Vue开发中常见的套路和技巧总结

export default {
 name: '名称',
 components: { // 组件挂载a},
 created(){} // 数据获取
 beforeMount() {}, // 数据获取
 data: () => ({}), //响应式数据
 computed: {} // 计算属性集合
 methods: {} // 方法集合
 ... // 销毁页面不要的资源
}

async beforeMount(){
 // 开始加载
 this.loading = true
 try {
 const data = await getUserInfo()
 } catch (error) {
 console.log(error)
 } finally {
 // 停止加载
 this.loading = false
 }
}

proxy: {
 "/api": {
 target: 'http://.......',
 changeOrigin: true, // 是否改变域名
 ws: true, // socket
 pathRewrite: {
 // 路径重写
 "/api": '' // 对拼接内容进行重写
 }
 },
 ....
}

-- config
--- dev.js
--- build.js
--- public.js
vue.config.js

# 代码 vue.config.js
const devConfig = require('./config/dev')
const buildConfig = require('./config/build')
module.exports = process.env.NODE_ENV === 'development' ? devConfig : buildConfig

// 计算属性
computed: {
 filterList: function () {
 return this.showData.filter(function (data) {
 // 返回需要显示的数据
 return data.isShow
 })
}
 
// DOM
 
<ul>
 <li v-for="item in filterList" :key="item.id">
 {{ item.name }}
 </li>
</ul>

 tableFactory(action) {
 switch (action) {
 case 'update':
 ...
 break;
 
 case 'create':
 ...
 break;
 
 case 'delete':
 ...
 break;
 
 default:
 // ...默认获取列表
 break;
 }
}

props: {
 test: {
  type: String,
  default: ''
 },
 test2: {
  type: [Number, String],
  default: 1
 },
 test3: {
  required: false,
  type: Object
 }
}

// GanMessage.vue组件
export default {
 name: 'GanMessage'
 .....
}

// 引入后使用
components: {
 [GanMessage.name]: GanMessage
}

// 模板中使用
<template>
 <gan-message/>
</template>

vue.prototype.$logs = window.console.log;

// 使用
<template>
 {{$logs('1111')}}
</template>

async beforeMount(){
 const data = await getUserInfo();
}

async beforeMount(){
 try {
  const data = await getUserInfo()
 } catch (error) {
  console.log(error)
 } finally {}
}

watch: {
 obj: {
  handler(newName, oldName) {
   console.log('obj.a changed');
  },
  immediate: true,
  deep:true
 },
 'obj.a': {
 handler(newName, oldName) {
  console.log('obj.a changed');
 },
 immediate: true,
 // deep: true
 }
 
 } 

<!-- Child -->
<template>
 <input type="text" @input="$emit('custom-event', 'hello')" />
</template>

<!-- Parent -->
<template>
 <Child @custom-event="handleCustomevent" />
</template>

<script>
export default {
 methods: {
 handleCustomevent (value) {
  console.log(value) // hello
 }
 }
}
</script>