\\\" \u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n  import { useSlots, reactive } from 'vue'\n  const state = reactive({\n    name: '小白龙',\n    age: '18岁'\n  })\n  \n  const slots = useSlots()\n  \u002F\u002F 匿名插槽使用情况\n  const defaultSlot = reactive(slots.default && slots.default().length)\n  console.log(defaultSlot) \u002F\u002F 1\n  \u002F\u002F 具名插槽使用情况\n  const titleSlot = reactive(slots.title && slots.title().length)\n  console.log(titleSlot) \u002F\u002F 3\n\u003C\u002Fscript>\n```\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u003Cchild>\n    \u002F\u002F 匿名插槽\n    \u003Cspan>我是默认插槽\u003C\u002Fspan>\n    \u002F\u002F 具名插槽\n    \u003Ctemplate #title>\n      \u003Ch1>我是具名插槽\u003C\u002Fh1>\n      \u003Ch1>我是具名插槽\u003C\u002Fh1>\n      \u003Ch1>我是具名插槽\u003C\u002Fh1>\n    \u003C\u002Ftemplate>\n    \u002F\u002F 作用域插槽\n    \u003Ctemplate #footer=\\\"{ scope }\\\">\n      \u003Cfooter>作用域插槽——姓名：{{ scope.name }}，年龄{{ scope.age }}\u003C\u002Ffooter>\n    \u003C\u002Ftemplate>\n  \u003C\u002Fchild> \n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n  \u002F\u002F 引入子组件\n  import child from '.\u002Fchild.vue'\n\u003C\u002Fscript>\n```\n\n## 将某个.vue组件挂载到根节点\n```vue\n  \u003Cteleport to=\\\"#app\\\">\n    \u003CChannelProgress :show=\\\"isShow\\\" @updateShow=\\\"updateShow\\\" \u002F>\n  \u003C\u002Fteleport>\n```\n\n## KeepAlive\n> \u003CKeepAlive>是一个内置组件，允许我们在多个组件之间动态切换时，有条件地缓存组件实例。\n```js\n\u003CKeepAlive>\n  \u003Ccomponent :is=\\\"activeComponent\\\" \u002F>\n\u003C\u002FKeepAlive>\n```\n### 属性\n- include 排查\n> include=\\\"a,b\\\"\n:include=\\\"\u002Fa|b\u002F\\\"\n:include=\\\"['a', 'b']\\\"\n\n- max 最大缓存实例数\n> :max=\\\"10\\\"\n\n- 缓存实例的生命周期\n\n```js\n\u002F\u002F创建\n activated() {\n\n  },\n\u002F\u002F销毁\n  deactivated() {\n    \u002F\u002F called when removed from the DOM into the cache\n    \u002F\u002F and also when unmounted\n  }\n```\n\n## vue全局方法\u002F变量（不推荐这样子使用）\n> 只要创建一个createApp(App)，然后用app变量接受就好\n> main.ts\n```ts\nconst app = createApp(App);\n\n\u002F\u002F全局方法\napp.config.globalProperties.$name1 = '小白龙';\n```\n\n> 使用\n```ts\n  const { proxy } = getCurrentInstance() as any;\n  console.log(111, proxy.$name1);\u002F\u002F小白龙\n```\n\n\n\n\n\n## 十二、路由useRoute和useRouter\n\n```vue\n\u003Cscript setup>\n  import { useRoute, useRouter } from 'vue-router'\n\t\n  \u002F\u002F 必须先声明调用\n  const route = useRoute()\n  const router = useRouter()\n\t\n  \u002F\u002F 路由信息\n  console.log(route.query)\n\n  \u002F\u002F 路由跳转\n  router.push('\u002FnewPage')\n\u003C\u002Fscript>\n```\n\n## 十三、路由导航守卫\n\n```vue\n\u003Cscript setup>\n  import { onBeforeRouteLeave, onBeforeRouteUpdate } from 'vue-router'\n\t\n  \u002F\u002F 添加一个导航守卫，在当前组件将要离开时触发。\n  onBeforeRouteLeave((to, from, next) => {\n    next()\n  })\n\n  \u002F\u002F 添加一个导航守卫，在当前组件更新时触发。\n  \u002F\u002F 在当前路由改变，但是该组件被复用时调用。\n  onBeforeRouteUpdate((to, from, next) => {\n    next()\n  })\n\u003C\u002Fscript>\n```\n\n## 十四、store\n\n*Vue3 中的Vuex不再提供辅助函数写法\n\n```vue\n\u003Cscript setup>\n  import { useStore } from 'vuex'\n  import { key } from '..\u002Fstore\u002Findex'\n\n  \u002F\u002F 必须先声明调用\n  const store = useStore(key)\n\t\n  \u002F\u002F 获取Vuex的state\n  store.state.xxx\n\n  \u002F\u002F 触发mutations的方法\n  store.commit('fnName')\n\n  \u002F\u002F 触发actions的方法\n  store.dispatch('fnName')\n\n  \u002F\u002F 获取Getters\n  store.getters.xxx\n\u003C\u002Fscript>\n```\n\n## 十五、生命周期\n\n通过在生命周期钩子前面加上 “on” 来访问组件的生命周期钩子。\n\n下表包含如何在 Option API 和 setup() 内部调用生命周期钩子\n\n| **Option API**  | **setup中**       |\n| --------------- | ----------------- |\n| beforeCreate    | 不需要            |\n| created         | 不需要            |\n| beforeMount     | onBeforeMount     |\n| mounted         | onMounted         |\n| beforeUpdate    | onBeforeUpdate    |\n| updated         | onUpdated         |\n| beforeUnmount   | onBeforeUnmount   |\n| unmounted       | onUnmounted       |\n| errorCaptured   | onErrorCaptured   |\n| renderTracked   | onRenderTracked   |\n| renderTriggered | onRenderTriggered |\n| activated       | onActivated       |\n| deactivated     | onDeactivated     |\n\n## 十六、CSS变量注入\n\n```vue\n\u003Ctemplate>\n  \u003Cspan>Jerry\u003C\u002Fspan>  \n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n  import { reactive } from 'vue'\n\n  const state = reactive({\n    color: 'red'\n  })\n\u003C\u002Fscript>\n  \n\u003Cstyle scoped>\n  span {\n    \u002F\u002F 使用v-bind绑定state中的变量\n    color: v-bind('state.color');\n  }  \n\u003C\u002Fstyle>\n```\n\n## 十七、原型绑定与组件内使用\n\n### main.js\n\n```js\nimport { createApp } from 'vue'\nimport App from '.\u002FApp.vue'\nconst app = createApp(App)\n\n\u002F\u002F 获取原型\nconst prototype = app.config.globalProperties\n\n\u002F\u002F 绑定参数\nprototype.name = 'Jerry'\n```\n\n### 组件内使用\n\n```vue\n\u003Cscript setup>\n  import { getCurrentInstance } from 'vue'\n\n  \u002F\u002F 获取原型\n  const { proxy } = getCurrentInstance()\n  \n  \u002F\u002F 输出\n  console.log(proxy.name)\n\u003C\u002Fscript>\n```\n\n## 十八、对 await 的支持\n\n不必再配合 async 就可以直接使用 await 了，这种情况下，组件的 setup 会自动变成 async setup 。\n\n```vue\n\u003Cscript setup>\n  const post = await fetch('\u002Fapi').then(() => {})\n\u003C\u002Fscript>\n```\n\n## 十九、定义组件的name\n\n用单独的`\u003Cscript>`块来定义\n\n```vue\n\u003Cscript>\n  export default {\n    name: 'ComponentName',\n  }\n\u003C\u002Fscript>\n```\n\n## 二十、provide和inject\n\n### 父组件\n\n```vue\n\u003Ctemplate>\n  \u003Cchild\u002F>\n\u003C\u002Ftemplate>\n\n\u003Cscript setup>\n  import { provide } from 'vue'\n  import { ref, watch } from 'vue'\n  \u002F\u002F 引入子组件\n  import child from '.