動畫封裝小案例

forhusa---發表於2017-11-26
動畫封裝
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        .box {
            width: 490px;
            height: 170px;
            padding: 5px;
            border: 1px solid #ccc;
            margin: 100px auto;
        }
        .inner {
            width: 490px;
            height: 170px;
            position: relative;
            overflow: hidden;
        }
        ul {
            width: 500%;
            list-style: none;
            position: absolute;
            left: 0;
        }
        li {
            float: left;
        }
        .square {
            position: absolute;
            bottom: 10px;
            right: 10px;
        }
        span {
            display: inline-block;
            width: 16px;
            height: 16px;
            background-color: #fff;
            text-align: center;
            margin: 3px;
            border: 1px solid #ccc;
            line-height: 16px;
            cursor: pointer;
        }
        .current {
            background-color: darkorange;
            color: #fff;
        }
    </style>
    <script>
        window.onload=function()
        {
            var inner = document.getElementById("inner");
            var imgWidth = inner.offsetWidth;
            var ul = inner.children[0];
            var spanArr = inner.children[1].children;
            for (var i = 0; i < spanArr.length; i++) {
                spanArr[i].index = i;
                spanArr[i].onmouseover = function () {
                    for (var j = 0; j < spanArr.length; j++) {
                        spanArr[j].className = "";
                    }
                    this.className = "current";
                    animate(ul, -this.index * imgWidth);
                }
            }
            function animate(ele, target) {
                clearInterval(ele.timer);
                var speed = target > ele.offsetLeft ? 10 : -10;
                ele.timer = setInterval(function () {
                    var val = target - ele.offsetLeft;
                    ele.style.left = ele.offsetLeft + speed + "px";
                    if (Math.abs(val) < Math.abs(speed)) {
                        ele.style.left = target + "px";
                        clearInterval(ele.timer);
                    }
                }, 30)
            }
        }
    </script>
</head>
<body>
<div class="box">
    <div class="inner" id="inner">
        <ul>
            <li><img src="images/01.jpg" alt=""/></li>
            <li><img src="images/02.jpg" alt=""/></li>
            <li><img src="images/03.jpg" alt=""/></li>
            <li><img src="images/04.jpg" alt=""/></li>
            <li><img src="images/05.jpg" alt=""/></li>
        </ul>
        <div class="square">
            <span class="current">1</span>
            <span>2</span>
            <span>3</span>
            <span>4</span>
            <span>5</span>
        </div>
    </div>
</div>



</body>
</html>

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