有点逻辑 上代码
thml布局
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<!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>面向对象 Tab</title>
<link rel="stylesheet" href="./styles/tab.css">
<link rel="stylesheet" href="./styles/style.css">
</head>
<body>
<main>
<h4>
Js 面向对象 动态添加标签页
</h4>
<div class="tabsbox" id="tab">
<!-- tab 标签 -->
<nav class="fisrstnav">
<ul>
<li class="liactive"><span>测试1</span><span class="iconfont icon-guanbi"></span></li>
<li><span>测试2</span><span class="iconfont icon-guanbi"></span></li>
<li><span>测试3</span><span class="iconfont icon-guanbi"></span></li>
</ul>
<div class="tabadd">
<span>+</span>
</div>
</nav>
<!-- tab 内容 -->
<div class="tabscon">
<section class="conactive">测试1</section>
<section>测试2</section>
<section>测试3</section>
</div>
</div>
</main>
<script src="./tabs.js"></script>
</body>
</html>css样式
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* {
margin: 0;
padding: 0;
}
ul li {
list-style: none;
}
main {
width: 960px;
height: 500px;
border-radius: 10px;
margin: 50px auto;
}
main h4 {
height: 100px;
line-height: 100px;
text-align: center;
}
.tabsbox {
width: 900px;
height: 400px;
margin: 0 auto;
border: 1px solid lightsalmon;
position: relative;
}
nav ul {
overflow: hidden;
}
nav ul li {
float: left;
width: 100px;
height: 50px;
line-height: 50px;
text-align: center;
border-right: 1px solid #ccc;
position: relative;
}
nav ul li.liactive {
border-bottom: 2px solid #fff;
z-index: 9;
}
#tab input {
width: 80%;
height: 60%;
}
nav ul li span:last-child {
position: absolute;
user-select: none;
font-size: 12px;
top: -18px;
right: 0;
display: inline-block;
height: 20px;
}
.tabadd {
position: absolute;
/* width: 100px; */
top: 0;
right: 0;
}
.tabadd span {
display: block;
width: 20px;
height: 20px;
line-height: 20px;
text-align: center;
border: 1px solid #ccc;
float: right;
margin: 10px;
user-select: none;
}
.tabscon {
width: 100%;
height: 300px;
position: absolute;
padding: 30px;
top: 50px;
left: 0px;
box-sizing: border-box;
border-top: 1px solid #ccc;
}
.tabscon section,
.tabscon section.conactive {
display: none;
width: 100%;
height: 100%;
}
.tabscon section.conactive {
display: block;
}删除iconfont字体图标
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@font-face {font-family: "iconfont";
src: url('./iconfont/iconfont.eot?t=1553960438096'); /* IE9 */
src: url('./iconfont/iconfont.eot?t=1553960438096#iefix') format('embedded-opentype'), /* IE6-IE8 */
url('data:application/x-font-woff2;charset=utf-8;base64,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') format('woff2'),
url('./iconfont/iconfont.woff?t=1553960438096') format('woff'),
url('./iconfont/iconfont.ttf?t=1553960438096') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+ */
url('./iconfont/iconfont.svg?t=1553960438096#iconfont') format('svg'); /* iOS 4.1- */
}
.iconfont {
font-family: "iconfont" !important;
font-size: 16px;
font-style: normal;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.icon-guanbi:before {
content: "\e676";
}
js代码
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var that;
class Tab {
constructor(id) {
// 定义全局this
that = this;
// 获取元素
