标签：var method Once stat 创建 text mon roo his
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
<child-one v-if="type == ‘child-one‘"></child-one>
<child-two v-if="type == ‘child-two‘"></child-two>
<button @click="handleButtonClick">change</button>
</div>
<script type="text/javascript">
Vue.component("child-one", {
template: `<div>child-one</div>`
});
Vue.component("child-two", {
template: `<div>child-two</div>`
});
var vm = new Vue({
el: "#root",
data: {
type: "child-one"
},
methods: {
handleButtonClick: function() {
this.type = (this.type == "child-one" ? "child-two" : "child-one");
}
}
})
</script>
</body>
</html>
同样的效果，使用动态组件(点击切换会销毁一个组件，创建另一个组件。很显然，这样对性能是有损耗的)：
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
//当然还可以用动态组件的方式(vue自带的标签，它指的就是一个动态组件)。动态组件的意思是：它会根据:is里面数据的变化自动加载不同的组件：
<component :is="type"></component>
<button @click="handleButtonClick">change</button>
</div>
<script type="text/javascript">
Vue.component("child-one", {
template: `<div>child-one</div>`
});
Vue.component("child-two", {
template: `<div>child-two</div>`
});
var vm = new Vue({
el: "#root",
data: {
type: "child-one"
},
methods: {
handleButtonClick: function() {
this.type = (this.type == "child-one" ? "child-two" : "child-one");
}
}
})
</script>
</body>
</html> 为了解决频繁销毁-创建，可以用v-once(因为这个v-once，在切换的时候会把要销毁的这个放内存里了。也就是不需要创建了，直接从内存里拿)
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
<!-- <child-one v-if="type == ‘child-one‘"></child-one>
<child-two v-if="type == ‘child-two‘"></child-two> -->
//当然还可以用动态组件的方式(vue自带的标签，它指的就是一个动态组件)。动态组件的意思是：它会根据:is里面数据的变化自动加载不同的组件：
<component :is="type"></component>
<button @click="handleButtonClick">change</button>
</div>
<script type="text/javascript">
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: "#root",
data: {
type: "child-one"
},
methods: {
handleButtonClick: function() {
this.type = (this.type == "child-one" ? "child-two" : "child-one");
}
}
})
</script>
</body>
</html> 标签：var method Once stat 创建 text mon roo his
原文地址：https://blog.51cto.com/5660061/2419544
