{"id":43449,"date":"2025-06-12T15:28:28","date_gmt":"2025-06-12T07:28:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/43449.html"},"modified":"2025-06-12T15:28:28","modified_gmt":"2025-06-12T07:28:28","slug":"%e5%89%8d%e7%ab%af%e6%a1%86%e6%9e%b6vue3%e7%9a%84%e5%8f%98%e5%8c%96%e4%b9%8b%e5%a4%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/43449.html","title":{"rendered":"\u524d\u7aef\u6846\u67b6vue3\u7684\u53d8\u5316\u4e4b\u5904"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u5728\u901a\u8bfb\u4e86vue\u7684\u5b98\u7f51\u6587\u6863\u540e，\u6211\u8bb0\u5f55\u4e0b\u4e86\u5982\u4e0b\u8fd9\u4e9b\u76f8\u5bf9\u4e8e2.x\u7684\u53d8\u5316\u4e4b\u5904\u3002<\/p>\n

1.\u521b\u5efa\u5e94\u7528\u5b9e\u4f8b\u7684\u53d8\u5316<\/h2>\n

\u4e4b\u524d\u4e00\u822c\u662f\u8fd9\u6837：<\/p>\n

let<\/span> app =<\/span> new<\/span> Vue<\/span>(<\/span>{<\/span>
\n\/\/ …\u4e00\u4e9b\u9009\u9879<\/span>
\ntemplate<\/span>:<\/span> ''<\/span>,<\/span>\/\/ \u5b57\u7b26\u4e32\u6a21\u677f<\/span>
\nrender<\/span>:<\/span> h<\/span> =><\/span> h<\/span>(<\/span>App)<\/span>\/\/ \u5355\u6587\u4ef6\u60c5\u51b5\u4e0b<\/span>
\n}<\/span>)<\/span>
\nlet<\/span> vm =<\/span> app.<\/span>$mount<\/span>(<\/span>'#app'<\/span>)<\/span>
\napp ===<\/span> vm\/\/ true<\/span><\/p>\n

\u800c\u73b0\u5728\u53d8\u6210\u8fd9\u6837：<\/p>\n

import<\/span> {<\/span> createApp }<\/span> from<\/span> 'vue'<\/span>
\nimport<\/span> App from<\/span> '.\/App.vue'<\/span>
\nlet<\/span> app =<\/span> createApp<\/span>(<\/span>{<\/span>
\n \/\/ …\u7ec4\u4ef6\u9009\u9879<\/span>
\n}<\/span>)<\/span>
\nlet<\/span> app =<\/span> createApp<\/span>(<\/span>App)<\/span>\/\/ \u5355\u6587\u4ef6\u60c5\u51b5\u4e0b<\/span>
\nlet<\/span> vm =<\/span> app.<\/span>mount<\/span>(<\/span>'#app'<\/span>)<\/span>
\napp ===<\/span> vm \/\/ false<\/span><\/p>\n

\u6539\u6210\u8fd9\u6837\u7684\u6700\u4e3b\u8981\u539f\u56e0\u662f\u4e3a\u4e86\u907f\u514d\u5bf9Vue\u7684\u5168\u5c40\u914d\u7f6e\u4f1a\u5f71\u54cd\u6bcf\u4e2a\u521b\u5efa\u7684\u5b9e\u4f8b\u3002<\/p>\n

2.data\u9009\u9879\u53d8\u5316<\/h2>\n

\u4e4b\u524d\u5728\u975e\u7ec4\u4ef6\u7684\u60c5\u51b5\u4e0b\u521b\u5efa\u5b9e\u4f8b\u53ef\u4ee5\u4f7f\u7528\u5bf9\u8c61，\u4f46\u662f\u73b0\u5728\u6240\u6709\u60c5\u51b5\u4e0b\u90fd\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u8fd4\u56de\u5bf9\u8c61\u7684\u51fd\u6570\u3002<\/p>\n

3.\u751f\u547d\u5468\u671f\u53d8\u5316<\/h2>\n

beforeDestroy=>beforeUnmount，destroyed=>unmounted，\u53e6\u5916\u65b0\u589e\u4e86\u4e24\u4e2a\u751f\u547d\u5468\u671frenderTracked\u548crenderTriggered，\u7528\u6765\u8ddf\u8e2a\u865a\u62dfDOM\u91cd\u65b0\u6e32\u67d3\u3002<\/p>\n

4.\u4e8b\u4ef6\u76d1\u542c\u652f\u6301\u591a\u4e2a\u5904\u7406\u51fd\u6570<\/h2>\n

\u57283.0\u4e2dv-on\u6307\u4ee4\u53ef\u4ee5\u7ed1\u5b9a\u591a\u4e2a\u5904\u7406\u51fd\u6570：<\/p>\n

<button @click="one(),two(),three($event)"><\/button><\/p>\n

export<\/span> default<\/span> {<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n one<\/span>(<\/span>)<\/span>{<\/span>}<\/span>,<\/span>
\n two<\/span>(<\/span>)<\/span>{<\/span>}<\/span>,<\/span>
\n three<\/span>(<\/span>)<\/span>{<\/span>}<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u7ed1\u5b9a\u591a\u4e2a\u51fd\u6570\u65f6\u5fc5\u987b\u4f7f\u7528\u5185\u8054\u51fd\u6570\u8c03\u7528\u65b9\u5f0f，\u5373\u4e0d\u80fd\u53ea\u5199\u4e00\u4e2a\u51fd\u6570\u540d\u3002<\/p>\n

5.\u5b9e\u4f8b\u591a\u4e86\u4e00\u4e2a\u6570\u636e\u9009\u9879：emits<\/h2>\n

\u663e\u5f0f\u58f0\u660e\u8be5\u7ec4\u4ef6\u80fd\u89e6\u53d1\u7684\u81ea\u5b9a\u4e49\u4e8b\u4ef6，\u5c31\u50cfprops\u5c5e\u6027\u4e00\u6837，\u53ef\u4ee5\u662f\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u6570\u7ec4，\u4e5f\u53ef\u4ee5\u662f\u5bf9\u8c61，\u540c\u6837\u7684，\u5bf9\u8c61\u7c7b\u578b\u7684\u8bdd\u53ef\u4ee5\u7528\u6765\u5b9a\u4e49\u6821\u9a8c，\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n emits<\/span>:<\/span> [<\/span>'change'<\/span>,<\/span> 'select'<\/span>]<\/span>,<\/span>\/\/ \u6570\u7ec4\u7c7b\u578b<\/span>
\n emits<\/span>:<\/span> {<\/span>\/\/ \u5bf9\u8c61\u7c7b\u578b<\/span>
\n change<\/span>:<\/span> null<\/span>,<\/span>\/\/ \u6ca1\u6709\u9a8c\u8bc1\u51fd\u6570<\/span>
\n select<\/span>:<\/span> (<\/span>arg<\/span>)<\/span> =><\/span> {<\/span>\/\/ \u63a5\u6536this.$emit('select', ..args)\u7684args\u53c2\u6570<\/span>
\n return<\/span> true<\/span>\/\/ \u8fd4\u56detrue\u6216false\u4ee3\u8868\u4e8b\u4ef6\u53c2\u6570\u662f\u5426\u6709\u6548，\u6821\u9a8c\u5931\u8d25\u4e8b\u4ef6\u8fd8\u662f\u80fd\u6b63\u5e38\u89e6\u53d1，\u4f46\u662f\u63a7\u5236\u53f0\u4f1a\u5f39\u51fa\u4e00\u884c\u8b66\u544a\u4fe1\u606f<\/span>
\n }<\/span>
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'change'<\/span>)<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'select'<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u8be5\u58f0\u660e\u662f\u53ef\u9009\u7684\u3002<\/p>\n