\u002Fchild.vue'\n\n  let name = ref('Jerry')\n  \u002F\u002F 声明provide\n  provide('provideState', {\n    name,\n    changeName: () => {\n      name.value = 'Tom'\n    }\n  })\n\n  \u002F\u002F 监听name改变\n  watch(name, () => {\n    console.log(`name变成了${name}`)\n    setTimeout(() => {\n      console.log(name.value) \u002F\u002F Tom\n    }, 1000)\n  })\n\u003C\u002Fscript>\n```\n\n### 子组件\n\n```vue\n\u003Cscript setup>\n  import { inject } from 'vue'\n\t\u002F\u002F 注入\n  const provideState = inject('provideState')\n  \n  \u002F\u002F 子组件触发name改变\n  provideState.changeName()\n\u003C\u002Fscript>\n```\n\n## 二十一、Vue3中使用echarts\n\n```js\n\u002F\u002F 安装\nnpm i echarts --save\n\n\u002F\u002F 组件内引入\nimport * as echarts from 'echarts'\n```\n\n\n## 自定义指令实现按钮防抖\n> 监听按钮的点击事件,给点击事件设置防抖，如果特定时间段内多次提交，则每以最后一次重新计算时间。\n\n### 代码实现\n> src\u002Fdirectives\u002FpreReClick.ts\n```js\nexport default (app) => {\n  app.directive('preReClick', {\n    mounted(el, binding) {\n      el.addEventListener('click', () => {\n        if (!el.disabled) {\n          el.disabled = true;\n          setTimeout(() => {\n            el.disabled = false;\n          }, binding.value || 2000)\n        }\n      })\n    }\n  })\n}\n```\n### 在main.js中引入指令文件\n```language\nimport preReClick from '@\u002Fdirectives\u002FpreReClick';\n\nconst app = createApp(App);\napp.use(ElementPlus).use(preReClick).mount('#app');\n```\n### 组件中使用\n\n```language\n  \u003Cbutton @click=\\\"confirm\\\" v-preReClick>点我点我\u003C\u002Fbutton>\n```\n\n\n## 全局消息弹框封装\n> Tips.vue\n```language\n\u003Ctemplate>\n    \u003Cdiv class=\\\"tips\\\">\n        \u003Cdiv class=\\\"box\\\" :class=\\\"type\\\">\n            \u003Csvg class=\\\"iconpark-icon\\\">\u003Cuse :href=\\\"icontype\\\">\u003C\u002Fuse>\u003C\u002Fsvg>\n            \u003Cspan>{{ title }}\u003C\u002Fspan>\n        \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\u003C\u002Ftemplate>\n\n\u003Cscript lang=\\\"ts\\\" setup>\nimport { defineProps, computed } from 'vue';\n\ninterface Props {\n    type: string;\n    title: string;\n}\n\nconst props: Props = defineProps({\n    type: {\n        type: String,\n        default: 'success'\n    },\n    title: {\n        type: String,\n        default: ''\n    }\n});\n\nconst icontype = computed(() => {\n    const type = {\n        success: '#gou',\n        warning: '#zu2141',\n        error: '#4',\n        info: '#gou',\n        hint: 'icon-tishi'\n    };\n    return type[props.type];\n});\n\u003C\u002Fscript>\n\n\u003Cstyle lang=\\\"scss\\\" scoped>\n.tips {\n    z-index: 9999;\n    position: fixed;\n    top: 100px;\n    left: 50%;\n    transform: translateX(-50%);\n    animation: tipsTop 1s;\n    overflow: hidden;\n    box-shadow: 0 1px 20px 0 rgba(153, 153, 153, 0.5);\n    .box {\n        width: fit-content;\n        height: 80px;\n        display: flex;\n        align-items: center;\n        background-color: #ffffff;\n        box-shadow: 0 1px 20px 0 rgba(153, 153, 153, 0.5);\n        border-radius: 4px;\n        padding: 0 42px;\n        .iconpark-icon {\n            width: 30px;\n            height: 30px;\n            margin-right: 10px;\n        }\n        span {\n            max-width: 1000px;\n            font-size: 18px;\n            font-weight: normal;\n            font-stretch: normal;\n            letter-spacing: 2px;\n            overflow: hidden;\n            white-space: nowrap;\n            text-overflow: ellipsis;\n        }\n    }\n    .success {\n        color: #0173cd;\n    }\n    .warning {\n        color: #ff9800;\n    }\n    .error {\n        color: #c73741;\n    }\n    .info {\n        color: #777777;\n    }\n    .hint {\n        color: #fd4d4d;\n    }\n}\n\n\u002F\u002F 动画\n@keyframes tipsTop {\n    0% {\n        top: -10px;\n    }\n\n    100% {\n        top: 100px;\n    }\n}\n\u003C\u002Fstyle>\n\n\n```\n> Tips.ts\n```ts\nimport { createVNode, render } from 'vue';\nimport Tips from '.\u002FTips.vue';\n\nconst div = document.createElement('div');\ndiv.setAttribute('class', 'tips');\ndocument.body.appendChild(div);\n\nlet timer: number;\n\nexport default ({ type, title }: { type: string; title: string }) => {\n    const vnode = createVNode(Tips, { type, title });\n    render(vnode, div);\n    timer && clearTimeout(timer);\n    timer = setTimeout(() => {\n        render(null, div);\n    }, 2000);\n};\n\n\n```\n> 使用\n```language\nimport Tips from '@\u002Fcomponents\u002FTips\u002FTips';\nTips({ type: 'success', title: '新建素材成功' });\n```\n\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F7060ae3f0a286faf6059839f27fcbb38.png",1633,"2022-05-24T01:54:49.000Z","2026-05-24T20:24:05.000Z",{"id":43,"name":5,"slug":6},{"id":29,"name":30,"avatar":20},[112],{"id":4,"name":5,"slug":6},7,1,10,{"categories":117,"tags":196,"postCount":378,"tagCount":379,"hotPosts":380},[118,125,128,135,141,145,152,156,162,166,170,175,181,186,190],{"id":119,"name":120,"slug":121,"description":122,"sortOrder":123,"createdAt":124,"updatedAt":124,"postCount":114},"e8d0bd45-d10c-46d3-8afb-0c072df7f8a7","技术","tech","技术文章",0,"2026-06-27T04:18:37.371Z",{"id":25,"name":26,"slug":27,"description":26,"sortOrder":114,"createdAt":126,"updatedAt":8,"postCount":127},"2022-05-21T08:05:39.000Z",6,{"id":129,"name":130,"slug":131,"description":130,"sortOrder":132,"createdAt":133,"updatedAt":8,"postCount":134},"11d4d397-685c-4180-a7b3-9b0e3a1e411e","Css","css",2,"2022-05-23T07:19:37.000Z",9,{"id":136,"name":137,"slug":137,"description":137,"sortOrder":138,"createdAt":139,"updatedAt":8,"postCount":140},"d10456a5-e649-4741-a38f-f07f266ce5f2","开发环境",3,"2022-05-24T01:52:41.000Z",13,{"id":43,"name":5,"slug":6,"description":5,"sortOrder":142,"createdAt":143