标签：DOM app Declarative scoped AppCard Shadow
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<app-card>
<template shadowrootmode="open">
<style>
/* Styles scoped to this element */
</style>
<div>
<!-- Template content -->
</div>
<slot></slot>
</template>
<!-- Light DOM content that will be projected through the slot -->
</app-card>
<script>
class AppCard extends HTMLElement {
constructor() {
super();
// No need to attach shadow root here, it's done declaratively in HTML
}
}
customElements.define("app-card", AppCard);
</script>
</body>
</html>
标签：DOM,
app,
Declarative,
scoped,
AppCard,
Shadow
From： https://www.cnblogs.com/soarowl/p/18362264