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What I bring to you this time is how to pass parameters from parent to child components in vue.js. This article will give you a good analysis.
1. Create a new componentA.vue component with the following code:
const STORAGE_KEY = 'todos-vue.js' export default{ fetch(){ return JSON.parse(window.localStorage.getItem(STORAGE_KEY) || '[]') }, save(items){ window.localStorage.setItem(STORAGE_KEY,JSON.stringify(items)); } }
App.vue code is as follows:
<template> <div id="app"> <h1 v-text="title"></h1> <input v-model="newItem" v-on:keyup.enter="addNew"/> <ul> <li v-for="item in items" v-bind:class="{finished:item.isFinished}" v-on:click='toogleFinish(item)'> {{item.label}} </li> </ul> <!-- 使用组件,注意驼峰命名法转化成短线 --> <!-- 向自组件传数据 --> <Component-a msgfromfather='you die!'></Component-a> </div> </template> <script> import Store from './store' import ComponentA from './components/componentA' //该组件会被加载到该页面 export default { name: 'app', data () { return { title: 'this is a todo list', items:Store.fetch(), newItem:'' } }, components:{ //注册组件 ComponentA }, watch:{ items:{ handler(items){ //经过变化的数组会作为第一个参数传入 Store.save(items) }, deep:true //深度复制 } }, methods:{ toogleFinish(item){ item.isFinished = !item.isFinished }, addNew(){ this.items.push({ label:this.newItem, isFinished:false, }) this.newItem = '' } } } </script> <style> #app { font-family: 'Avenir', Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-align: center; color: #2c3e50; margin-top: 60px; } .finished{ text-decoration: underline; } </style>
componentA.vue code As follows:
<template> <div class="hello"> <h1>{{msg}}</h1> <h2>{{msgfromfather}}</h2> <button v-on:click="onClickMe">Click!</button> </div> </template> <<script> export default { data(){ return{ msg:'Hello form component a' } }, props:['msgfromfather'],//自组件接收数据 methods:{ onClickMe(){ console.log(this.msgfromfather); } } } </script> <style scoped> </style>
I believe you have mastered the method after reading the above introduction. For more exciting information, please pay attention to other related articles on the php Chinese website!
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