,"updatedAt":8,"postCount":144},4,"2022-05-24T01:55:05.000Z",8,{"id":146,"name":147,"slug":148,"description":147,"sortOrder":149,"createdAt":150,"updatedAt":8,"postCount":151},"da130ba9-d4f4-49f3-aa0f-149078097ef0","JavaScript","javascript",5,"2022-05-24T02:22:57.000Z",18,{"id":153,"name":154,"slug":154,"description":154,"sortOrder":127,"createdAt":155,"updatedAt":8,"postCount":114},"d8cbe380-54b3-4a61-a12d-5438c2918574","限时优惠","2022-05-25T07:18:03.000Z",{"id":157,"name":158,"slug":159,"description":158,"sortOrder":113,"createdAt":160,"updatedAt":8,"postCount":161},"e0f3b8d8-cfe7-41fb-802b-a79699d95968","JavaScript插件","javascript插件","2022-06-01T14:08:31.000Z",16,{"id":163,"name":164,"slug":164,"description":164,"sortOrder":144,"createdAt":165,"updatedAt":8,"postCount":127},"4ea3d8af-9cc3-49bb-a9cd-34dbcdc3bd85","构建工具","2022-06-02T07:28:13.000Z",{"id":167,"name":168,"slug":168,"description":168,"sortOrder":134,"createdAt":169,"updatedAt":8,"postCount":144},"9ed9827c-9cbb-42da-80e4-d04c7fdba886","开发工具","2022-06-21T03:35:05.000Z",{"id":171,"name":172,"slug":173,"description":172,"sortOrder":115,"createdAt":174,"updatedAt":8,"postCount":149},"6b9179c3-17b2-43ff-a431-a03d6eb32d89","Vue2 生态","vue2-生态","2022-07-16T13:14:29.000Z",{"id":176,"name":177,"slug":178,"description":177,"sortOrder":179,"createdAt":180,"updatedAt":8,"postCount":149},"73a5f62c-3c47-45b9-9ae2-f29953ae8dc0","Node","node",11,"2022-07-16T13:15:39.000Z",{"id":182,"name":183,"slug":183,"description":183,"sortOrder":184,"createdAt":185,"updatedAt":8,"postCount":132},"2b696c16-48ef-403b-a88b-6e57cfc79596","开发问题",12,"2022-07-16T14:06:54.000Z",{"id":187,"name":188,"slug":188,"description":188,"sortOrder":140,"createdAt":189,"updatedAt":8,"postCount":114},"c0f0561e-a47a-4ecd-8caa-cc1df2315d57","算法","2022-07-16T14:22:34.000Z",{"id":191,"name":192,"slug":193,"description":192,"sortOrder":194,"createdAt":195,"updatedAt":8,"postCount":138},"a629c1f7-29f1-439e-be3c-29670b17ba20","Vue2","vue2",15,"2022-07-16T14:41:51.000Z",[197,203,208,210,215,220,224,228,233,238,243,248,251,256,260,264,269,274,279,284,288,292,296,297,301,306,311,314,317,320,323,326,330,333,335,337,340,344,347,351,355,358,361,363,366,368,372,375],{"id":198,"name":199,"slug":200,"createdAt":201,"updatedAt":202},"076bd8b9-293e-45cb-9dc3-e162007ca474","Axios","axios","2022-06-05T07:41:56.000Z","2025-12-30T07:26:21.000Z",{"id":204,"name":205,"slug":206,"createdAt":207,"updatedAt":8},"2aa7f6d0-1fac-4ed1-b9bb-f3afc813f42c","Axure","axure","2022-06-21T03:35:15.000Z",{"id":209,"name":130,"slug":131,"createdAt":7,"updatedAt":8},"b084ddd8-09be-4e57-98f0-cf4e376aecd7",{"id":211,"name":212,"slug":213,"createdAt":214,"updatedAt":8},"78a62bff-ff77-4878-8c25-3e6aae18c668","Docker","docker","2022-07-16T14:34:37.000Z",{"id":216,"name":217,"slug":218,"createdAt":219,"updatedAt":8},"2de16806-ef3f-4e54-a259-d1e1e182468c","Git","git","2022-07-16T14:25:15.000Z",{"id":221,"name":222,"slug":223,"createdAt":7,"updatedAt":8},"994cc226-578b-4a72-a57e-a47a63d2793e","JavaScript生态","javascript生态",{"id":225,"name":226,"slug":227,"createdAt":7,"updatedAt":8},"5086e93c-23b9-43d3-9643-cc87f0e9ee94","JenKins","jenkins",{"id":229,"name":230,"slug":231,"createdAt":232,"updatedAt":8},"b73007a8-bb5c-42a8-9fd9-163033a5b45d","Linux","linux","2022-07-16T14:40:17.000Z",{"id":234,"name":235,"slug":236,"createdAt":237,"updatedAt":8},"0b658b92-dd6b-4db3-a398-9f6d69950a02","Markdown","markdown","2022-07-16T14:39:25.000Z",{"id":239,"name":240,"slug":241,"createdAt":242,"updatedAt":8},"ab034d3a-6e5b-4db5-a2dc-faf4ccbb63f5","Nest","nest","2022-07-16T13:15:49.000Z",{"id":244,"name":245,"slug":246,"createdAt":247,"updatedAt":8},"52c41978-da06-4962-9636-45bbaeedda80","Nginx","nginx","2022-05-21T09:59:56.000Z",{"id":249,"name":250,"slug":250,"createdAt":247,"updatedAt":8},"0f1cc678-40e4-44b1-b2cf-a6fd8a1c867a","npm",{"id":252,"name":253,"slug":254,"createdAt":255,"updatedAt":8},"a4370d78-70e1-4073-a8f6-3dc5d81fd8fd","Nuxt","nuxt","2022-06-01T13:07:07.000Z",{"id":257,"name":258,"slug":259,"createdAt":7,"updatedAt":8},"d232e01f-048e-4151-8a0a-fff9561f946f","Pinia","pinia",{"id":261,"name":262,"slug":263,"createdAt":247,"updatedAt":8},"14e9ab02-b0bb-4c85-8604-fe6f1f0f33cd","Pnpm","pnpm",{"id":265,"name":266,"slug":267,"createdAt":268,"updatedAt":268},"399d1d38-cc0d-43ce-8baf-c769447a2ebd","React生态","react生态","2023-02-21T02:03:09.000Z",{"id":270,"name":271,"slug":272,"createdAt":273,"updatedAt":8},"c95bbe84-bdd0-410a-86a9-e87958c55f4f","Redis","redis","2022-10-05T05:14:14.000Z",{"id":275,"name":276,"slug":277,"createdAt":278,"updatedAt":8},"6d05f9df-e116-450f-af57-85ed710c4870","Swiper","swiper","2022-06-01T14:08:46.000Z",{"id":280,"name":281,"slug":282,"createdAt":283,"updatedAt":8},"66f3aeb0-84ef-45f6-a43a-944eefc9895a","Vite","vite","2022-06-02T07:28:24.000Z",{"id":285,"name":286,"slug":287,"createdAt":7,"updatedAt":8},"bf5b94d3-090b-4098-a03c-4bc69781fb2d","Vue","vue",{"id":289,"name":290,"slug":291,"createdAt":247,"updatedAt":8},"2f7fb1be-b9c5-4606-b54f-e9f66f2653b2","Vue-Router","vue-router",{"id":293,"name":294,"slug":295,"createdAt":7,"updatedAt":8},"2fef3b91-1c1c-4ae8-b2c1-0e04b4f9b3a2","Vue2生态","vue2生态",{"id":4,"name":5,"slug":6,"createdAt":7,"updatedAt":8},{"id":298,"name":299,"slug":300,"createdAt":7,"updatedAt":8},"20bff9cd-7848-4c16-8775-42cf12b44b30","Vue3生态","vue3生态",{"id":302,"name":303,"slug":304,"createdAt":305,"updatedAt":8},"c807b2c6-cb12-4409-a1f1-6bea9f330a6b","Vuex","vuex","2022-07-16T13:14:59.000Z",{"id":307,"name":308,"slug":309,"createdAt":310,"updatedAt":8},"5782dff5-2ea2-4427-9696-d4363a7fd5bc","Webpack","webpack","2022