1、全局api
| Vue.config.xxx | app.config.xxx |
| Vue.component | app.component |
| Vue.directive | app.directive |
| Vue.mixin | app.mixin |
| Vue.use | app.use |
| Vue.prototype | app.config.globalProperties |
2、过度类名
.v-enter-from, .v-leave-to{opacity:0; }.v-leave-from, .v-enter-to{opacity:1; }
3、父组件绑定事件
<my-component:close="test"
/>
子组件声明自定义事件
export default{emits:['close'] }
4、移除过滤器
