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index copy.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Web Component</title>
<style>
* {
box-sizing: border-box;
}
body {
font-size: 14px;
}
.box {
padding: 5px 0 30px;
}
.box .caption {
display: none;
}
.box h1 {
text-align: center;
}
.box li {
color: #666;
font-size: 14px;
line-height: 1.8;
margin-top: 15px;
}
.img {
display: block;
width: 80%;
margin: 0 !important;
}
.card-head {
display: flex;
justify-content: space-between;
align-items: center;
}
.card-title {
color: #333;
font-size: 16px;
}
.card-head-btn {
color: #409eff;
cursor: pointer;
text-decoration: none !important;
}
.card-head-btn:hover {
text-decoration: none;
}
</style>
</head>
<body>
<div class="box">
<h1>Web Component</h1>
<com-card data-show-head="0" data-url="https://tiven.cn" data-title="天问博客">
<div slot="head" class="card-head">
<div class="card-title">卡片名称</div>
<a class="card-head-btn">操作按钮</a>
</div>
<img class="img" src="https://tiven.cn/static/img/kpl-sunwukong-a3Lt-ed2NG9r4NFDm_9DA.jpg" alt="天問">
</com-card>
<br>
<br>
<com-card data-show-head="1" data-url="https://tiven.cn/p/de241e23/" data-title="Vite+Vue3+Vant快速构建项目">
<div slot="head" class="card-head">
<div class="card-title">卡片名称</div>
<a class="card-head-btn" onclick="hello()">操作按钮</a>
</div>
<img class="img" src="https://tiven.cn/static/img/kpl-xuance-JqX71qH7aTflHV_gqvhIc.jpg" alt="天問">
<ol>
<li>君不见黄河之水天上来，奔流到海不复回。</li>
<li>君不见高堂明镜悲白发，朝如青丝暮成雪。</li>
<li>天生我材必有用，千金散尽还复来。</li>
</ol>
</com-card>
</div>
<template id="custom-card-template">
<style>
.com-card {
min-width: 200px;
min-height: 100px;
border-radius: 4px;
border: 1px solid #ebeef5;
background-color: #fff;
overflow: hidden;
color: #303133;
transition: .3s;
box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
}
.com-card-head {
padding: 10px 20px;
border-bottom: 1px solid #ebeef5;
box-sizing: border-box;
}
.com-card-body {
padding: 20px;
}
.link-wrap {
text-align: left;
padding-top: 20px;
}
.link {
display: inline-block;
height: 42px;
line-height: 43px;
padding: 0 30px;
text-align: center;
cursor: pointer;
color: #fff;
background-color: #409eff;
border-color: #409eff;
-webkit-appearance: none;
box-sizing: border-box;
outline: none;
transition: .1s;
font-weight: 500;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
font-size: 14px;
border-radius: 4px;
text-decoration: none !important;
}
</style>
<div class="com-card">
<div class="com-card-head">
<slot name="head"></slot>
</div>
<div class="com-card-body">
<slot></slot>
<div class="link-wrap">
<a class="link" href="" title=""></a>
</div>
</div>
</div>
</template>
<script>
class ComCard extends HTMLElement {
constructor() {
super();
var shadow = this.attachShadow({mode: 'closed'}) // open
var tplEle = document.getElementById('custom-card-template')
var content = tplEle.content.cloneNode(true)
var attrList = Array.from(this.attributes);
var props = attrList.reduce((prev, item)=>{
prev[item.name] = item.value
return prev
}, {})
if (props['data-show-head']!=='1') {
var head = content.querySelector('.com-card-head')
head.remove()
}
var urlEle = content.querySelector('.link')
if (props['data-url'] && props['data-title']) {
urlEle.href = props['data-url']
urlEle.title = props['data-title']
urlEle.innerText = props['data-title']
} else {
urlEle.remove()
}
shadow.appendChild(content)
}
connectedCallback(){
//在这里发送数据请求（Ajax）
console.log('connectedCallback')
}
//被从文档DOM中删除时调用
disconnectedCallback(){
console.log('disconnectedCallback')
}
//被移动到新的文档时调用
adoptedCallback(){
console.log('adoptedCallback')
}
//当增加、删除、修改自身的属性时被调用
attributeChangedCallback(){
console.log('attributeChangedCallback')
}
}
window.customElements.define('com-card', ComCard);
function hello() {
alert('Hello，Web Component')
}
</script>
</body>
</html>