<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>filmMobile</title>
</head>
<body>
<div id="app">
{{m}} <br>
<todo-item></todo-item>
</div>
</body>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script>
// 定义名为 todo-item 的新组件
Vue.component('todo-item', {
template: '<p>这是个待办项组件</p>'
})
var app= new Vue({
el:"#app",
data:{
m:"hello vue.js",
},
});
</script>
</html>
注意的坑：应该先注册组件，后创建实例。否则报错；
组件保持范围。居于实例容器里面