前言
我是歌谣 最好的种树是十年前 其次是现在 今天继续给大家带来的是原生js实现tab切换的讲解
环境配置
代码语言：javascript复制npm init -y
yarn add vite -D修改page.json配置端口
代码语言：javascript复制{
"name": "demo1",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"dev": "vite --port 3002"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"vite": "^4.4.9"
}
}目录结构
index.html
代码语言：javascript复制<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Tab</title>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<div class="tab J_tab"></div>
<!-- <div class="nav">
<div class="nav-item current">选项1</div>
<div class="nav-item">选项2</div>
<div class="nav-item">选项3</div>
</div> -->
<script type="text/html" id="J_navItemTpl">
<div class="{{navStyleClass}}">{{navItemTitle}}</div>
</script>
<!-- <div class="page">
<div class="page-item current">页面1</div>
<div class="page-item">页面2</div>
<div class="page-item">页面3</div>
</div> -->
<script type="text/html" id="J_pageItemTpl">
<div class="{{pageStyleClass}}">
<p>{{city_name}}</p>
<p>{{intro}}</p>
</div>
</script>
<div style="display: none;" id="J_cityData">
[{
"id":"1",
"city_name":"北京",
"intro":"北京很棒"
},
{
"id":"2",
"city_name":"上海",
"intro":"上海很棒"
},
{
"id":"3",
"city_name":"天津",
"intro":"天津很棒"
}]
</div>
<script src="./tools.js"></script>
<script src="./index.js"></script>
<script type="text/javascript">
var tab = new Tab({
classObject: {
el: '.J_tab'
}
}).init()
</script>
</body>
</html>index.js
代码语言：javascript复制; (function (doc, initTools) {
var Tab = function (options) {
this.oTab = doc.getElementsByClassName('J_tab')[0];
this.oNav = doc.createElement("div")
this.oPage = doc.createElement("div")
this.oNav.className = 'nav'
this.oPage.className = 'page'
// this.oPage = oTab.getElementsByClassName('page')[0]
// this.oNav = oTab.getElementsByClassName('nav')[0]
// this.oNavItems = this.oNav.getElementsByClassName('nav-item')
// this.oPageItem = this.oPage.getElementsByClassName('page-item')
this.navItemTpl = doc.getElementById("J_navItemTpl").innerHTML;
this.pageItemTpl = doc.getElementById("J_pageItemTpl").innerHTML;
var cityDataDom = doc.getElementById('J_cityData').innerHTML
console.log(cityDataDom)
this.cityData = JSON.parse(doc.getElementById('J_cityData').innerHTML);
this.curIdx = 0
// this.classObject=options.classObject
}
Tab.prototype.init = function () {
this.render()
this.bindEvent()
}
Tab.prototype.renderNav = function (data) {
var list = ''
data.forEach((item, index) => {
list = this.navItemTpl.replace(/{{(.*?)}}/g, function (node, key) {
return {
navStyleClass: !index ? 'nav-item current' : 'nav-item',
navItemTitle: item.city_name
}[key];
})
}, this);
console.log(list)
return list
}
Tab.prototype.renderPage = function (data) {
var list = ''
data.forEach((item, index) => {
list = this.pageItemTpl.replace(/{{(.*?)}}/g, function (node, key) {
return {
pageStyleClass: !index ? 'page-item current' : 'page-item',
city_name: item.city_name,
intro: item.intro
}[key];
})
}, this);
console.log(list)
return list
}
Tab.prototype.render = function () {
var oFrag = doc.createDocumentFragment()
this.oNav.innerHTML = this.renderNav(this.cityData)
this.oPage.innerHTML = this.renderPage(this.cityData)
oFrag.append(this.oNav)
oFrag.append(this.oPage)
this.oTab.appendChild(oFrag)
}
Tab.prototype.bindEvent = function () {
this.oNavItems = this.oNav.getElementsByClassName('nav-item')
this.oPageItem = this.oPage.getElementsByClassName('page-item')
this.oNav.addEventListener('click', this.onNavClick.bind(this), false)
}
Tab.prototype.onNavClick = function (ev) {
var tar = initTools.getTarget(ev)
var className = tar.className
if (className === 'nav-item') {
this.setCurrent(this.curIdx, 'remove')
// this.oNavItems[this.curIdx].className = 'nav-item'
// this.oPageItem[this.curIdx].className = 'page-item'
this.curIdx = [].indexOf.call(this.oNavItems, tar)
// this.oNavItems[this.curIdx].className = ' current'
// this.oPageItem[this.curIdx].className = ' current'
this.setCurrent(this.curIdx, 'add')
}
}
Tab.prototype.setCurrent = function (index, field) {
// var navItemClass = this.classObject.navItem
// var pageItemClass = this.classObject.pageItem
switch (field) {
case 'add':
this.oNavItems[index].className = 'nav-item current';
this.oPageItem[index].className = 'page-item current';
break;
case 'remove':
this.oNavItems[index].className = 'nav-item'
this.oPageItem[index].className = 'page-item'
break;
default:
break;
}
}
window.Tab = Tab
})(document, initTools)index.css
代码语言：javascript复制.tab{
width: 500px;
height: 500px;
margin:50px auto;
border: 1px solid #000;
}
.tab .nav{
height: 50px;
border-bottom: 1px solid #000;
}
.tab .nav-item{
float: left;
width: 33.33%;
height: 100%;
text-align: center;
line-height: 50px;
}
.tab .nav-item.current{
background-color: #000;
color: #fff;
}
.tab .page{
position: relative;
height: 450px;
}
.tab .page-item{
display: none;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
text-align: center;
/* line-height: 450px; */
font-size: 100px;
}
.tab .page-item.current{
display: block;
}
运行结果
