實現功能
切換，添加，刪除，修改
代碼
HTML代碼
<!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>面向對象 Tab</title>
<link rel="stylesheet" href="./styles/tab.css">
<link rel="stylesheet" href="./styles/style.css">
</head>
<body>
<main>
<h4>
Js 面向對象 動態添加標籤頁
</h4>
<div class="tabsbox" id="tab">
<!-- tab 標籤 -->
<nav class="fisrstnav">
<ul>
<li class="liactive"><span>測試1</span><span class="iconfont icon-guanbi"></span></li>
<li><span>測試2</span><span class="iconfont icon-guanbi"></span></li>
<li><span>測試3</span><span class="iconfont icon-guanbi"></span></li>
</ul>
<div class="tabadd">
<span>+</span>
</div>
</nav>
<!-- tab 內容 -->
<div class="tabscon">
<section class="conactive">測試1</section>
<section>測試2</section>
<section>測試3</section>
</div>
</div>
</main>
<script src="js/tab.js"></script>
</body>
</html>
CSS代碼
* {
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;
}
@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代碼
/* jshint esversion: 6 */
var that;
class Tab {
constructor(id) {
// 獲取元素
that = this;
this.main = document.querySelector(id);
this.add = this.main.querySelector('.tabadd');
// li的父元素
this.ul = this.main.querySelector('.fisrstnav ul:first-child');
// section 父元素
this.fsection = this.main.querySelector('.tabscon');
this.init();
}
init() {
this.updateNode();
// init 初始化操作讓相關的元素綁定事件
this.add.onclick = this.addTab;
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].index = i;
this.lis[i].onclick = this.toggleTab;
this.remove[i].onclick = this.removeTab;
this.spans[i].ondblclick = this.editTab;
this.sections[i].ondblclick = this.editTab;
}
}
// 因爲我們動態添加元素 需要從新獲取對應的元素
updateNode() {
this.lis = this.main.querySelectorAll('li');
this.sections = this.main.querySelectorAll('section');
this.remove = this.main.querySelectorAll('.icon-guanbi');
this.spans = this.main.querySelectorAll('.fisrstnav li span:first-child');
}
// 1. 切換功能
toggleTab() {
// console.log(this.index);
that.clearClass();
//className 屬性設置或返回元素的 class 屬性。
this.className = 'liactive';
that.sections[this.index].className = 'conactive';
}
// 清除所有li 和section 的類
clearClass() {
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].className = '';
this.sections[i].className = '';
}
}
// 2. 添加功能
addTab() {
that.clearClass();
// (1) 創建li元素和section元素
var random = Math.random();
var li = '<li class="liactive"><span>新選項卡</span><span class="iconfont icon-guanbi"></span></li>';
var section = '<section class="conactive">測試 ' + random + '</section>';
// (2) 把這兩個元素追加到對應的父元素裏面
that.ul.insertAdjacentHTML('beforeend', li);
that.fsection.insertAdjacentHTML('beforeend', section);
that.init();
}
// 3. 刪除功能
removeTab(e) {
e.stopPropagation(); // 阻止冒泡 防止觸發li 的切換點擊事件
var index = this.parentNode.index;
console.log(index);
// 根據索引號刪除對應的li 和section remove()方法可以直接刪除指定的元素
that.lis[index].remove();
that.sections[index].remove();
that.init();
// 當我們刪除的不是選中狀態的li 的時候,原來的選中狀態li保持不變
if (document.querySelector('.liactive')) return;
// 當我們刪除了選中狀態的這個li 的時候, 讓它的前一個li 處於選定狀態
index--;
// 手動調用我們的點擊事件 不需要鼠標觸發
that.lis[index] && that.lis[index].click();
}
// 4. 修改功能
editTab() {
var str = this.innerHTML;
// 雙擊禁止選定文字
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
// alert(11);
this.innerHTML = '<input type="text" />';
var input = this.children[0];
input.value = str;
input.select(); // 文本框裏面的文字處於選定狀態
// 當我們離開文本框就把文本框裏面的值給span
input.onblur = function() {
this.parentNode.innerHTML = this.value;
};
// 按下回車也可以把文本框裏面的值給span
input.onkeyup = function(e) {
if (e.keyCode === 13) {
// 手動調用表單失去焦點事件 不需要鼠標離開操作
this.blur();
}
}
}
}
new Tab('#tab');
拓展
將字符串加入到元素中
除了先creatElement，將內容通過innerHTML添加到新創建的元素，再通過appendChild加入到父親中;還可以通過insertAdjacentHTML(position,text)方法進行添加，position屬性的值可以有四種：
①’beforebegin’：元素自身的前面
②’afterbegin’：插入元素內部的第一個子節點之前
③’beforeend’：插入元素內部的最後一個子節點之後
④’afterend’：元素自身的後面
計算ul裏的li個數可以使用屬性childElementCount
remove()方法可以直接刪除指定的元素
click()方法可以自動調用點擊事件，不需要鼠標觸發，雙擊事件用：ondblclick，對象失去焦點事件：onblur，自動調用可用blur()方法
雙禁止選中功能
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
插入頁面元素
that.ul.insertAdjacentHTML('beforeend', li);
學習愉快! 😃