案例说明
案例分析
实现案例代码
style.css
@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,d09GMgABAAAAAAK4AAsAAAAABmwAAAJrAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHEIGVgCCcAp4fwE2AiQDCAsGAAQgBYRtBzAbpQXIrrApw71oi3CCOyzEy8RvE4yIN8TD036/zp03qCYRjaJZNBFFS/gREoRGipQKofjuNrb 9XbTqrmXcqWzfTRDqFqWkhAJzYToaE6LQ7Q30CirRqSKMnj58DdIdrNAdhoTQJa5VGfLrtiAy lPoAcZdUC57UljTR4TMAo4oL0xiqwYG8YueIHPCdTqYajty/t bUpmrwvEnUK42lQhLMssVy1UNhzN4kmF6vSQVvMY/T5 HEU1SUXBbti7uBBrx cgqJULp0GhAgBna5AgSkgE0eN6R1NwTitNt0yAI5VG7wr/8AljmoX7K zq tBF1Q8k9JTPWp1AjnJDgCzmM3bU0V31dsvV3M2eC6fHjaGfX/qS7U5Gr58vj6uD0bgxudyrV/OtHHyP NZnpO1txbktjdY 3FB61 7nxeOzq8niGYnRwT3v3aZxeXf6rrNxl5//49WlEtZUUL1Pj3Bv1EO7MuG2namrCkbvcnApLUJtWpRhv2tzlRLx43kQ7WO2/FW6c5QqDZEZnYKFeosoVK1NdSa5E/XaVM1Ra7BhAEQmk0kjV5QaLbIzG5U6HRRqTkK1DqJtivrjMT1zJaNnIsihAiyQE3JdbszcW0Xiadzdl4d8UO0HSUGNDNXzl2hifYSO5pPjrorgdjUAAavoa5TKDZVUXD3kuuOOzh70fShvUiN2owtNsRxIREIIiATUCYpGO2aqXy/CxEeHcfuaKrLDiGbQ5kcEMsNIK8M5qCmR3mn8RFHOpcECBtlAAwWIZ2OAqV5kQoJXHvShORYBzrDZKhhb3uT8QPlrA3bmsKZV6i89DiTV2o1AAAA') 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-famly: "iconfont" !important;
font-size: 16px;
font-style: normal;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.icon-guanbi:before {
content: "\e676";
}
tab.css
* {
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;
}
index.html
<!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="js/tab1.js"></script> </body> </html>
tab.js文件 后期编辑将that 修改了，利用bind()使代码更加优雅
// **var that;**
class Tab {
constructor(id) {
// 获取元素
// **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的父元素
this.fsection = this.main.querySelector('.tabscon');
this.init();
}
init() {
this.updateNode();
// init初始化操作，让相关元素绑定事件
this.add.onclick = this.addTab.bind(this.add, this);
for (var i = 0; i < this.lis.length; i++) {
this.lis[i].index = i;
this.lis[i].onclick = this.toggleTab.bind(this.lis[i], this);
//this.lis[i]是本身的,this是constructlor
this.remove[i].onclick = this.removeTab.bind(this.remove[i], this);
// ondblclick双击选中
this.spans[i].ondblclick = this.editTab;
this.sections[i].ondblclick = this.editTab;
}
}
// 获取所有的li和section 以及删除按钮
// 因为我们动态添加元素，需要重新获取对应的元素
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.切换功能
toggleTab(that) {
// console.log(this.index);
that.clearClass();
this.className = 'liactive';
that.sections[this.index].className = 'conactive';
}
// 清除所有li和section
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) {
that.clearClass();
// 1.创建li元素和section元素
var random = Math.random();
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
that.ul.insertAdjacentHTML('beforeend', li);
that.fsection.insertAdjacentHTML('beforeend', section);
that.init();
}
// 3.删除功能
removeTab(that, e) {
e.stopPropagation(); //阻止冒泡，防止触发li的点击切换事件
var index = this.parentNode.index;
console.log(index);
// 根据索引号删除对应的li 和section remove()方法可以直接删除指定的元素
that.lis[index].remove();
that.sections[index].remove();
that.init();
// 当我们删除的不是选中状态的li 的时候，原来选中状态li保持不变,return后面的代码不执行
if (document.querySelector('.liactive')) return;
// 当我们删除了选中状态的这个li 的时候，让它的前一个li 处于选定状态
index--;
// 自动调用我们的点击事件 不需要鼠标触发
that.lis[index] && that.lis[index].click(); //前面为真(有li)在调用
}
// 4.修改功能
editTab() {
// 文本框有原来的文本框内容
var str = this.innerHTML;
// 双击禁止选定文字
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
this.innerHTML = '<input type="text"/>';
var input = this.children[0];
input.value = str;
input.select(); //文本框里面文字处于选定状态
// 当我们离开文本框就把文本框里面的值给span
input.onblur = function() {
this.parentNode.innerHTML = this.value;
};
// 按下回车键也可以把文本框内容值给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();
}
}
}
}
new Tab("#tab");