vue.js 父向子组件传参的实例代码
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2022-07-06 20:55:16
1.新建componenta.vue组件,代码如下:
store.js代码如下:
const storage_key = 'todos-vue.js'
exp...
1.新建componenta.vue组件,代码如下:
store.js代码如下:
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代码如下:
<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代码如下:
<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>
点击按钮之后效果图如下:
总结
以上所述是小编给大家介绍的vue.js 父向子组件传参的实例代码,希望对大家有所帮助!