6.\u65b0\u589e\u4e86v-is\u6307\u4ee4<\/h2>\n

\u8fd9\u4e2a\u6307\u4ee4\u7528\u6765\u627f\u62c52.x\u7248\u672c\u91cc\u7684\u7279\u6b8aattributeis\u7684\u90e8\u5206\u529f\u80fd\u3002<\/p>\n

\u57282.x\u91ccis\u53ef\u7528\u5728\u4e24\u4e2a\u573a\u666f\u4e0b，\u4e00\u662f\u7528\u4e8e\u52a8\u6001\u7ec4\u4ef6component\u6765\u5207\u6362\u8981\u6e32\u67d3\u7684\u7ec4\u4ef6，\u4e8c\u662f\u7528\u4e8e\u5728\u4f7f\u7528DOM\u6a21\u677f\u65f6\u7684\u4e00\u4e9bHTML\u5143\u7d20\u7684\u9650\u5236，\u6bd4\u5982ul\u5143\u7d20\u91cc\u53ea\u80fd\u51fa\u73b0li\u5143\u7d20，\u8fd9\u6837\u5f53ul\u91cc\u4f7f\u7528\u81ea\u5b9a\u4e49\u7ec4\u4ef6\u65f6\u6d4f\u89c8\u5668\u4f1a\u8ba4\u4e3a\u662f\u65e0\u6548\u5185\u5bb9，\u6b64\u65f6\u53ef\u4ee5\u4f7f\u7528is\u5c5e\u6027：<\/p>\n

<<\/span>ul<\/span>><\/span><\/span>
\n <!–<my-component><\/my-component> x\u8fd9\u6837\u4e0d\u884c–><\/span>
\n <<\/span>li<\/span> is<\/span>=<\/span>"<\/span>my-component"<\/span><\/span>><\/span><\/span><\/<\/span>li<\/span>><\/span><\/span>
\n<\/<\/span>ul<\/span>><\/span><\/span><\/p>\n

\u800c\u57283.0\u7248\u672cis\u53ea\u80fd\u7528\u5728component\u4e0a，\u4e0a\u8ff0\u529f\u80fd\u9700\u8981\u4f7f\u7528v-is\u6765\u4ee3\u66ff：<\/p>\n

<<\/span>ul<\/span>><\/span><\/span>
\n <<\/span>li<\/span> v-is<\/span>=<\/span>"<\/span>'<\/span>my-component'"<\/span><\/span>><\/span><\/span><\/<\/span>li<\/span>><\/span><\/span>
\n<\/<\/span>ul<\/span>><\/span><\/span><\/p>\n

\u6ce8\u610f\u4e0a\u8ff0\u7684\u5355\u5f15\u53f7\u662f\u5fc5\u987b\u7684\u3002<\/p>\n

7.\u672a\u58f0\u660e\u7684emits<\/h2>\n

\u56e0\u4e3a\u65b0\u589e\u4e86\u7c7b\u4f3cprops\u7684\u9009\u9879emits，\u5982\u679c\u67d0\u4e9b\u4f20\u9012\u7ed9\u7ec4\u4ef6\u7684\u5c5e\u6027\u5e76\u6ca1\u6709\u5728props\u58f0\u660e，\u90a3\u4e48\u53ef\u4ee5\u901a\u8fc7$attrs\u5c5e\u6027\u6765\u8bbf\u95ee，\u4e8b\u4ef6\u76d1\u542c\u5668\u4e5f\u4e00\u6837：<\/p>\n

<!–\u7236\u7ec4\u4ef6–><\/span>
\n<<\/span>sub-component<\/span> @change<\/span>=<\/span>"<\/span>change"<\/span><\/span> @select<\/span>=<\/span>"<\/span>select"<\/span><\/span>><\/span><\/span><\/<\/span>sub-component<\/span>><\/span><\/span><\/p>\n

\/\/ \u5b50\u7ec4\u4ef6<\/span>
\nexport<\/span> default<\/span> {<\/span>
\n emits<\/span>:<\/span> [<\/span>'change'<\/span>]<\/span>,<\/span>
\n created<\/span>(<\/span>)<\/span>{<\/span>
\n console.<\/span>log<\/span>(<\/span>this<\/span>.<\/span>$attrs)<\/span>\/\/ { onSelect: () => {} }<\/span>
\n }<\/span>,<\/span>
\n}<\/span><\/p>\n

\u53e6\u5916，\u57282.x\u4e2d\u8fd9\u4e9b\u672a\u58f0\u660e\u7684props\u6216emits\u4f1a\u76f4\u63a5\u7ee7\u627f\u5230\u8be5\u7ec4\u4ef6\u7684\u6839\u8282\u70b9\u4e0a，\u6bd4\u5982：<\/p>\n

<!–\u7236\u7ec4\u4ef6–><\/span>
\n<<\/span>sub-component<\/span> class<\/span>=<\/span>"<\/span>warn"<\/span><\/span>><\/span><\/span><\/<\/span>sub-component<\/span>><\/span><\/span><\/p>\n

<!–\u5b50\u7ec4\u4ef6–><\/span>
\n<<\/span>div<\/span> class<\/span>=<\/span>"<\/span>info"<\/span><\/span>><\/span><\/span><\/<\/span>div<\/span>><\/span><\/span><\/p>\n

<!–\u5b9e\u9645\u6e32\u67d3\u7ed3\u679c–><\/span>
\n<<\/span>div<\/span> class<\/span>=<\/span>"<\/span>info warn"<\/span><\/span>><\/span><\/span><\/<\/span>div<\/span>><\/span><\/span><\/p>\n

\u4f46\u57283.x\u4e2d\u7ec4\u4ef6\u652f\u6301\u591a\u4e2a\u6839\u8282\u70b9，\u5f53\u51fa\u73b0\u591a\u4e2a\u6839\u8282\u70b9\u65f6，\u5c5e\u6027\u5c06\u4e0d\u4f1a\u4e3b\u52a8\u7ee7\u627f，\u9700\u8981\u624b\u52a8\u7ed9\u9700\u8981\u7ee7\u627f\u5c5e\u6027\u7684\u7ec4\u4ef6\u8fdb\u884c\u7ed1\u5b9a，\u5982\u679c\u4e00\u4e2a\u90fd\u6ca1\u7ed1\u5b9a\u7684\u8bddvue\u4f1a\u7ed9\u51fa\u8b66\u544a：<\/p>\n