this.main = document.querySelector(id)
//获取加号按钮
this.add = this.main.querySelector('.tabadd')
//获取li的父元素
this.ul = this.main.querySelector('.fisrstnav ul:first-child')
//获取section的父元素
this.fsection = this.main.querySelector('.tabscon')
this.init();
}
//初始化的方法 处理所有点击事件
init() {
this.updateNode();
this.add.onclick = this.addTab;
//init初始化操作让相关的元素绑定事件
for (var i = 0; i < this.lis.length; i++) {
// 给li添加一个索引
this.lis[i].index = i;
//因为点击做切换功能 所以点击了li直接等于toggleTab切换操作函数
this.lis[i].onclick = this.toggleTab;
//x号按钮跟小li是一样的 所以写在li的for循环里
this.remove[i].onclick = this.removeTab;
//给每一个span添加双击事件
this.spans[i].ondblclick = this.editTab;
//给每一个sections添加双击事件
this.sections[i].ondblclick = this.editTab;
}
}
//获取所有小li和section
updateNode() {
//获取所有的小li
this.lis = this.main.querySelectorAll('li')
//获取所有的section
this.sections = this.main.querySelectorAll('section')
//获取x号关闭的按钮
this.remove = this.main.querySelectorAll('.icon-guanbi')
//获取所有的span
this.spans = this.main.querySelectorAll('.fisrstnav li span:first-child')
}
//1、切换功能
toggleTab() {
that.clearClass();
//点击了li就给他的class添加liactive类名
this.className = 'liactive'
//点击li内容也跟着变所以
that.sections[this.index].className = 'conactive'
}
//点击每个li就要清楚其他样式 所以定义一个专门清楚样式函数
clearClass() {
//再次循环li
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].className = '';
this.sections[i].className = '';
}
}
//2、添加功能
addTab() {
//添加之前清除掉所以小li
that.clearClass()
//生成一个随机数
var random = Math.random()
//1.点击创建li元素和section元素
var li = ' <li class="liactive"><span>新选项卡</span><span class="iconfont icon-guanbi"></span></li>'
var section = '<section class="conactive">测试' + random + '</section>'
//2.把这两个元素追加到对应的父元素里面
//以前创建元素createElement，但是元素里面内容比较多，需要innerHTML复制在appendChild追加到父元素里面 这样是比较繁琐的
//现在有个高级做法：利用insertAdjacentHTML()可以直接把字符串元素添加到父元素中 afterbegin在元素内容的第一个子节点之前插入beforeend插入元素内容最后一个子节点
that.ul.insertAdjacentHTML('beforeend', li)
that.fsection.insertAdjacentHTML('beforeend', section)
that.init();
}
//3、删除功能
removeTab(e) {
//阻止冒泡 防止触发li的切换点击事件
e.stopPropagation();
//他的爸爸li有索引 所以index=他爸爸的索引parentNode.index
var index = this.parentNode.index
console.log(index);
//根据索引删除对应的li和section
that.lis[index].remove();
that.sections[index].remove();
//删除完要重新获取所有的元素
that.init();
//当我们删除的不是选中状态li的时候，原来的选中状态li保持不变 只有一个if不需要花括号
if (document.querySelector('.liactive')) return
//当我们删除了选中状态的这个li的时候，让它当前一个li处于选定状态
index--;
//手动调用我们的点击事件 不需要鼠标触发
that.lis[index] && that.lis[index].click()
}
//4、修改功能
editTab() {
// 此函数方法的this指向span
//一双就获取原先文本
var str = this.innerHTML;
//双击代码禁止选定文字
window.getSelection ? window.getSelection().removeAllRanges() : document.getSelection.empty()
console.log('双击了');
this.innerHTML = '<input type="text" />';
//input是他的第一个孩子
var input = this.children[0];
input.value = str
//让文本框里面的文字处于选定状态
input.select();
//当鼠标离开文本框（失去焦点）把文本框里面的值给span
input.onblur = function () {
//input的父亲的值parentNode.innerHTML===等于自己的值
this.parentNode.innerHTML = this.value
}
//当按下回车键的时候可以把文本框里面的值给span
input.onkeyup = function (e) {
if (e.keyCode === 13) {
//手动调用表单失去焦点事件 不需要鼠标离开操作
this.blur()
}
}
}
}
// 实例化tab对象 传给constructor接收
new Tab('#tab');
// 创建一个实例
// var tab = new Tab('#tab');
// 这样比较繁琐
// tab.init();