代码
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<keep-alive>
<component :is="currentView"></component>
</keep-alive>
<button @click="changeView('A')">切换到A</button>
<button @click="changeView('B')">切换到B</button>
<button @click="changeView('C')">切换到C</button>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
Vue.component('ComponentA', {
template: '<div> 组件 A </div>',
created() {
console.log('组件A created')
}
})
Vue.component('ComponentB', {
template: '<div> 组件 B </div>',
created() {
console.log('组件B created')
}
})
Vue.component('ComponentC', {
template: '<div> 组件 C </div>',
created() {
console.log('组件C created')
}
})
var vm = new Vue({
el: '#app',
data() {
return {
currentView: 'ComponentB'
}
},
methods: {
changeView(name) {
this.currentView = `Component${name}`
}
}
})
</script>
</html>
运行结果