<template>
\n<my-momponent class="bar" @change="change"><\/my-component>
\n<\/template><\/p>\n

<template>
\n<div v-bind="$attrs"><\/div>
\n<div><\/div>
\n<\/template><\/p>\n

8.v-model\u7684\u53d8\u5316<\/h2>\n

\u57282.x\u4e2d\u7ed9\u4e00\u4e2a\u7ec4\u4ef6\u81ea\u5b9a\u4e49v-model\u4e00\u822c\u662f\u8fd9\u6837\u7684：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n model<\/span>:<\/span> {<\/span>\/\/ v-model\u9ed8\u8ba4\u662f\u5229\u7528\u540d\u4e3avalue\u7684prop\u53cainput\u4e8b\u4ef6，\u53ef\u4f7f\u7528model\u9009\u9879\u6765\u4fee\u6539<\/span>
\n prop<\/span>:<\/span> 'checked'<\/span>,<\/span>
\n event<\/span>:<\/span> 'change'<\/span>
\n }<\/span>,<\/span>
\n props<\/span>:<\/span> {<\/span>
\n checked<\/span>:<\/span> Boolean
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'change'<\/span>,<\/span> true<\/span>)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span>
\n\/*
\n<my-component v-model="checked"><\/my-component>
\n*\/<\/span><\/p>\n

\u57283.x\u4e2dv-model\u6307\u4ee4\u591a\u4e86\u4e00\u4e2a\u53c2\u6570，\u6bd4\u5982：v-model:value="value"，\u6240\u4ee5\u5c31\u4e0d\u9700\u8981\u4f7f\u7528model\u9009\u9879\u4e86，vue\u4f1a\u76f4\u63a5\u5229\u7528value\u5c5e\u6027\u53ca\u4e8b\u4ef6\u540dupdate:value：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n props<\/span>:<\/span> {<\/span>
\n checked<\/span>:<\/span> Boolean
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:checked'<\/span>,<\/span> true<\/span>)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span>
\n\/*
\n<my-component v-model:checked="checked"><\/my-component>
\n*\/<\/span><\/p>\n

\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u7701\u7565value，\u8fd9\u6837\u4f1a\u9ed8\u8ba4\u7ed1\u5b9a\u5230\u540d\u4e3amodelValue\u7684prop\u4e0a：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n props<\/span>:<\/span> {<\/span>
\n modelValue<\/span>:<\/span> Boolean
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:modelValue'<\/span>,<\/span> true<\/span>)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span>
\n\/*
\n<my-component v-model="checked"><\/my-component>
\n*\/<\/span><\/p>\n

\u8fd9\u6837\u7684\u4e00\u4e2a\u597d\u5904\u662f\u53ef\u4ee5\u7ed1\u5b9a\u591a\u4e2av-model：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n props<\/span>:<\/span> {<\/span>
\n modelValue<\/span>:<\/span> Number,<\/span>
\n checked<\/span>:<\/span> Boolean,<\/span>
\n value<\/span>:<\/span> String
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:modelValue'<\/span>,<\/span> 1<\/span>)<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:checked'<\/span>,<\/span> true<\/span>)<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:value'<\/span>,<\/span> 'abc'<\/span>)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span>
\n\/*
\n<my-component v-model="count" v-model:checked="checked" v-model:value="value"><\/my-component>
\n*\/<\/span><\/p>\n

\u6700\u540e\u4e00\u70b9\u662f3.x\u652f\u6301\u81ea\u5b9a\u4e49v-model\u7684\u4fee\u9970\u7b26，\u5927\u81f4\u5c31\u662f\u4fee\u9970\u7b26\u4e5f\u80fd\u901a\u8fc7props\u83b7\u53d6\u5230，\u7136\u540e\u53ef\u4ee5\u6839\u636e\u4fee\u9970\u7b26\u5b58\u5728\u4e0e\u5426\u8fdb\u884c\u4e00\u4e9b\u5bf9\u5e94\u7684\u6570\u636e\u683c\u5f0f\u5316\u64cd\u4f5c：<\/p>\n

\/*
\n<my-component v-model.double="count" v-model:count2.double="count2"><\/my-component>
\n*\/<\/span><\/p>\n

export<\/span> default<\/span> {<\/span>
\n props<\/span>:<\/span> {<\/span>
\n modelValue<\/span>:<\/span> Number,<\/span>
\n count2<\/span>:<\/span> Number,<\/span>
\n modelModifiers<\/span>:<\/span> Object,<\/span>\/\/ \u6ca1\u6709\u53c2\u6570\u7684v-model\u7684\u4fee\u9970\u7b26\u6570\u636e，\u540d\u79f0\u4e3amodelModifiers，\u5bf9\u8c61\u683c\u5f0f：{double: true}，\u5982\u679c\u4fee\u9970\u7b26\u4e0d\u5b58\u5728\u4e3aundefined<\/span>
\n count2Modifiers<\/span>:<\/span> Object\/\/ \u5e26\u53c2\u6570\u7684v-model\u7684\u4fee\u9970\u7b26\u6570\u636e\u540d\u79f0\u4e3a：\u53c2\u6570+"Modifiers"，\u5bf9\u8c61\u683c\u5f0f：{double: true}，\u5982\u679c\u4fee\u9970\u7b26\u4e0d\u5b58\u5728\u4e3aundefined<\/span>
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n emit<\/span>(<\/span>)<\/span> {<\/span>
\n \/\/ \u5728\u8fd9\u91cc\u53ef\u4ee5\u6839\u636emodelModifiers\u548ccount2Modifiers\u7684\u503c\u6765\u5224\u65ad\u662f\u5426\u8981\u8fdb\u884c\u4e00\u4e9b\u6570\u636e\u64cd\u4f5c<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:modelValue'<\/span>,<\/span> xxx)<\/span>
\n this<\/span>.<\/span>$emit<\/span>(<\/span>'update:value'<\/span>,<\/span> xxx)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

9.\u54cd\u5e94\u5f0fprovide\/reject<\/h2>\n

provide\/reject\u9ed8\u8ba4\u662f\u6ca1\u6709\u54cd\u5e94\u6027\u7684，\u7236\u7ec4\u4ef6\u7684provide\u503c\u53d8\u5316\u4e86，\u5b50\u7ec4\u4ef6\u4f7f\u7528reject\u63a5\u6536\u7684\u503c\u4e0d\u4f1a\u76f8\u5e94\u66f4\u65b0，\u57282.0\u4e2d，\u60f3\u8981\u4f7f\u5b83\u53d8\u6210\u53ef\u54cd\u5e94\u6bd4\u8f83\u9ebb\u70e6，\u4e0b\u9762\u8fd9\u79cd\u65b9\u5f0f\u662f\u4e0d\u884c\u7684，\u7236\u7ec4\u4ef6\u7684count\u53d8\u5316\u4e86\u5b50\u7ec4\u4ef6\u7684count\u5e76\u4e0d\u4f1a\u53d8\u5316：<\/p>\n

