2. 更新组件的key 在Vue 中,key是用于标识 VNode 的唯一值。更新key会使 Vue 认为这是一个全新的组件实例,从而销毁旧的实例并创建新的实例。通过这种方式,我们可以强制组件更新,而不需要修改其内部逻辑。 示例代码: <template> <MyComponent :key="componentKey" /> Force Update </template> export default ...
<template>重新渲染<ChildComponent :key="key"></ChildComponent></template>import ChildComponent from './ChildComponent.vue';export default {data() {return {key: 0};},methods: {forceRerender() {this.key += 1;}},components: {ChildComponent}}; 在这个示例中,每次点击按钮,key会增加1,这会导...
刚开始 renderComponent设置为true,因此渲染 my-component 组件 当我们调用forceRerender时,我们立即将renderComponent设置为false 我们停止渲染my-component,因为v-if指令现在计算结果为false 在nextTick方法中将renderComponent设置回true 当v-if指令的计算结果为true时,再次渲染my-component 在Vue中,一个 tick 是一个DOM...
app.component('parent-component', { data() { return { user: {name:"Uma Victor", address:"No 33 Rumukwurushi"} } }, provide() { return { userAddress: Vue.computed(() => this.user) } }, template: ` ... ` }) 与使用 Vuex 相比,这种模式非常有用且简单。 然而,随着 Vue3 和最近...
刚开始renderComponent设置为true,因此渲染my-component组件 当我们调用forceRerender时,我们立即将renderComponent设置为false 我们停止渲染my-component,因为v-if指令现在计算结果为false 在nextTick方法中将renderComponent设置回true 当v-if指令的计算结果为true时,再次渲染my-component ...
Version 3.0.11 Reproduction link https://jsfiddle.net/posva/km2qpwx7/ Steps to reproduce In Vue2 we can call this.$forceUpdate() to force update a component. Once I switched to Vue 3 Composition API, seems this feature is lost... How can...
vuejs/Discussion#356 when you want to totally re-render the component, use key instead of $forceUpdate. Sometimes, it can solve the problem which $forceUpdate can't solve.
Until now, every thing about force update has been solved. I haven't met problems which can't be solved by ways above. However, there is some way stronger I have to mention. v-if/key In some cases, we do need to destroy and rebuild the component. But I didn't find any API about...
在v16中,使用Portal创建Dialog组件简单多了,不需要牵扯到componentDidMount、componentDidUpdate,也不用调用API清理Portal,关键代码在render中,像下面这样就行: import React from 'react'; import {createPortal} from 'react-dom'; class Dialog extends React.Component { ...
* **core:** fix sameVnode for async component (#11107) 5260830, closes #11107 * **core:** remove trailing comma in function signature (#10845) 579e1ff, closes #10845 #10843 * **errorHandler:** async error handling for watchers (#9484) e4dea59, closes #9484 ...