动态组件
释义：运行时在组件之间动态切换的方法。可以将多个条件组件（使用
v-if、v-else-if、v-else切换的组件）简化为一行代码
看个例子 一般来讲，我们会这样实现一个tabs的切换
<template>
<div id="app">
<button v-for="item in tabs" :key="item" @click="onClickTabs(item)">{{item}}</button>
<Buy v-if="index==='Buy'"/>
<cutUp v-else-if="index==='cutUp'"/>
<Fried v-else/>
</div>
</template>
<script>
import Buy from "./components/Buy.vue";
import cutUp from "./components/cutUp.vue";
import Fried from "./components/Fried.vue";
export default {
name: "app",
components: {
Buy,
cutUp,
Fried,
},
created() {},
data() {
return {
tabs: ["Buy", "cutUp", "Fried"],
index:'Buy'
};
},
methods: {
onClickTabs(item){
console.log(item,9999);
this.index=item
}
},
};
</script>
<style lang="scss" scoped>
</style>而动态组件形式则可以写成
<template>
<div id="app">
<button v-for="item in tabs" :key="item" @click="onClickTabs(item)">{{item}}</button>
<component :is="index"></component>
</div>
</template>
<script>
import Buy from "./components/Buy.vue";
import cutUp from "./components/cutUp.vue";
import Fried from "./components/Fried.vue";
export default {
name: "app",
components: {
Buy,
cutUp,
Fried,
},
created() {},
data() {
return {
tabs: ["Buy", "cutUp", "Fried"],
index:'Buy'
};
},
methods: {
onClickTabs(item){
console.log(item,9999);
this.index=item
}
},
};
</script>
<style lang="scss" scoped>
</style>在以上例子中，
v-if加组件名被components加is替换掉了。至于其他，则没太多分别。该传data传data，该传状态传状态。
补充：动态调用组件示例
<div id="app">
<button @click="changeComponent('coma')">coma</button>
<button @click="changeComponent('comb')">comb</button>
<button @click="changeComponent('comc')">comc</button>
<component :is="com_name"></component>
</div>
<script>
var coma = {
template: '<div>aaaa</div>'
}
var comb = {
template: '<div>bbbb</div>'
}
var comc = {
template: '<div>cccc</div>'
}
let vm = new Vue({
el: '#app',
data: {
com_name: 'coma'
},
components: {
coma: coma,
comb: comb,
comc: comc,
},
methods: {
changeComponent: function(name) {
this.com_name = name
}
}
})
</script>
总结
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