使用v-once指令提高静态内容展示效率，减少频繁创建和销毁dom的操作；
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>动态组件与v-once指令</title>
<script src='./vue.js'></script>
</head>
<body>
<div id="app">
<child-one v-if="type === 'child-one'"></child-one>
<child-two v-if="type === 'child-two'"></child-two>
<button @click="handleBtnClick">change</button>
</div>
<script>
// 不使用动态组件
Vue.component('child-one', {
template: '<div>child-one</div>'
})
Vue.component('child-two', {
template: '<div>child-two</div>'
})
var vm = new Vue({
el: '#app',
data: {
type: 'child-one'
},
methods: {
handleBtnClick: function() {
this.type = this.type === 'child-one' ? 'child-two' : 'child-one'
}
}
})
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>动态组件与v-once指令</title>
<script src='./vue.js'></script>
</head>
<body>
<div id="app">
<component :is="type"></component>
<button @click="handleBtnClick">change</button>
</div>
<script>
// 使用动态组件
Vue.component('child-one', {
template: '<div>child-one</div>'
})
Vue.component('child-two', {
template: '<div>child-two</div>'
})
var vm = new Vue({
el: '#app',
data: {
type: 'child-one'
},
methods: {
handleBtnClick: function() {
this.type = this.type === 'child-one' ? 'child-two' : 'child-one'
}
}
})
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>动态组件与v-once指令</title>
<script src='./vue.js'></script>
</head>
<body>
<div id="app">
<child-one v-if="type==='child-one'"></child-one>
<child-two v-if="type==='child-two'"></child-two>
<button @click="handleBtnClick">change</button>
</div>
<script>
// 使用v-once指令提高静态内容展示效率，减少频繁创建和销毁dom的操作
Vue.component('child-one', {
template: '<div v-once>child-one</div>'
})
Vue.component('child-two', {
template: '<div v-once>child-two</div>'
})
var vm = new Vue({
el: '#app',
data: {
type: 'child-one'
},
methods: {
handleBtnClick: function() {
this.type = this.type === 'child-one' ? 'child-two' : 'child-one'
}
}
})
</script>
</body>
</html>
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