<template>
\n<div>{{count}}<\/div>
\n<\/template>
\n<script>
\nexport default {
\n inject: ['count']
\n}
\n<\/script><\/p>\n

export<\/span> default<\/span> {<\/span>
\n provide<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span> this<\/span>.<\/span>count
\n }<\/span>
\n }<\/span>,<\/span>
\n data<\/span>:<\/span> {<\/span>
\n count<\/span>:<\/span> 0<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

vue2.x\u6587\u6863\u91cc\u6709\u4e2a\u63d0\u793a：<\/p>\n

\u63d0\u793a：provide \u548c inject \u7ed1\u5b9a\u5e76\u4e0d\u662f\u53ef\u54cd\u5e94\u7684\u3002\u8fd9\u662f\u523b\u610f\u4e3a\u4e4b\u7684\u3002\u7136\u800c，\u5982\u679c\u4f60\u4f20\u5165\u4e86\u4e00\u4e2a\u53ef\u76d1\u542c\u7684\u5bf9\u8c61，\u90a3\u4e48\u5176\u5bf9\u8c61\u7684 property \u8fd8\u662f\u53ef\u54cd\u5e94\u7684\u3002<\/p>\n

\u540e\u534a\u53e5\u6211\u7684\u7406\u89e3\u662f\u5982\u679cprovide\u8fd4\u56de\u7684\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\u662f\u4e00\u4e2a\u53ef\u54cd\u5e94\u5bf9\u8c61\u7684\u8bdd，\u90a3\u4e48\u662f\u53ef\u4ee5\u7684，\u6bd4\u5982：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n provide<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span> this<\/span>.<\/span>countObj
\n }<\/span>
\n }<\/span>,<\/span>
\n data<\/span>:<\/span> {<\/span>
\n countObj<\/span>:<\/span> {<\/span>
\n value<\/span>:<\/span> 0<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u8fd9\u6837\u7684\u8bdd\u4fee\u6539countObj.value\u7684\u503c，\u5b50\u7ec4\u4ef6\u4f1a\u76f8\u5e94\u7684\u66f4\u65b0，\u4f46\u662f\u5982\u679c\u60f3\u50cf\u4e0a\u9762\u90a3\u6837\u4f9d\u8d56count\u7684\u503c，\u5373\u4f7f\u4f60\u4f7f\u7528computed\u4e5f\u662f\u4e0d\u884c\u7684：<\/p>\n

export<\/span> default<\/span> {<\/span>
\n provide<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span> this<\/span>.<\/span>countObj
\n }<\/span>
\n }<\/span>,<\/span>
\n data<\/span>:<\/span> {<\/span>
\n count<\/span>:<\/span> 0<\/span>
\n }<\/span>,<\/span>
\n computed<\/span>:<\/span> {<\/span>
\n countObj<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n value<\/span>:<\/span> this<\/span>.<\/span>count
\n }<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u90a3\u4e48\u5c31\u53ea\u80fd\u4f7f\u7528watch\u548cVue.observable\u65b9\u6cd5\u6765\u914d\u5408\u5b9e\u73b0：<\/p>\n

let<\/span> countState =<\/span> Vue.<\/span>observable<\/span>(<\/span>{<\/span> value<\/span>:<\/span> 0<\/span> }<\/span>)<\/span>;<\/span><\/p>\n

export<\/span> default<\/span> {<\/span>
\n provide<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span> countState
\n }<\/span>;<\/span>
\n }<\/span>,<\/span>
\n data<\/span>:<\/span> {<\/span>
\n count<\/span>:<\/span> 0<\/span>
\n }<\/span>,<\/span>
\n watch<\/span>:<\/span> {<\/span>
\n count<\/span>(<\/span>newVal<\/span>)<\/span> {<\/span>
\n countState.<\/span>value =<\/span> newVal
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u4f46\u662f\u57283.x\u4e2d\u5c31\u6bd4\u8f83\u7b80\u5355\u4e86，\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u7ec4\u5408\u5f0fapi\u91cc\u7684computed\u65b9\u6cd5：<\/p>\n

import<\/span> {<\/span>computed}<\/span> from<\/span> 'vue'<\/span><\/p>\n

export<\/span> default<\/span> {<\/span>
\n provide<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span> computed<\/span>(<\/span>(<\/span>)<\/span> =><\/span> {<\/span>
\n return<\/span> this<\/span>.<\/span>count
\n }<\/span>)<\/span>
\n }<\/span>;<\/span>
\n }<\/span>,<\/span>
\n data<\/span>:<\/span> {<\/span>
\n count<\/span>:<\/span> 0<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u540e\u9762\u8fd9\u4e9b\u5728\u5b50\u7ec4\u4ef6\u91cc\u4f7f\u7528\u7684\u65f6\u5019\u90fd\u9700\u8981\u8bbf\u95eecount.value\u5c5e\u6027\u3002<\/p>\n

10.\u5f02\u6b65\u7ec4\u4ef6<\/h2>\n

\u57282.x\u4e2d，\u5f02\u6b65\u7ec4\u4ef6\u4e00\u822c\u4f7f\u7528\u5982\u4e0b\u65b9\u6cd5\u5b9a\u4e49：<\/p>\n

\/\/ \u5168\u5c40<\/span>
\nVue.<\/span>component<\/span>(<\/span>'async-component'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> import<\/span>(<\/span>'.\/my-async-component'<\/span>)<\/span>)<\/span>
\n\/\/ \u5c40\u90e8<\/span>
\n{<\/span>
\n components<\/span>:<\/span> {<\/span>
\n 'async-component'<\/span>:<\/span> (<\/span>)<\/span> =><\/span> import<\/span>(<\/span>'.\/my-async-component'<\/span>)<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u57283.x\u4e2d\u65b0\u589e\u4e86\u4e00\u4e2a\u51fd\u6570defineAsyncComponent\u6765\u505a\u8fd9\u4ef6\u4e8b\u60c5：<\/p>\n

import<\/span> {<\/span> defineAsyncComponent }<\/span> from<\/span> 'vue'<\/span>
\nconst<\/span> AsyncComp =<\/span> defineAsyncComponent<\/span>(<\/span>(<\/span>)<\/span> =><\/span>
\n import<\/span>(<\/span>'.\/components\/AsyncComponent.vue'<\/span>)<\/span>
\n)<\/span><\/p>\n

