原生编写组件 Web Components

原生代码实现:
<template id="userCardTemplate">
<style>...</style>
<img class="image">
<div class="container">
<p class="name"></p>
<p class="email"></p>
<button class="button">Follow John</button>
</div>
</template>
<script>
class UserCard extends HTMLElement {
constructor() {
super();
// 开启 Shadow DOM,隐藏内部代码模式
var shadow = this.attachShadow( { mode: 'closed' } );
var templateElem = document.getElementById('userCardTemplate');
var content = templateElem.content.cloneNode(true);
content.querySelector('img').setAttribute('src', this.getAttribute('image'));
content.querySelector('.container>.name').innerText = this.getAttribute('name');
content.querySelector('.container>.email').innerText = this.getAttribute('email');
shadow.appendChild(content);
}
}
window.customElements.define('user-card', UserCard);
</script>
页面中直接使用:
<user-card image="https://semantic-ui.com/images/avatar2/large/kristy.png" name="User Name" email="yourmail@some-email.com" ></user-card>
参考链接:https://www.ruanyifeng.com/blog/2019/08/web_components.html

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