<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
</div>
<script src="js/vue.3.2.2.js"></script>
<script>
// 1、创建Vue的实例对象
const app = Vue.createApp({
data(){//定义数据
return {
msg:'你好！',
cItem:'btn_1'
}
},
methods:{
change(){
if(this.cItem==='btn_1'){
this.cItem='input_1';
}else if(this.cItem==='input_1'){
this.cItem='btn_1';
}
}
},
template:'<h1>{{msg}}</h1>' +
'<div>' +
// '<btn_1 v-show="cItem==\'btn_1\'"></btn_1>' +
// '<input_1 v-show="cItem==\'input_1\'"></input_1>'+
'<keep-alive><component :is="cItem"></component></keep-alive>'+<!-- 动态组件component :is 保持缓存 keep-alive -->
'<button @click="change">btn</button>'+
'</div>'
});
app.component('btn_1',{template: '<button>btn_1</button>'});
app.component('input_1',{template:'<input type="text"/>'});
app.mount('#app');
</script>
</body>
</html>
