<!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">
<App></App>
</div>
<script src="./vue.js"></script>
<script>
Vue.component('Test', {
data() {
return {
msg: "Test组件",
}
},
template: `
<div>
<h3>{{msg}}</h3>
</div>
`,
})
const App = {
mounted(){
// 1.如果给标签添加ref,获取的就是真实的DOM节点
// 2.如果给子组件添加ref,获取的是当前子组件对象
console.log(this.$refs.btn);
// 加载页面,自动获取焦点
this.$refs.input.focus();
console.log(this.$refs.test);
},
components: {},
template: `
<div>
<Test ref='test'></Test>
<input type="text" ref='input'/>
<button ref='btn'>改变生死</button>
</div>
`,
}
new Vue({
el: '#app',
components: {
App
}
})
</script>
</body>
</html>
