代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>插槽</title>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
</head>
<body>
<div id="root">
<child>
<p>World</p>
</child>
</div>
<script>
Vue.component('child',{
template:'<div><p>Hello</p><slot 默认内容></slot></div>'
});
var vm=new Vue({
el:'#root',
})
</script>
</body>
</html>
效果；