-07-16T14:33:41.000Z",{"id":312,"name":313,"slug":313,"createdAt":7,"updatedAt":8},"d0aa41f4-68f8-48d4-a4ed-3a503ea90451","下载",{"id":315,"name":316,"slug":316,"createdAt":7,"updatedAt":8},"a046060c-39ef-474a-8c85-2546aca0e2e5","代码片段",{"id":318,"name":319,"slug":319,"createdAt":7,"updatedAt":8},"fee73435-b2be-4b55-85b1-d133ea96aea4","伪元素",{"id":321,"name":322,"slug":322,"createdAt":7,"updatedAt":8},"436bd369-8c57-4869-8827-e88e50e5e0ab","伪类",{"id":324,"name":325,"slug":325,"createdAt":7,"updatedAt":8},"4c6be544-8a00-4445-92a3-e3dcbaf6142e","动画",{"id":327,"name":328,"slug":328,"createdAt":329,"updatedAt":8},"9321a12e-ea72-49a9-a32d-5566149f812f","图片压缩","2022-08-02T00:37:47.000Z",{"id":331,"name":332,"slug":332,"createdAt":247,"updatedAt":8},"512b16fb-576a-4397-a7c5-dd20e6a8f9ca","布局",{"id":334,"name":168,"slug":168,"createdAt":7,"updatedAt":8},"f32faa96-f2ec-45c6-9a17-2c76062edcb0",{"id":336,"name":137,"slug":137,"createdAt":7,"updatedAt":8},"3c46ed3f-6d6b-4f91-bcb3-af5112860bf5",{"id":338,"name":339,"slug":339,"createdAt":7,"updatedAt":8},"dbfc086a-73a6-4560-814d-593acb61cf98","性能优化",{"id":341,"name":342,"slug":342,"createdAt":343,"updatedAt":8},"1831cd06-0d6b-48f7-94fa-324782fe23cb","拖拽","2022-07-28T12:39:13.000Z",{"id":345,"name":346,"slug":346,"createdAt":247,"updatedAt":8},"9a74300d-06f7-46d0-80d9-8fe67ec0539b","数组",{"id":348,"name":349,"slug":349,"createdAt":350,"updatedAt":8},"19ac8998-7e0a-459b-9702-bb1adca70e8c","文本复制","2022-07-17T01:54:45.000Z",{"id":352,"name":353,"slug":353,"createdAt":354,"updatedAt":8},"5ff33473-71a4-4e02-8c82-f9ea369a768f","时间","2022-07-17T01:51:12.000Z",{"id":356,"name":357,"slug":357,"createdAt":7,"updatedAt":8},"aa47ca4d-d3f6-4cac-b495-2c67c9592c36","最新优惠",{"id":359,"name":360,"slug":360,"createdAt":247,"updatedAt":8},"f6766d54-54fc-405e-932d-b7d550559125","服务器",{"id":362,"name":164,"slug":164,"createdAt":7,"updatedAt":8},"d856559a-03ff-40b4-980d-3f272b998c3c",{"id":364,"name":365,"slug":365,"createdAt":7,"updatedAt":8},"692d5d68-b188-4e5c-aca8-65d0229399a1","渐变",{"id":367,"name":188,"slug":188,"createdAt":7,"updatedAt":8},"38e1fd6b-d7c6-4d62-bf70-7bacc175bea9",{"id":369,"name":370,"slug":370,"createdAt":371,"updatedAt":8},"be7b10bc-49eb-4a03-bea7-ceb915d500fe","规范","2022-07-16T14:41:06.000Z",{"id":373,"name":374,"slug":374,"createdAt":247,"updatedAt":8},"b42e2916-ad62-4b8a-a863-cd8c19a829de","面试",{"id":376,"name":377,"slug":377,"createdAt":247,"updatedAt":8},"7069add9-b636-44f1-9cd4-ea3a6d2b85d3","面试题",104,48,[381,393,405,410,423],{"id":382,"title":383,"slug":383,"content":384,"excerpt":383,"coverImage":385,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":386,"publishedAt":387,"createdAt":387,"updatedAt":388,"category":389,"author":390,"tags":391},"a1bd1f49-6f6d-4fea-9789-b5636e19a6b3","uni-app瀑布流","## 实现思路\n> 获取父组件的列表数组，watch监听数组长度变化，截取后面新的数据，创建两个左右数组，比较左右dom的长度，哪个短，就push一条数据进去，源数组删除一条数据。利用img的load（加载成功）和error方法（加载失败），触发数组的push，实现瀑布流\n\n## 代码实现\n\n```language\n\u003Ctemplate>\n    \u003Cview class=\\\"waterfall\\\">\n        \u003Cview class=\\\"waterfall_left\\\">\n            \u003Cview class=\\\"waterfall_list\\\" v-for=\\\"(item, index) in leftList\\\" :key=\\\"index\\\">\n                \u003CSearch\n                    :name=\\\"item.name\\\"\n                    :image=\\\"item.src\\\"\n                    :label=\\\"item.label\\\"\n                    :item=\\\"item\\\"\n                    @considerPush=\\\"considerPush\\\"\n                >\n                \u003C\u002FSearch>\n            \u003C\u002Fview>\n        \u003C\u002Fview>\n        \u003Cview class=\\\"waterfall_right\\\">\n            \u003Cview class=\\\"waterfall_list\\\" v-for=\\\"(item, index) in rightList\\\" :key=\\\"index\\\">\n                \u003CSearch\n                    :name=\\\"item.name\\\"\n                    :image=\\\"item.src\\\"\n                    :label=\\\"item.label\\\"\n                    :item=\\\"item\\\"\n                    @considerPush=\\\"considerPush\\\"\n                >\n                \u003C\u002FSearch>\n            \u003C\u002Fview>\n        \u003C\u002Fview>\n    \u003C\u002Fview>\n\u003C\u002Ftemplate>\n\n\u003Cscript>\nimport Search from '@\u002Fcomponents\u002Fsearch\u002Fsearch.vue';\nexport default {\n    components: { Search },\n    props: {\n        list: {\n            type: Array,\n            default: () => []\n        }\n    },\n    data() {\n        return {\n            \u002F\u002F 左侧列表\n            leftList: [],\n            \u002F\u002F 右侧列表\n            rightList: [],\n            \u002F\u002F 组件数据备份\n            newList: [],\n            \u002F\u002F默认请求数,主要为了正常排序\n            interceptNumber: 10\n        };\n    },\n    created() {\n        this.touchOff(); \u002F\u002F 触发排列\n    },\n    mounted() {},\n    watch: {\n        list(newValue, oldValue) {\n            this.interceptNumber = newValue.length - oldValue.length;\n            this.touchOff();\n        }\n    },\n    computed: {},\n    methods: {\n        \u002F\u002F 触发重新排列\n        touchOff() {\n            this.newList = [...this.list.slice(-this.interceptNumber)];\n            if (this.newList.length !== 0) {\n                this.leftList.push(this.newList.shift()); \u002F\u002F触发排列\n            }\n        },\n        \u002F\u002F 计算排列\n        considerPush() {\n            this.