js 淡入淡出的tab选项卡

时间：2023-03-09 13:26:18
js 淡入淡出的tab选项卡

js 淡入淡出的tab选项卡

代码如下





<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <title></title>

</head>

<style>

    body {font-family: "Lato", sans-serif;}

    /* Style the tab */

    div.tab {

        overflow: hidden;

        border: 1px solid #ccc;

        background-color: #f1f1f1;

    }

    /* Style the buttons inside the tab */

    div.tab button {

        background-color: inherit;

        float: left;

        border: none;

        outline: none;

        cursor: pointer;

        padding: 14px 16px;

        transition: 0.3s;

        font-size: 17px;

    }

    /* Change background color of buttons on hover */

    div.tab button:hover {

        background-color: #ddd;

    }

    /* Create an active/current tablink class */

    div.tab button.active {

        background-color: #ccc;

    }

    /* Style the tab content */

    /*.tabcontent {*/

        /*display: none;*/

        /*padding: 6px 12px;*/

        /*border: 1px solid #ccc;*/

        /*border-top: none;*/

    /*}*/

    /* Style the tab content */

    .tabcontent {

        display: none;

        padding: 6px 12px;

        -webkit-animation: fadeEffect 1s;

        animation: fadeEffect 1s;

    }

    /* Fade in tabs */

    @-webkit-keyframes fadeEffect {

        from {opacity: 0;}

        to {opacity: 1;}

    }

    @keyframes fadeEffect {

        from {opacity: 0;}

        to {opacity: 1;}

    }

</style>

<body>

<p>点击各个选项卡查看内容:</p>

<div class="tab">

    <button id="defaultOpen" class="tablinks" onclick="openCity(event, 'London')">London</button>

    <button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>

    <button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>

</div>

<div id="London" class="tabcontent">

    <h3>London</h3>

    <p>London is the capital city of England.</p>

</div>

<div id="Paris" class="tabcontent">

    <h3>Paris</h3>

    <p>Paris is the capital of France.</p>

</div>

<div id="Tokyo" class="tabcontent">

    <h3>Tokyo</h3>

    <p>Tokyo is the capital of Japan.</p>

</div>

</body>

</html>

<script>

    function openCity(evt, cityName) {

        var i, tabcontent, tablinks;

        //所有tab-content移除block效果，tab-links先移除active。

        tabcontent = document.getElementsByClassName("tabcontent");

        for (i = 0; i < tabcontent.length; i++) {

            tabcontent[i].style.display = "none";

        }

        tablinks = document.getElementsByClassName("tablinks");

        for (i = 0; i < tablinks.length; i++) {

            tablinks[i].className = tablinks[i].className.replace(" active", "");

        }

        //根据字符串把对应的tab-content和tab-links加上效果。

        document.getElementById(cityName).style.display = "block";

        evt.currentTarget.className += " active";

//        tabcontent[i].style.display = "none";

    }

    // 触发 id="defaultOpen" click 事件,默认让第I一个tabcontent显示。

    document.getElementById("defaultOpen").click();

//    var tabcontent = document.getElementsByClassName("tabcontent");

//    tabcontent[0].style.display = "block";

//

//    var tablinks = document.getElementsByClassName("tablinks");

//    tablinks[0].className += " active";

</script>






 




二.淡入弹出效果


如果要淡入弹出的动画效果。则把上面的tabcontent样式加上animation属性。并加上动画的效果fadeEffect定义。


/* Style the tab content */
.tabcontent {
    display: none;
    padding: 6px 12px;
    -webkit-animation: fadeEffect 1s;
    animation: fadeEffect 1s;
}

/* Fade in tabs */
@-webkit-keyframes fadeEffect {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes fadeEffect {
    from {opacity: 0;}
    to {opacity: 1;}
}
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