\/\/ \u5168\u5c40<\/span>
\napp.<\/span>component<\/span>(<\/span>'async-component'<\/span>,<\/span> AsyncComp)<\/span>
\n\/\/ \u7ec4\u4ef6\u5185<\/span>
\n{<\/span>
\n components<\/span>:<\/span> {<\/span>
\n'AsyncComponent'<\/span>:<\/span> AsyncComp
\n }<\/span>
\n}<\/span><\/p>\n

11.\u8fc7\u6e21class\u7684\u53d8\u5316<\/h2>\n

3.x\u548c2.x\u4e00\u6837，\u4ecd\u7136\u67096\u4e2aclass，\u610f\u4e49\u5b8c\u5168\u4e00\u6837，\u552f\u4e00\u7684\u53d8\u5316\u53ea\u6709v-enter->v-enter-from\u3001v-leave->v-leave-from\u4e24\u4e2a\u540d\u5b57\u4ee5\u53caenter-class->enter-from-class\u3001leave-class->leave-from-class\u4e24\u4e2a\u81ea\u5b9a\u4e49\u7c7b\u540d\u7684\u53d8\u5316\u3002<\/p>\n

12.\u81ea\u5b9a\u4e49\u6307\u4ee4\u53d8\u5316<\/h2>\n

\u57282.x\u4e2d\u63d0\u4f9b\u4e86bind\u3001inserted\u3001update\u3001componentUpdated\u3001unbind\u4e94\u4e2a\u6307\u4ee4，\u57283.x\u4e2d\u65b0\u589e\u4e86\u4e00\u4e2a，\u4e00\u5171\u6709\u516d\u4e2a：<\/p>\n

beforeMount（\u6307\u4ee4\u7b2c\u4e00\u6b21\u7ed1\u5b9a\u5230\u5143\u7d20\u5e76\u4e14\u8fd8\u672a\u6302\u8f7d\u5230\u7236\u7ec4\u4ef6\u4e0a\u8c03\u7528，\u5bf9\u5e94\u4e8ebind，\u7528\u6765\u8fdb\u884c\u4e00\u4e9b\u521d\u59cb\u5316\u64cd\u4f5c）<\/p>\n

mounted（\u7ed1\u5b9a\u5143\u7d20\u7684\u7236\u7ec4\u4ef6\u88ab\u6302\u8f7d\u65f6\u8c03\u7528，\u5bf9\u5e94inserted，\u4f46\u662finserted\u7684\u63cf\u8ff0\u91cc\u8bf4\u4ec5\u4fdd\u8bc1\u7236\u7ec4\u4ef6\u5b58\u5728\u4f46\u4e0d\u4e00\u5b9a\u88ab\u63d2\u5165\u5230\u6587\u6863\u4e2d，mounted\u7684\u63cf\u8ff0\u91cc\u6ca1\u6709\u8fd9\u53e5\u8bdd）<\/p>\n

beforeUpdate（\u5728\u5305\u542b\u8be5\u7ec4\u4ef6\u7684\u865a\u62df\u8282\u70b9\u88ab\u66f4\u65b0\u524d\u8c03\u7528，\u5bf9\u5e94update）<\/p>\n

updated（\u5728\u5305\u542b\u8be5\u7ec4\u4ef6\u7684\u865a\u62df\u8282\u70b9\u53ca\u5176\u6240\u6709\u5b50\u7ec4\u4ef6\u7684\u865a\u62df\u8282\u70b9\u90fd\u66f4\u65b0\u540e\u8c03\u7528，\u5bf9\u5e94componentUpdated）<\/p>\n

beforeUnmount（\u5728\u5378\u8f7d\u7ed1\u5b9a\u5143\u7d20\u7684\u7236\u7ec4\u4ef6\u524d\u8c03\u7528，\u4e3a\u65b0\u589e\u94a9\u5b50）<\/p>\n

unmounted（\u6307\u4ee4\u4e0e\u5143\u7d20\u89e3\u9664\u7ed1\u5b9a\u4e14\u7236\u7ec4\u4ef6\u5df2\u7ecf\u5378\u8f7d\u65f6\u8c03\u7528，\u5bf9\u5e94unbind）<\/p>\n

\u603b\u7684\u6765\u8bf4\u6539\u540d\u540e\u7684\u81ea\u5b9a\u4e49\u94a9\u5b50\u548cvue\u672c\u8eab\u7684\u751f\u547d\u5468\u671f\u94a9\u5b50\u8d8b\u4e8e\u4e00\u81f4\u3002<\/p>\n

13.\u65b0\u589eTeleport<\/h2>\n

\u57282.x\u4e2d\u6709\u4e00\u4e2a\u5e38\u89c1\u7684\u75db\u70b9：<\/p>\n

<<\/span>div<\/span>><\/span><\/span>
\n <<\/span>Dialog<\/span>><\/span><\/span><\/<\/span>Dialog<\/span>><\/span><\/span>
\n <<\/span>Loading<\/span>><\/span><\/span><\/<\/span>Loading<\/span>><\/span><\/span>
\n<\/<\/span>div<\/span>><\/span><\/span><\/p>\n

\u5728\u4e0a\u8ff0\u7ec4\u4ef6\u91cc\u5305\u542b\u4e86\u4e24\u4e2a\u5b50\u7ec4\u4ef6，\u50cf\u8fd9\u79cd\u5f39\u7a97\u6216loading\u7ec4\u4ef6\u4e00\u822c\u90fd\u662f\u5e0c\u671b\u5b83\u4eec\u7684DOM\u8282\u70b9\u76f4\u63a5\u6302\u5728body\u5143\u7d20\u4e0b，\u8fd9\u6837\u5728\u6837\u5f0f\u5c24\u5176\u662f\u5c42\u7ea7\u4e0a\u6bd4\u8f83\u597d\u63a7\u5236，\u4f46\u662f\u5b9e\u9645\u6e32\u67d3\u51fa\u6765\u662f\u5728\u8fd9\u4e2adiv\u8282\u70b9\u4e0b\u7684，\u90a3\u4e48\u5c31\u53ea\u80fd\u628a\u8fd9\u4e24\u4e2a\u7ec4\u4ef6\u79fb\u5230body\u4e0b，\u4f46\u662f\u903b\u8f91\u4e0a\u8fd9\u4e24\u4e2a\u7ec4\u4ef6\u53c8\u662f\u5c5e\u4e8e\u8be5\u7ec4\u4ef6，\u6240\u4ee5\u5c31\u6bd4\u8f83\u4e0d\u723d\u3002<\/p>\n

\u57283.x\u4e2d\u65b0\u589e\u4e86teleport\u7ec4\u4ef6\u53ef\u4ee5\u7528\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898：<\/p>\n

<<\/span>div<\/span>><\/span><\/span>
\n <<\/span>teleport<\/span> to<\/span>=<\/span>"<\/span>body"<\/span><\/span>><\/span><\/span>
\n <<\/span>Dialog<\/span>><\/span><\/span><\/<\/span>Dialog<\/span>><\/span><\/span>
\n <\/<\/span>teleport<\/span>><\/span><\/span>
\n <<\/span>teleport<\/span> to<\/span>=<\/span>"<\/span>#xxx"<\/span><\/span>><\/span><\/span>
\n <<\/span>Loading<\/span>><\/span><\/span><\/<\/span>Loading<\/span>><\/span><\/span>
\n <\/<\/span>teleport<\/span>><\/span><\/span>
\n<\/<\/span>div<\/span>><\/span><\/span><\/p>\n