$nextTick(() => {\n                if (this.newList.length == 0) return; \u002F\u002F没有数据了\n                let leftH = 0;\n                let rightH = 0; \u002F\u002F左右高度\n                let query = uni.createSelectorQuery().in(this);\n                query.selectAll('.waterfall_left').boundingClientRect();\n                query.selectAll('.waterfall_right').boundingClientRect();\n                query.exec(res => {\n                    leftH = res[0].length != 0 ? res[0][0].height : 0; \u002F\u002F防止查询不到做个处理\n                    rightH = res[1].length != 0 ? res[1][0].height : 0;\n                    if (leftH == rightH || leftH \u003C rightH) {\n                        \u002F\u002F 相等 || 左边小\n                        this.leftList.push(this.newList.shift());\n                    } else {\n                        \u002F\u002F 右边小\n                        this.rightList.push(this.newList.shift());\n                    }\n\n                    \u002F\u002F console.log('左右高度：', leftH, rightH, leftH == rightH || leftH \u003C rightH);\n                });\n            });\n        }\n    }\n};\n\u003C\u002Fscript>\n\n\u003Cstyle scoped lang=\\\"scss\\\">\n.waterfall {\n    display: flex;\n    align-items: flex-start;\n    justify-content: flex-start;\n    .waterfall_left {\n        flex: 1;\n    }\n\n    .waterfall_right {\n        flex: 1;\n    }\n}\n\u003C\u002Fstyle>\n\n```\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F7d4fa8d1d2775177b882a4656e3a5ed5.png",1817,"2022-11-22T07:54:41.000Z","2026-06-26T10:25:05.932Z",{"id":146,"name":147,"slug":148},{"id":29,"name":30,"avatar":20},[392],{"id":221,"name":222,"slug":223},{"id":394,"title":395,"slug":395,"content":396,"excerpt":395,"coverImage":397,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":398,"publishedAt":399,"createdAt":399,"updatedAt":400,"category":401,"author":402,"tags":403},"b2c46bf6-d971-4cce-b21b-052dbea8e8a2","v-html使用img点击实现放大效果","## 代码实现\n```js\n\u002F**\n * JS获取html代码中所有的图片地址\n * @param htmlstr\n * @returns arr 数组\n *\u002F\n\nexport function getimgsrc(htmlstr) {\n    let reg = \u002F\u003Cimg.+?src=('|\\\")?([^'\\\"]+)('|\\\")?(?:\\s+|>)\u002Fg;\n    let arr = [];\n    let tem = 0;\n    \u002F\u002Feslint-disable-next-line\n    while ((tem = reg.exec(htmlstr))) {\n        arr.push(tem[2]); \u002F\u002F eslint-disable-line\n    }\n\n    return arr;\n}\n\n```\n\n\n\n```vue\n\u003Ctemplate>\n    \u003Cdiv class=\\\"image-expansion\\\" :class=\\\"classArr\\\">\n        \u003Cdiv @click.stop=\\\"hanldeImage($event)\\\" v-html=\\\"formatHtmlData\\\">\u003C\u002Fdiv>\n\n        \u003Cel-image-viewer\n            v-if=\\\"imgPreviewUrl\\\"\n            :initial-index=\\\"subscript\\\"\n            :src=\\\"imgPreviewUrl\\\"\n            :on-close=\\\"closeViewer\\\"\n            :url-list=\\\"imgList\\\"\n        >\u003C\u002Fel-image-viewer>\n    \u003C\u002Fdiv>\n\u003C\u002Ftemplate>\n\n\u003Cscript>\nimport { getimgsrc } from '..\u002F..\u002Futils\u002Fgetimgsrc';\nimport ElImageViewer from 'element-ui\u002Fpackages\u002Fimage\u002Fsrc\u002Fimage-viewer';\nexport default {\n    components: {\n        ElImageViewer\n    },\n    props: {\n        htmlData: {\n            type: String,\n            default: () => {\n                return '';\n            }\n        },\n        classArr: {\n            type: Array,\n            default: () => {\n                return ['min'];\n            }\n        },\n\n        isArticle: {\n            type: Boolean,\n            default: () => {\n                return false;\n            }\n        }\n    },\n    data() {\n        return {\n            imgList: [],\n            formatHtmlData: '',\n            imgPreviewUrl: '',\n            subscript: 0\n        };\n    },\n    computed: {},\n\n    watch: {\n        \u002F\u002F监听数据，防止数据不更新\n        htmlData: {\n            handler(newName, oldName) {\n                \u002F\u002F判断是否为文章\n                if (this.isArticle) {\n                    newName ? (this.formatHtmlData = newName.replace(\u002F(\u003C([^>]+)>)\u002Fgi, '').replace(\u002F[\\\r\\\n]\u002Fg, '')) : '';\n                } else {\n                    \u002F\u002F剔除strong和p标签\n                    newName ? (this.formatHtmlData = newName.replace(\u002F(\u003C\\\u002F?strong.*?>)|(\u003C\\\u002F?p.*?>)\u002Fg, '')) : '';\n\n                    \u002F\u002F获取html全部图片，push成图片数组\n                    this.imgList = Object.values(getimgsrc(this.formatHtmlData));\n                    \u002F\u002F获取图片下标\n                    let subscript = this.imgList.indexOf(this.imgPreviewUrl);\n                    this.subscript = subscript > -1 ? subscript : 0;\n                }\n            },\n\n            immediate: true\n        }\n    },\n\n    mounted() {},\n\n    methods: {\n        \u002F\u002F监听点击事件\n        hanldeImage(event) {\n            if (event.target.nodeName === 'IMG' || event.target.nodeName === 'img') {\n                \u002F\u002F获取点击的图片url,decodeURIComponent转码一下，防禁url转码\n                this.imgPreviewUrl = decodeURIComponent(event.target.currentSrc);\n\n                \u002F\u002F获取图片下标\n                let subscript = this.imgList.indexOf(this.imgPreviewUrl);\n                this.subscript = subscript > -1 ? subscript : 0;\n\n                \u002F\u002F禁止遮罩层后面的内容滚动\n                document.documentElement.style.overflowY = 'hidden';\n            } else {\n                this.