Js 面向对象动态添加标签页
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2024-03-23 09:57:46
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效果图
直接上代码
<!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/style.css">
<style>
* {
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;
margin: 0 auto;
height: 400px;
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;
}
</style>
</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="js/tab.js"></script>
</body>
</html>
//抽象 class 类 Tad
// var that;
class Tab {
constructor(id) {
// that = this;
//获取元素 this 实例化对象
this.main = document.querySelector(id); //最大的id盒子
//获取加号
this.tabadd = this.main.querySelector('.tabadd');
//获取ul
this.ul = this.main.querySelector('.fisrstnav ul');
//获取section 父亲
this.tabscon = this.main.querySelector('.tabscon');
this.init();
}
updateNode() {
this.lis = this.main.querySelectorAll('li') //所有的li
this.sections = this.main.querySelectorAll('section'); //所有的section
//获取li所有的 第一个 span
this.spans = this.main.querySelectorAll('.fisrstnav li span:first-child')
}
//把事件专门放到方法里面 初始化 所有的事件
init() { //因为li有多个所以需要遍历所有的li
this.updateNode();
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].index = i; //遍历得出当前li里的值的索引
//li点击之后。toggleTab里面的函数需要两个 对象 实例对象 this 当前 li this
this.lis[i].onclick = this.toggleTab.bind(this, this.lis[i]); //this 实例对象
this.spans[i].ondblclick = this.editTab;
this.sections[i].ondblclick = this.editTab;
}
//点击加号
this.tabadd.onclick = this.addTadpole.bind(this);
}
//切换功能 方法方便调用
toggleTab(that) {
this.clearClass();
//让当前 li添加 liactive
that.className = 'liactive'
//让对应索引号的section添加conactive
this.sections[that.index].className = 'conactive'
}
//移除类名
clearClass() {
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].className = '';
this.sections[i].className = '';
}
}
//2增加 功能 addTab（）
addTadpole() {
this.clearClass();
//此时的this指向 + 按钮
//1 动态创建一个 li 然后插入父元素的 最后面
var li = '<li class="liactive"><span>测试xx</span><span class="iconfont icon-guanbi"></span></li>';
var section = ' <section class="conactive">测试xx</section>';
this.ul.insertAdjacentHTML('beforeend', li);
this.tabscon.insertAdjacentHTML('beforeend', section);
this.init();
}
//修改功能 editTab（）
//this指向span
editTab() {
var str = this.innerHTML; //保留原来的文字、
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
//1双击span里面生成input
this.innerHTML = '<input type="text" value=' + str + '>';
var input = this.children[0];
input.select(); //默认选中文本框里面的文字
//文本框失去焦点，把文本框里面的值给span 文本 框不要了
input.onblur = function () {
this.parentNode.innerHTML = this.value;
}
input.onkeydown = function (event) {
if (event.keyCodes == 13) {
//何不自动调用失去焦点事件
this.blur();
}
}
}
}
new Tab('#tab');
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