\u76f4\u63a5\u5c06\u9700\u8981\u63d0\u5230\u5916\u5c42\u7684\u7ec4\u4ef6\u653e\u5230teleport\u6807\u7b7e\u91cc，\u901a\u8fc7to\u5c5e\u6027\u6765\u6307\u5b9a\u8981\u6302\u8f7d\u5230\u7684\u5143\u7d20，to\u53ef\u4ee5\u662f\u6709\u6548\u7684\u5143\u7d20\u67e5\u8be2\u9009\u62e9\u5668，\u6bd4\u5982id\u9009\u62e9\u5668，\u7c7b\u9009\u62e9\u5668\u7b49\u3002<\/p>\n

14.\u6e32\u67d3\u51fd\u6570\u7684\u53d8\u5316<\/h2>\n

\u57282.x\u4e2d\u4f7f\u7528render\u51fd\u6570\u9700\u8981\u4f7f\u7528\u6ce8\u5165\u7684\u65b9\u6cd5\u6765\u521b\u5efa\u865a\u62df\u8282\u70b9，\u793a\u4f8b\u5982\u4e0b：<\/p>\n

Vue.<\/span>component<\/span>(<\/span>'my-component'<\/span>,<\/span> {<\/span>
\n render<\/span>(<\/span>createElement<\/span>)<\/span> {<\/span>
\n return<\/span> createElement<\/span>(<\/span>'div'<\/span>,<\/span> '\u6211\u662f\u6587\u672c'<\/span>)<\/span>
\n }<\/span>
\n}<\/span>)<\/span><\/p>\n

\u57283.x\u4e2d\u4f7f\u7528vue\u5bf9\u8c61\u7684\u9759\u6001\u65b9\u6cd5\u6765\u5b9e\u73b0：<\/p>\n

Vue.<\/span>component<\/span>(<\/span>'my-component'<\/span>,<\/span> {<\/span>
\n render<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> Vue.<\/span>h<\/span>(<\/span>'div'<\/span>,<\/span> '\u6211\u662f\u6587\u672c'<\/span>)<\/span>
\n }<\/span>
\n}<\/span>)<\/span><\/p>\n

h\u51fd\u6570\u63a5\u6536\u7684\u53c2\u6570\u548ccreateElement\u57fa\u672c\u90fd\u662ftag\u3001props\u3001children，\u4f46\u662fprops\u7ed3\u6784\u53d1\u751f\u4e86\u5f88\u5927\u53d8\u5316，\u6bd4\u5982\u4e8b\u4ef6\u7ed1\u5b9a：<\/p>\n

Vue.<\/span>component<\/span>(<\/span>'my-component'<\/span>,<\/span> {<\/span>
\n render<\/span>(<\/span>createElement<\/span>)<\/span> {<\/span>
\n return<\/span> createElement<\/span>(<\/span>'div'<\/span>,<\/span> {<\/span>
\n on<\/span>:<\/span> {<\/span>
\n 'click'<\/span>:<\/span> this<\/span>.<\/span>clickCallback
\n }<\/span>
\n }<\/span>)<\/span>
\n }<\/span>
\n}<\/span>)<\/span>
\nVue.<\/span>component<\/span>(<\/span>'my-component'<\/span>,<\/span> {<\/span>
\n render<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> Vue.<\/span>h<\/span>(<\/span>'div'<\/span>,<\/span> {<\/span>
\n onClick<\/span>:<\/span> this<\/span>.<\/span>clickCallback
\n }<\/span>)<\/span>
\n }<\/span>
\n}<\/span>)<\/span><\/p>\n

\u57282.x\u4e2d\u4e0d\u652f\u6301v-model，3.x\u4e2d\u5df2\u7ecf\u652f\u6301\u4e86，\u5176\u4ed6\u53d8\u5316\u4e4b\u5904\u4e5f\u5f88\u5927，\u9700\u8981\u8bfb\u8005\u81ea\u5df1\u53bb\u8be6\u7ec6\u4e86\u89e3，\u8fd9\u4e00\u8282\u7684\u5b98\u65b9\u6587\u6863\u5e94\u8be5\u8fd8\u9700\u8981\u5b8c\u5584，props\u7684\u5177\u4f53\u63cf\u8ff0\u5e76\u672a\u770b\u5230，\u4f46\u662f\u5927\u81f4\u7684\u6539\u53d8\u5c31\u662f\u66f4\u52a0\u6241\u5e73\u5316，\u6bd4\u59822.x\u7684\u7ed3\u6784：<\/p>\n

{<\/span>
\n class<\/span>:<\/span> [<\/span>'xxx'<\/span>,<\/span> 'xxx'<\/span>]<\/span>,<\/span>
\n style<\/span>:<\/span> {<\/span> color<\/span>:<\/span> '#fff'<\/span> }<\/span>,<\/span>
\n attrs<\/span>:<\/span> {<\/span> id<\/span>:<\/span> 'xxx'<\/span> }<\/span>,<\/span>
\n domProps<\/span>:<\/span> {<\/span> innerHTML<\/span>:<\/span> 'xxx'<\/span> }<\/span>,<\/span>
\n on<\/span>:<\/span> {<\/span> click<\/span>:<\/span> onClick }<\/span>,<\/span>
\n key<\/span>:<\/span> 'xxx'<\/span>
\n}<\/span><\/p>\n

\u57283.x\u4e2d\u53d8\u6210\u8fd9\u6837：<\/p>\n

{<\/span>
\n class<\/span>:<\/span> [<\/span>'xxx'<\/span>,<\/span> 'xxx'<\/span>]<\/span>,<\/span>
\n style<\/span>:<\/span> {<\/span> color<\/span>:<\/span> '#fff'<\/span> }<\/span>,<\/span>
\n id<\/span>:<\/span> 'xxx'<\/span>,<\/span>
\n innerHTML<\/span>:<\/span> 'xxx'<\/span>,<\/span>
\n onClick<\/span>:<\/span> onClick,<\/span>
\n key<\/span>:<\/span> 'xxx'<\/span>
\n}<\/span><\/p>\n

