使用es6实现iview的选项卡切换

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代码如下:

<!DOCTYPE html>
<html lang=”en”>

<head>
<meta charset=”UTF-8″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
<meta http-equiv=”X-UA-Compatible” content=”ie=edge”>
<title> 选项卡切换 </title>
</head>

<body>
<my-tabs
index=”0″
titles=”[‘ 首页 ’,’ 核心产品 ’,’ 项目案例 ’]”
contents=”[‘<h1> 公司地址:</h1><article> 公司位于四川省成都市武侯区 XX 街道 </article>’,'<h2> 核心的产品 1 </h2><p>XXAPP 是为 XXX 公司服务二产生的 </p>’,'<a href=https://www.iviewui.com/ target=_blank> 项目地址 </a>’]”>
</my-tabs>
<script>
function ewEval(str) {
return new Function(‘return ‘ + str)();
}
class MyTabs extends HTMLElement {
constructor() {
super();
const shadom = this.attachShadow({
mode: “open”
});
let count = ewEval(this.getAttribute(‘index’)) || 0,
tabTitles = ewEval(this.getAttribute(‘titles’)) || [‘ 标签一 ’, ‘ 标签二 ’, ‘ 标签三 ’],
tabContent = ewEval(this.getAttribute(‘contents’)) || [‘ 标签一的内容 ’, ‘ 标签二的内容 ’, ‘ 标签三的内容 ’],
title_len = tabTitles.length,
content_len = tabContent.length;
let header = document.createElement(‘header’);
for (let i = 0; i < title_len; i++) {
let buttons = document.createElement(‘button’);
buttons.innerHTML = tabTitles[i];
if (count === i) buttons.classList.add(‘active’);
buttons.onclick = function () {
let curIndex = tabTitles.indexOf(this.textContent);
let _buttons = shadom.querySelectorAll(‘button’),
_divs = shadom.querySelectorAll(‘div’);
for (let j = 0,len = _buttons.length; j < len; j++) {
if (curIndex !== j) {
_buttons[j].classList.remove(‘active’);
_divs[j].classList.remove(‘active’);
}
_buttons[curIndex].classList.add(‘active’);
_divs[curIndex].classList.add(‘active’);
}
}
header.appendChild(buttons);
}
shadom.appendChild(header);
for (let _i = 0; _i < content_len; _i++) {
let divs = document.createElement(‘div’);
divs.innerHTML = tabContent[_i];
if (count === _i) divs.classList.add(‘active’);
shadom.appendChild(divs);
}
let style = document.createElement(‘style’);
style.textContent = `
header{
border-bottom:1px solid #dcdee2;
height:35px;
}
button{
outline:none;
cursor:pointer;
color:#515a6e;
margin-left:15px;
font-size:14px;
transition:color .2s linear,border-bottom .2s linear;
background-color:transparent;
padding:0 13px;
height:35px;
display:inline-block;
border:none;
}
a{
text-decoration:none;
color:#515a6e;
}
a:hover,a:active{
color:#2196ff;
}
button.active{
color:#2196ff;
border-bottom:1px solid #2192ff;
}
div{
display:none;
padding:13px 0;
}
div.active{
display:block;
}`;
shadom.appendChild(style);
}
}
customElements.define(‘my-tabs’, MyTabs);
</script>
</body>