$emit('goDetail');\n            }\n        },\n\n        \u002F\u002F关闭弹框\n        closeViewer() {\n            this.imgPreviewUrl = '';\n            \u002F\u002F恢复遮罩层后面的内容滚动\n            document.documentElement.style.overflowY = 'auto';\n        }\n    }\n};\n\u003C\u002Fscript>\n\n\u003Cstyle lang=\\\"scss\\\" scoped>\n.image-expansion {\n}\n\n.min {\n    \u002Fdeep\u002F img {\n        cursor: pointer;\n        height: 28px;\n        padding: 0 10px 3px;\n    }\n}\n\n.max {\n    \u002Fdeep\u002F img {\n        cursor: pointer;\n    }\n}\n\n.class1 {\n    \u002Fdeep\u002F div {\n        font-size: 15px;\n        font-family: Microsoft YaHei;\n        font-weight: 400;\n        color: #888888;\n        line-height: 30px;\n    }\n}\n\u003C\u002Fstyle>\n\n\n```\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002Fc77c3fb113d1ab2f67e7afba1ca33b95.png",1571,"2023-01-10T07:22:29.000Z","2026-06-26T10:25:07.650Z",{"id":171,"name":172,"slug":173},{"id":29,"name":30,"avatar":20},[404],{"id":327,"name":328,"slug":328},{"id":48,"title":49,"slug":50,"content":51,"excerpt":49,"coverImage":52,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":53,"publishedAt":54,"createdAt":54,"updatedAt":55,"category":406,"author":407,"tags":408},{"id":43,"name":5,"slug":6},{"id":29,"name":30,"avatar":20},[409],{"id":4,"name":5,"slug":6},{"id":411,"title":412,"slug":413,"content":414,"excerpt":412,"coverImage":415,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":416,"publishedAt":417,"createdAt":417,"updatedAt":418,"category":419,"author":420,"tags":421},"1dcdd755-0e46-45a3-8998-9a213fd3fcd5","Vue3 导入导出Excel","vue3-导入导出excel","## 安装\n```shell\npnpm add -S XLSX\n```\n\n\n## 方法封装\n```js\nimport * as XLSX from 'xlsx';\n\n\u002F\u002F参数说明\n\u002F\u002Fconfiguration: {\n\u002F\u002F  data: [], \u002F\u002F 导出的数据\n\u002F\u002F  head: {}, \u002F\u002F 导出的数据对应的表头\n\u002F\u002F  name: '', \u002F\u002F 导出的文件名\n\u002F\u002F  label: '', \u002F\u002F 导出的表单名\n\u002F\u002F  widthArr: [], \u002F\u002F 导出的表单列宽\n\u002F\u002F}\n\n\u002F\u002F 导出excel\nexport const ExportXlsx = (configuration) => {\n  const { data, head, name, label, widthArr } = configuration;\n\n  const list = data.map((item) => {\n    const obj = {};\n    for (const k in item) {\n      if (head[k]) {\n        obj[head[k]] = item[k];\n      }\n    }\n    return obj;\n  });\n\n  \u002F\u002F 创建工作表\n  const xLSXData = XLSX.utils.json_to_sheet(list);\n  \u002F\u002F 创建工作簿\n  const wb = XLSX.utils.book_new();\n  \u002F\u002F 将工作表放入工作簿中\n  XLSX.utils.book_append_sheet(wb, xLSXData, label);\n  xLSXData['!cols'] = [];\n  \u002F\u002F 设置列宽\n  widthArr.forEach((item) => {\n    xLSXData['!cols'].push({ wpx: item });\n  });\n\n  \u002F\u002F 生成文件并下载\n  XLSX.writeFile(wb, `${name}.xlsx`);\n};\n\n\u002F\u002F 导入excel\nexport const ImportXlsx = (e) => {\n  const file = e.target.files[0];\n  const reader = new FileReader();\n  reader.readAsArrayBuffer(file);\n  reader.onload = (e) => {\n    const data = e.target.result;\n    const workbook = XLSX.read(data, { type: 'binary', cellDates: true });\n    const wsname = workbook.SheetNames[0];\n    const outdata = XLSX.utils.sheet_to_json(workbook.Sheets[wsname]);\n    console.log(outdata);\n  };\n};\n\n```\n","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F80231a326d3846b895a7d46c99e738ce.png",1334,"2023-03-14T06:18:59.000Z","2026-06-26T09:54:47.798Z",{"id":146,"name":147,"slug":148},{"id":29,"name":30,"avatar":20},[422],{"id":221,"name":222,"slug":223},{"id":424,"title":425,"slug":426,"content":427,"excerpt":425,"coverImage":428,"status":18,"isPinned":19,"pinnedAt":20,"viewCount":429,"publishedAt":430,"createdAt":430,"updatedAt":431,"category":432,"author":436,"tags":437},"80920598-a452-4357-bf53-842b200560e8","React18入门到精通教程","react18入门到精通教程","\n## JSX实现列表渲染\n> 使用`map()`方法遍历数组，必须添加`key`属性提高性能\n```jsx\nconst songs = [\n  { id: 1, name: \\\"helo1\\\" },\n  { id: 2, name: \\\"helo2\\\" },\n  { id: 3, name: \\\"helo3\\\" },\n];\n\nfunction App() {\n  return (\n    \u003Cdiv>\n      \u003Cul>\n        {songs.map((song) => (\n          \u002F\u002F 关键：添加唯一key标识符（避免使用索引）\n          \u003Cli key={song.id}>  \n            {song.id}-{song.name}\n          \u003C\u002Fli>\n        ))}\n      \u003C\u002Ful>\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n**最佳实践：**\n1. 使用`\u003Cul>`包裹列表项\n2. `key`应使用稳定唯一标识（如ID），避免数组索引\n3. 空列表处理：`{songs.length > 0 && ...}` 或 `{songs.map(...) || \u003CEmptyView\u002F>}`\n\n## JSX实现条件渲染\n### 简单逻辑\n```jsx\n\u002F\u002F 三元表达式\n{isLoggedIn ? \u003CDashboard \u002F> : \u003CLoginForm \u002F>}\n\n\u002F\u002F 逻辑短路\n{hasNotification && \u003CNotificationBadge count={5} \u002F>}\n\n\u002F\u002F 空值处理\n{userProfile?.avatar || \u003CDefaultAvatar \u002F>}\n```\n\n### 复杂逻辑\n```jsx\nconst renderContent = (type) => {\n  switch(type) {\n    case 'success': \n      return \u003CSuccessAlert \u002F>;\n    case 'error':\n      return \u003CErrorAlert \u002F>;\n    default:\n      return \u003CInfoAlert \u002F>;\n  }\n}\n\nfunction App() {\n  return (\n    \u003Cdiv className=\\\"container\\\">\n      {renderContent(status)}\n      \n      {\u002F* 另一种模式：立即执行函数 *\u002F}\n      {(() => {\n        if (isLoading) return \u003CSpinner \u002F>;\n        if (isEmpty) return \u003CEmptyState \u002F>;\n        return \u003CDataTable \u002F>;\n      })()}\n    \u003C\u002Fdiv>\n  )\n}\n```\n\n## JSX样式处理\n### 行内样式\n```jsx\n\u002F\u002F 直接对象\n\u003Cdiv style={{ \n  color: 'white', \n  backgroundColor: 'teal',\n  padding: '1rem'\n}}>\n\n\u002F\u002F 样式对象复用\nconst alertStyle = {\n  padding: '15px',\n  borderRadius: '4px',\n  margin: '10px 0'\n};\n\nfunction Alert({ type }) {\n  return (\n    \u003Cdiv style={{\n      ...alertStyle,  \u002F\u002F 扩展运算符合并样式\n      background: type === 'error' ? '#f8d7da' : '#d4edda'\n    }}>\n      {message}\n    \u003C\u002Fdiv>\n  )\n}\n```\n\n### 类名控制（推荐）\n```css\n\u002F* styles.module.css *\u002F\n.card {\n  border: 1px solid #ddd;\n  border-radius: 8px;\n  padding: 20px;\n  box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n}\n\n.highlight {\n  background-color: #ffffe0;\n}\n```\n\n```jsx\nimport styles from '.