15.\u63d2\u4ef6\u5f00\u53d1\u7684\u53d8\u5316<\/h2>\n

\u57282.x\u4e2d\u6ce8\u518c\u63d2\u4ef6\u65f6\u8c03\u7528\u63d2\u4ef6\u7684install\u65b9\u6cd5\u65f6\u4f1a\u6ce8\u5165Vue\u5bf9\u8c61\u548c\u53c2\u6570\u5bf9\u8c61，\u57283.x\u4e2d\u56e0\u4e3a\u5c06Vue\u4e0a\u7684\u5168\u5c40\u5c5e\u6027\u548c\u65b9\u6cd5\u90fd\u79fb\u5230\u4e86\u7531createApp\u65b9\u6cd5\u521b\u5efa\u7684\u5b9e\u4f8bapp\u4e0a，\u6240\u4ee5\u6ce8\u518c\u63d2\u4ef6\u9700\u8981\u5728createApp\u65b9\u6cd5\u6267\u884c\u4e4b\u540e，\u53e6\u5916\u6ce8\u5165\u529f\u80fd\u65f6\u4e5f\u4f1a\u6709\u4e00\u4e9b\u7ec6\u5fae\u7684\u53d8\u5316\u3002<\/p>\n

16.\u53bb\u6389\u4e86\u8fc7\u6ee4\u5668\u9009\u9879<\/h2>\n

\u57283.x\u4e2d\u53ef\u4ee5\u4f7f\u7528\u65b9\u6cd5\u6765\u5b9e\u73b0\u8be5\u529f\u80fd\u3002<\/p>\n

17.\u54cd\u5e94\u6027\u539f\u7406\u53d8\u5316<\/h2>\n

\u4f17\u6240\u5468\u77e5，\u57282.x\u4e2d\u662f\u4f7f\u7528Object.defineProperty\u6765\u5b9e\u73b0\u6570\u636e\u54cd\u5e94\u7684，\u57283.x\u9ed8\u8ba4\u4f7f\u7528ES6\u7684Proxy\u6765\u5b9e\u73b0，\u5e76\u4e14\u5728IE\u6d4f\u89c8\u5668\u4e0a\u4f7f\u7528Object.defineProperty\u8fdb\u884c\u964d\u7ea7\u3002<\/p>\n

\u53e6\u5916\u57283.x\u4e2d\u589e\u52a0\u4e86\u5f88\u591a\u53ef\u4ee5\u7528\u6765\u7ed9\u6570\u636e\u589e\u52a0\u54cd\u5e94\u884c\u529f\u80fd\u7684\u65b9\u6cd5，\u6bd4\u5982：<\/p>\n

\/\/ \u975e\u539f\u59cb\u503c<\/span>
\nimport<\/span> {<\/span>reactive}<\/span> from<\/span> 'vue'<\/span>
\n\/\/ \u54cd\u5e94\u5f0f\u72b6\u6001<\/span>
\nconst<\/span> state =<\/span> reactive<\/span>(<\/span>{<\/span>
\n count<\/span>:<\/span> 1<\/span>
\n}<\/span>)<\/span><\/p>\n

\/\/ \u539f\u59cb\u503c<\/span>
\nimport<\/span> {<\/span>ref}<\/span> from<\/span> 'vue'<\/span><\/p>\n

\/\/ \u54cd\u5e94\u5f0f\u72b6\u6001<\/span>
\nconst<\/span> count =<\/span> ref<\/span>(<\/span>0<\/span>)<\/span>
\nconsole.<\/span>log<\/span>(<\/span>count.<\/span>value)<\/span><\/p>\n

\u6b64\u5916\u8fd8\u65b0\u589e\u4e86computed\u3001watch\u7b49\u7b49\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u7684\u65b9\u6cd5，\u8fd9\u4e9b\u65b9\u6cd5\u4e00\u822c\u5728\u4f7f\u7528\u7ec4\u5408\u5f0fapi\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002<\/p>\n

18.\u65b0\u589e\u54cd\u5e94\u5f0f\u548c\u7ec4\u5408\u5f0fapi<\/h2>\n

\u8fd9\u4e2a\u5df2\u7ecf\u6709\u975e\u5e38\u591a\u7684\u6587\u7ae0\u8be6\u7ec6\u7684\u4ecb\u7ecd\u5b83\u4e86，\u53ef\u4ee5\u5728\u6398\u91d1\u4e0a\u641c\u7d22\u6216\u76f4\u63a5\u53bb\u5b98\u7f51\u4e0a\u770b，\u6b64\u5904\u4e0d\u8d58\u8ff0\u3002<\/p>\n

19.ref\u7684\u53d8\u5316<\/h2>\n

\u57282.x\u4e2dref\u662f\u7528\u6765\u8bbf\u95ee\u7ec4\u4ef6\u5b9e\u4f8b\u6216\u8005\u662fDOM\u5143\u7d20\u7684\u5c5e\u6027：<\/p>\n

<<\/span>div<\/span> ref<\/span>=<\/span>"<\/span>div"<\/span><\/span>><\/span><\/span>
\n <<\/span>ul<\/span>><\/span><\/span>
\n <<\/span>li<\/span> v-for<\/span>=<\/span>"<\/span>item in list"<\/span><\/span> ref<\/span>=<\/span>"<\/span>liList"<\/span><\/span>><\/span><\/span><\/<\/span>li<\/span>><\/span><\/span>
\n <\/<\/span>ul<\/span>><\/span><\/span>
\n<<\/span>MyComponent<\/span> ref<\/span>=<\/span>"<\/span>component"<\/span><\/span>><\/span><\/span><\/<\/span>MyComponent<\/span>><\/span><\/span>
\n<\/<\/span>div<\/span>><\/span><\/span><\/p>\n

export<\/span> default<\/span> {<\/span>
\n mounted<\/span>(<\/span>)<\/span> {<\/span>
\n console.<\/span>log<\/span>(<\/span>this<\/span>.<\/span>$refs.<\/span>div,<\/span> this<\/span>.<\/span>$refs.<\/span>component)<\/span>
\n console.<\/span>log<\/span>(<\/span>this<\/span>.<\/span>$refs.<\/span>liList)<\/span>\/\/ liList\u4f1a\u81ea\u52a8\u662f\u4e00\u4e2a\u6570\u7ec4<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u5176\u4e2d\u5f53\u5728\u5faa\u73af\u91cc\u4f7f\u7528ref\u662f\u4e0d\u660e\u786e\u7684，\u5c24\u5176\u662f\u5b58\u5728\u5d4c\u5957\u5faa\u73af，\u6240\u4ee5\u57283.x\u4e2dref\u652f\u6301\u7ed1\u5b9a\u5230\u4e00\u4e2a\u51fd\u6570：<\/p>\n

