javaScript対象者向けトレーナー例——Tabバー切り替え

39113 ワード

先端

HTML部分

<!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>     Tab</title>
    <link rel="stylesheet" href="./styles/tab.css">
    <link rel="stylesheet" href="./styles/style.css">
</head>

<body>

    <main>
        <h4>
            Js             
        </h4>
        <div class="tabsbox" id="tab">
            <!-- tab    -->
            <nav class="fisrstnav">
                <ul>
                    <li class="liactive"><span>  1</span><span class="iconfont icon-guanbi"></span></li>
                    <li><span>  2</span><span class="iconfont icon-guanbi"></span></li>
                    <li><span>  3</span><span class="iconfont icon-guanbi"></span></li>
                </ul>
                <div class="tabadd">
                    <span>+</span>
                </div>
            </nav>

            <!-- tab    -->
            <div class="tabscon">
                <section class="conactive">  1</section>
                <section>  2</section>
                <section>  3</section>
            </div>
        </div>
    </main>
    
    <script src="js/tab.js"></script>
</body>

</html>

var that;
class Tab {
    constructor(id) {
        that = this;
        //     
        this.main = document.querySelector(id);
        this.add = this.main.querySelector('.tabadd');
        this.ul = this.main.querySelector('.fisrstnav ul:first-child');
        this.psection = this.main.querySelector('.tabscon');
        //    
        this.init()
    }

    //    
    init() {
        //     
        this.updateNode();
        //     
        this.add.onclick = this.addTab;
        for(var i = 0; i < this.lis.length; i++) {
            this.lis[i].index = i;
            this.lis[i].onclick = this.toggelTab;
            this.remove[i].onclick = this.removeTab;
            this.spans[i].ondblclick = this.editTab;
            this.sections[i].ondblclick = this.editTab;
        }
    }

    //       
    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');
    }

    //   
    toggelTab() {
        that.clearClassName();
        this.className = 'liactive';
        that.sections[this.index].className = 'conactive';
    }

    //     
    clearClassName() {
        for(var i = 0; i < this.lis.length; i++) {
            this.lis[i].className = '';
            this.sections[i].className = '';
        }
    }
    //   
    addTab() {
        //     
        that.clearClassName();
        //     
        var li = '    
';
        that.ul.insertAdjacentHTML('beforeend', li);
        var section = '      
';
        that.psection.insertAdjacentHTML('beforeend', section);
        //       
        that.init()
    }
    //   
    removeTab(e) {
        e.stopPropagation();
        var index = this.parentNode.index;
        that.lis[index].remove();
        that.sections[index].remove();
        //       
        that.init()
        //            li，     
        if(document.querySelector('.liactive')) {
            return;
        }
        index--;
        that.lis[index] && that.lis[index].click();
    }
    //   
    editTab() {
        //         
        window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
        var tabText = this.innerHTML;
        this.innerHTML = ''
        var input = this.children[0];
        input.value = tabText;
        input.select(); //     
        input.onblur = function() {
            this.parentNode.innerHTML = this.value;
        }
        input.onkeyup = function(e) {
            if(e.keyCode === 13) {
                this.blur();
            }
        }
    }
}

new Tab('#tab')

Tab.css部分

* {
    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;
}

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