\u002Fstyles.module.css';\n\nfunction ProductCard({ featured }) {\n  return (\n    \u003Cdiv className={`${styles.card} ${featured ? styles.highlight : ''}`}>\n      {\u002F* 内容 *\u002F}\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n## React 18新特性\n### 并发模式（Concurrent Mode）\n```jsx\nimport { startTransition } from 'react';\n\n\u002F\u002F 非紧急状态更新\nfunction handleSearch(query) {\n  startTransition(() => {\n    setSearchQuery(query); \u002F\u002F 可中断的渲染\n  });\n}\n```\n\n### 自动批处理（Automatic Batching）\n```jsx\n\u002F\u002F React 17及之前：两次渲染\n\u002F\u002F React 18：自动批处理，一次渲染\nfunction handleClick() {\n  setCount(c => c + 1);\n  setFlag(f => !f);\n}\n```\n\n## Redux状态管理（现代写法）\n### 安装依赖\n```bash\nnpm install @reduxjs\u002Ftoolkit react-redux\n```\n\n### 创建Store\n```js\n\u002F\u002F store.js\nimport { configureStore, createSlice } from '@reduxjs\u002Ftoolkit';\n\nconst counterSlice = createSlice({\n  name: 'counter',\n  initialState: { value: 0 },\n  reducers: {\n    increment: state => { state.value += 1 },\n    decrement: state => { state.value -= 1 },\n    incrementByAmount: (state, action) => {\n      state.value += action.payload\n    }\n  }\n});\n\n\u002F\u002F 异步操作示例\nexport const fetchUserData = () => async (dispatch) => {\n  const response = await fetch('\u002Fapi\u002Fuser');\n  dispatch(setUser(await response.json()));\n};\n\nexport const store = configureStore({\n  reducer: {\n    counter: counterSlice.reducer,\n    \u002F\u002F 其他reducer...\n  }\n});\n\nexport const { increment, decrement } = counterSlice.actions;\n```\n\n### 组件集成\n```jsx\n\u002F\u002F index.js\nimport { Provider } from 'react-redux';\nimport { store } from '.\u002Fstore';\n\nroot.render(\n  \u003CProvider store={store}>\n    \u003CApp \u002F>\n  \u003C\u002FProvider>\n);\n\n\u002F\u002F Counter.js\nimport { useSelector, useDispatch } from 'react-redux';\nimport { increment, decrement } from '.\u002Fstore';\n\nfunction Counter() {\n  const count = useSelector(state => state.counter.value);\n  const dispatch = useDispatch();\n\n  return (\n    \u003Cdiv>\n      \u003Cbutton onClick={() => dispatch(decrement())}>-\u003C\u002Fbutton>\n      \u003Cspan>{count}\u003C\u002Fspan>\n      \u003Cbutton onClick={() => dispatch(increment())}>+\u003C\u002Fbutton>\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n## 最佳实践总结\n1. **组件设计**：遵循单一职责原则，拆分智能组件（容器组件）和展示组件\n2. **状态管理**：\n   - 局部状态用`useState`\u002F`useReducer`\n   - 全局共享状态用Redux\n   - 避免过度使用状态提升\n3. **性能优化**：\n   - 使用`React.memo`记忆组件\n   - 使用`useCallback`\u002F`useMemo`避免不必要的重渲染\n   - 虚拟化长列表（react-window）\n4. **Hooks规范**：\n   - 避免在循环\u002F条件中使用Hook\n   - 自定义Hook以`use`前缀命名\n5. **TypeScript集成**：\n   ```tsx\n   interface UserCardProps {\n     name: string;\n     age: number;\n     onSelect: (id: string) => void;\n   }\n   \n   const UserCard: React.FC\u003CUserCardProps> = ({ name, age }) => (\n     \u003Cdiv>{name} ({age})\u003C\u002Fdiv>\n   )\n   ```\n\n下面为您完善教程，增加React路由和生命周期相关内容：\n\n## React路由管理（React Router v6）\n\n### 安装与基础配置\n```bash\nnpm install react-router-dom@6\n```\n\n### 路由基础结构\n```jsx\n\u002F\u002F index.js\nimport { BrowserRouter } from 'react-router-dom';\n\nconst root = ReactDOM.createRoot(document.getElementById('root'));\nroot.render(\n  \u003CBrowserRouter>\n    \u003CApp \u002F>\n  \u003C\u002FBrowserRouter>\n);\n\n\u002F\u002F App.js\nimport { Routes, Route, Link } from 'react-router-dom';\n\nfunction App() {\n  return (\n    \u003Cdiv>\n      \u003Cnav>\n        \u003CLink to=\\\"\u002F\\\">首页\u003C\u002FLink>\n        \u003CLink to=\\\"\u002Fabout\\\">关于\u003C\u002FLink>\n        \u003CLink to=\\\"\u002Fusers\\\">用户列表\u003C\u002FLink>\n      \u003C\u002Fnav>\n      \n      \u003CRoutes>\n        \u003CRoute path=\\\"\u002F\\\" element={\u003CHome \u002F>} \u002F>\n        \u003CRoute path=\\\"\u002Fabout\\\" element={\u003CAbout \u002F>} \u002F>\n        \u003CRoute path=\\\"\u002Fusers\\\" element={\u003CUserList \u002F>} \u002F>\n        \u003CRoute path=\\\"\u002Fusers\u002F:id\\\" element={\u003CUserDetail \u002F>} \u002F>\n        \u003CRoute path=\\\"*\\\" element={\u003CNotFound \u002F>} \u002F>\n      \u003C\u002FRoutes>\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n### 嵌套路由\n```jsx\n\u002F\u002F Dashboard.js\nimport { Outlet } from 'react-router-dom';\n\nfunction Dashboard() {\n  return (\n    \u003Cdiv>\n      \u003Ch2>仪表盘\u003C\u002Fh2>\n      \u003COutlet \u002F> {\u002F* 子路由渲染位置 *\u002F}\n    \u003C\u002Fdiv>\n  );\n}\n\n\u002F\u002F 路由配置\n\u003CRoutes>\n  \u003CRoute path=\\\"\u002Fdashboard\\\" element={\u003CDashboard \u002F>}>\n    \u003CRoute index element={\u003CDashboardHome \u002F>} \u002F>\n    \u003CRoute path=\\\"settings\\\" element={\u003CDashboardSettings \u002F>} \u002F>\n    \u003CRoute path=\\\"analytics\\\" element={\u003CDashboardAnalytics \u002F>} \u002F>\n  \u003C\u002FRoute>\n\u003C\u002FRoutes>\n```\n\n### 编程式导航\n```jsx\nimport { useNavigate, useParams, useLocation } from 'react-router-dom';\n\nfunction UserCard({ user }) {\n  const navigate = useNavigate();\n  \n  return (\n    \u003Cdiv onClick={() => navigate(`\u002Fusers\u002F${user.id}`)}>\n      {user.name}\n    \u003C\u002Fdiv>\n  );\n}\n\nfunction UserDetail() {\n  const { id } = useParams(); \u002F\u002F 获取URL参数\n  const location = useLocation(); \u002F\u002F 获取位置对象\n  \n  return (\n    \u003Cdiv>\n      \u003Ch2>用户ID: {id}\u003C\u002Fh2>\n      \u003Cp>当前路径: {location.pathname}\u003C\u002Fp>\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n### 路由守卫（认证保护）\n```jsx\nimport { Navigate } from 'react-router-dom';\n\nfunction ProtectedRoute({ children }) {\n  const { isAuthenticated } = useAuth();\n  \n  if (!isAuthenticated) {\n    return \u003CNavigate to=\\\"\u002Flogin\\\" replace \u002F>;\n  }\n  \n  return children;\n}\n\n\u002F\u002F 使用\n\u003CRoute \n  path=\\\"\u002Fdashboard\\\" \n  element={\n    \u003CProtectedRoute>\n      \u003CDashboard \u002F>\n    \u003C\u002FProtectedRoute>\n  } \n\u002F>\n```\n\n## React生命周期\n\n### 类组件生命周期方法\n\n```jsx\nclass LifecycleDemo extends React.Component {\n  \u002F\u002F 1. 