<<\/span>div<\/span> ref<\/span>=<\/span>"<\/span>div"<\/span><\/span>><\/span><\/span>
\n <<\/span>ul<\/span>><\/span><\/span>
\n <<\/span>li<\/span> v-for<\/span>=<\/span>"<\/span>item in list"<\/span><\/span> :ref<\/span>=<\/span>"<\/span>setLiList"<\/span><\/span>><\/span><\/span><\/<\/span>li<\/span>><\/span><\/span>
\n <\/<\/span>ul<\/span>><\/span><\/span>
\n<<\/span>MyComponent<\/span> ref<\/span>=<\/span>"<\/span>component"<\/span><\/span>><\/span><\/span><\/<\/span>MyComponent<\/span>><\/span><\/span>
\n<\/<\/span>div<\/span>><\/span><\/span><\/p>\n

export<\/span> default<\/span> {<\/span>
\n data<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n liList<\/span>:<\/span> [<\/span>]<\/span>
\n }<\/span>
\n }<\/span>
\n mounted<\/span>(<\/span>)<\/span> {<\/span>
\n console.<\/span>log<\/span>(<\/span>this<\/span>.<\/span>$refs.<\/span>div,<\/span> this<\/span>.<\/span>$refs.<\/span>component)<\/span>
\n console.<\/span>log<\/span>(<\/span>this<\/span>.<\/span>liList)<\/span>
\n }<\/span>,<\/span>
\n methods<\/span>:<\/span> {<\/span>
\n setLiList<\/span>(<\/span>el<\/span>)<\/span> {<\/span>
\n this<\/span>.<\/span>liList.<\/span>push<\/span>(<\/span>el)<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

20.Vue-Router\u53d8\u5316<\/h2>\n

vue-router\u5347\u7ea7\u5230\u4e86\u65b0\u7248\u672c，\u5b89\u88c5\u547d\u4ee4\u4e3a：npm install vue-router@4\u3002<\/p>\n

\u63a5\u4e0b\u6765\u4f7f\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u770b\u4e00\u4e0b2.x\u548c3.x\u7684\u533a\u522b：<\/p>\n

\/\/ 2.x<\/span>
\nimport<\/span> Vue from<\/span> 'vue'<\/span>
\nimport<\/span> VueRouter from<\/span> 'vue-router'<\/span>
\nVue.<\/span>use<\/span>(<\/span>VueRouter)<\/span>
\nconst<\/span> routes =<\/span> [<\/span>
\n \/\/ …<\/span>
\n]<\/span>
\nconst<\/span> router =<\/span> new<\/span> VueRouter<\/span>(<\/span>{<\/span>
\n \/\/ …\u4e00\u4e9b\u9009\u9879\u914d\u7f6e<\/span>
\n routes
\n}<\/span>)<\/span>
\nconst<\/span> app =<\/span> new<\/span> Vue<\/span>(<\/span>{<\/span>
\n router
\n}<\/span>)<\/span>.<\/span>$mount<\/span>(<\/span>'#app'<\/span>)<\/span><\/p>\n

\/\/ 3.x<\/span>
\nimport<\/span> Vue from<\/span> 'vue'<\/span>
\nimport<\/span> VueRouter from<\/span> 'vue-router@4'<\/span>
\nconst<\/span> routes =<\/span> [<\/span>
\n \/\/ …<\/span>
\n]<\/span>
\nconst<\/span> router =<\/span> VueRouter.<\/span>createRouter<\/span>(<\/span>{<\/span>
\n \/\/ …\u4e00\u4e9b\u9009\u9879\u914d\u7f6e<\/span>
\n routes
\n}<\/span>)<\/span>
\nconst<\/span> app =<\/span> Vue.<\/span>createApp<\/span>(<\/span>{<\/span>}<\/span>)<\/span>
\napp.<\/span>use<\/span>(<\/span>router)<\/span>
\napp.<\/span>mount<\/span>(<\/span>'#app'<\/span>)<\/span><\/p>\n

\u9664\u4e86\u521b\u5efa\u8def\u7531\u7684\u65b9\u5f0f\u6709\u53d8\u5316\u5916，\u5176\u4ed6\u4e5f\u6709\u5f88\u591a\u7ec6\u8282\u53d8\u5316，\u4ee5\u53ca\u5982\u4f55\u5728\u7ec4\u5408\u5f0fapi\u4e2d\u4f7f\u7528，\u7b14\u8005\u6ca1\u770b\u5b8c，\u8bf7\u81ea\u884c\u9605\u8bfbvue-router\u6587\u6863\u3002<\/p>\n

21.Vuex\u53d8\u5316<\/h2>\n

\u9664\u8def\u7531\u5916，\u5b98\u65b9\u7684\u72b6\u6001\u7ba1\u7406\u5e93vuex\u4e5f\u914d\u5957\u5347\u7ea7\u4e86\u65b0\u7248\u672c，\u5b89\u88c5：npm install vuex@next –save\u3002<\/p>\n

\u540c\u6837\u4ee5\u4e00\u4e2a\u5341\u5206\u7b80\u5355\u7684\u4f8b\u5b50\u770b\u4e00\u4e0b\u521d\u59cb\u5316\u7684\u53d8\u5316：<\/p>\n

\/\/ 2.x<\/span>
\nimport<\/span> Vue from<\/span> 'vue'<\/span>
\nimport<\/span> Vuex from<\/span> 'vuex'<\/span>
\nVue.<\/span>use<\/span>(<\/span>Vuex)<\/span>
\nconst<\/span> store =<\/span> new<\/span> Vuex.<\/span>Store<\/span>(<\/span>{<\/span>
\nstate<\/span>:<\/span> {<\/span>
\n count<\/span>:<\/span> 0<\/span>
\n }<\/span>,<\/span>
\n mutations<\/span>:<\/span> {<\/span>}<\/span>,<\/span>
\n actions<\/span>:<\/span> {<\/span>}<\/span>,<\/span>
\n \/\/ …<\/span>
\n}<\/span>)<\/span>
\nnew<\/span> Vue<\/span>(<\/span>{<\/span>
\n store
\n}<\/span>)<\/span><\/p>\n

\/\/ 3.x<\/span>
\nimport<\/span> {<\/span>createApp}<\/span> from<\/span> 'vue'<\/span>
\nimport<\/span> {<\/span>createStore}<\/span> from<\/span> 'vuex'<\/span>
\nconst<\/span> store =<\/span> createStore<\/span>(<\/span>{<\/span>
\n state<\/span>(<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n count<\/span>:<\/span>0<\/span>
\n }<\/span>
\n }<\/span>,<\/span>
\n mutations<\/span>:<\/span> {<\/span>}<\/span>,<\/span>
\n actions<\/span>:<\/span> {<\/span>}<\/span>,<\/span>
\n \/\/ …<\/span>
\n}<\/span>)<\/span>
\nconst<\/span> app =<\/span> createApp<\/span>(<\/span>{<\/span>}<\/span>)<\/span>
\napp.<\/span>use<\/span>(<\/span>store)<\/span><\/p>\n

vuex\u7684api\u57fa\u672c\u6ca1\u6709\u5927\u7684\u53d8\u5316，\u66f4\u591a\u7684\u53ef\u4ee5\u53bb\u4e86\u89e3\u4e00\u4e0b\u5982\u4f55\u5728\u7ec4\u5408\u5f0fapi\u4e2d\u4f7f\u7528\u3002<\/p>\n

22.\u5176\u4ed6\u53d8\u5316\u4e00\u89c8<\/h2>\n