面向对象 Tab案例

HTML部分

                                          
         
             Js 面向对象 动态添加标签页         
         
                                                     
                 
测试1
                 
测试2
                 
测试3
             
         
     
         

@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-family: "iconfont" !important;   font-size: 16px;   font-style: normal;   -webkit-font-smoothing: antialiased;   -moz-osx-font-smoothing: grayscale; }  .icon-guanbi:before {   content: "\e676"; }  

CSS样式

* {     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 sectionconactive {
    display: none;
    width: 100%;
    height: 100%;
}

.tabscon section.conactive {
    display: block;
}

JS部分 

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 父元素
        this.fsection = this.main.querySelector('.tabscon');
        this.init();
    }
    init() {
            this.updateNode();
            // init 初始化操作让相关的元素绑定事件
            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;

            }
        }
        // 因为我们动态添加元素 需要从新获取对应的元素
    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() {
            // console.log(this.index);
            that.clearClass();
            this.className = 'liactive';
            that.sections[this.index].className = 'conactive';
        }
        // 清除所有li 和section 的类
    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) 创建li元素和section元素 
            var random = Math.random();
            var li = '
新选项卡
';
            var section = '
测试 ' + random + '
';
            // (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(e) {
            e.stopPropagation(); // 阻止冒泡 防止触发li 的切换点击事件
            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,原来的选中状态li保持不变
            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--;
            // 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() {
        var str = this.innerHTML;
        // 双击禁止选定文字
        window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
        // alert(11);
        this.innerHTML = '';
        var input = this.children[0];
        input.value = str;
        input.select(); // 文本框里面的文字处于选定状态
        // 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;
        };
        // 按下回车也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();
            }
        }
    }

}
new Tab('#tab');