初始化阶段\n  constructor(props) {\n    super(props);\n    this.state = { count: 0 };\n    console.log('Constructor');\n  }\n\n  \u002F\u002F 2. 挂载阶段\n  componentDidMount() {\n    console.log('Component did mount');\n    \u002F\u002F 适合进行API调用、事件订阅\n    this.timer = setInterval(() => {\n      this.setState(prev => ({ count: prev.count + 1 }));\n    }, 1000);\n  }\n\n  \u002F\u002F 3. 更新阶段\n  shouldComponentUpdate(nextProps, nextState) {\n    console.log('Should component update?');\n    return nextState.count !== this.state.count;\n  }\n\n  componentDidUpdate(prevProps, prevState) {\n    console.log('Component did update');\n  }\n\n  \u002F\u002F 4. 卸载阶段\n  componentWillUnmount() {\n    console.log('Component will unmount');\n    \u002F\u002F 清理操作\n    clearInterval(this.timer);\n  }\n\n  render() {\n    console.log('Render');\n    return \u003Cdiv>Count: {this.state.count}\u003C\u002Fdiv>;\n  }\n}\n```\n\n### 函数组件生命周期（Hooks实现）\n\n```jsx\nimport { useState, useEffect } from 'react';\n\nfunction FunctionLifecycle() {\n  const [count, setCount] = useState(0);\n  const [data, setData] = useState(null);\n\n  \u002F\u002F 相当于componentDidMount + componentDidUpdate\n  useEffect(() => {\n    console.log('每次渲染后执行');\n  });\n\n  \u002F\u002F 相当于componentDidMount\n  useEffect(() => {\n    console.log('组件挂载后执行');\n    \n    \u002F\u002F 数据获取\n    fetch('\u002Fapi\u002Fdata')\n      .then(res => res.json())\n      .then(setData);\n    \n    \u002F\u002F 相当于componentWillUnmount\n    return () => {\n      console.log('组件卸载前执行');\n    };\n  }, []); \u002F\u002F 空依赖数组\n\n  \u002F\u002F 依赖变化时执行\n  useEffect(() => {\n    console.log('count变化时执行:', count);\n    \n    document.title = `Count: ${count}`;\n    \n    return () => {\n      console.log('清理count效果');\n    };\n  }, [count]); \u002F\u002F count依赖\n\n  return (\n    \u003Cdiv>\n      \u003Cp>Count: {count}\u003C\u002Fp>\n      \u003Cbutton onClick={() => setCount(c => c + 1)}>增加\u003C\u002Fbutton>\n      {data && \u003Cpre>{JSON.stringify(data, null, 2)}\u003C\u002Fpre>}\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n### 生命周期阶段对比\n\n| 阶段 | 类组件方法 | 函数组件Hook |\n|------|------------|--------------|\n| **挂载** | constructor | useState初始化 |\n|       | render      | 函数体执行    |\n|       | componentDidMount | useEffect(() => {}, []) |\n| **更新** | shouldComponentUpdate | React.memo, useMemo |\n|       | render      | 函数体执行    |\n|       | componentDidUpdate | useEffect(() => {}) |\n| **卸载** | componentWillUnmount | useEffect返回函数 |\n| **错误处理** | componentDidCatch | 暂无直接等效，需错误边界组件 |\n\n### 现代React开发建议\n\n1. **优先使用函数组件+Hooks**：\n   - 90%的场景可替代类组件\n   - 更简洁的代码结构\n   - 更好的逻辑复用\n\n2. **关键生命周期替代**：\n   - `componentDidMount` → `useEffect(() => {}, [])`\n   - `componentDidUpdate` → `useEffect(() => {})` 或带依赖的 `useEffect`\n   - `componentWillUnmount` → `useEffect(() => { return cleanup }, [])`\n   - `shouldComponentUpdate` → `React.memo` 或 `useMemo`\n\n3. **数据获取最佳实践**：\n```jsx\nuseEffect(() => {\n  let isMounted = true;\n  \n  const fetchData = async () => {\n    try {\n      const result = await api.getData();\n      if (isMounted) setData(result);\n    } catch (error) {\n      if (isMounted) setError(error);\n    }\n  };\n  \n  fetchData();\n  \n  return () => {\n    isMounted = false; \u002F\u002F 避免组件卸载后设置状态\n  };\n}, []);\n```\n\n## 路由与生命周期整合示例\n\n```jsx\nfunction UserProfile() {\n  const { id } = useParams();\n  const [user, setUser] = useState(null);\n  const [loading, setLoading] = useState(true);\n\n  useEffect(() => {\n    let isActive = true;\n    \n    const fetchUser = async () => {\n      try {\n        setLoading(true);\n        const data = await fetchUserById(id);\n        if (isActive) {\n          setUser(data);\n          setLoading(false);\n        }\n      } catch (error) {\n        if (isActive) {\n          setError(error.message);\n          setLoading(false);\n        }\n      }\n    };\n    \n    fetchUser();\n    \n    return () => {\n      isActive = false; \u002F\u002F 清理效果\n    };\n  }, [id]); \u002F\u002F id变化时重新获取\n\n  if (loading) return \u003CSpinner \u002F>;\n  \n  return (\n    \u003Cdiv>\n      \u003Ch2>{user.name}\u003C\u002Fh2>\n      \u003Cp>Email: {user.email}\u003C\u002Fp>\n    \u003C\u002Fdiv>\n  );\n}\n```\n\n## 完整项目结构建议\n\n```\nsrc\u002F\n├── components\u002F      # 通用UI组件\n├── pages\u002F           # 页面组件\n├── layouts\u002F         # 布局组件\n├── hooks\u002F           # 自定义Hooks\n├── store\u002F           # Redux状态\n│   ├── slices\u002F\n│   └── store.js\n├── services\u002F        # API服务\n├── routers\u002F         # 路由配置\n├── utils\u002F           # 工具函数\n├── assets\u002F          # 静态资源\n└── App.js           # 主应用组件\n```\n\n这些新增内容涵盖了React路由的现代用法（v6版本）以及React生命周期的详细解释，包括类组件和函数组件的实现方式对比。同时还提供了路由与生命周期整合的实际示例，帮助开发者理解如何在真实项目中应用这些概念。","https:\u002F\u002Fcdn.xiaolong0418.com\u002Fmyblog\u002Fimages\u002F46e205aa1bd33d1bb7201019fc2fdf43.png",1147,"2023-02-21T02:01:52.000Z","2026-06-26T10:25:15.418Z",{"id":433,"name":434,"slug":435},"f1701085-b8c1-413a-8750-58e7a0a33832","React","react",{"id":29,"name":30,"avatar":20},[438],{"id":265,"name":266,"slug":267}]