PretendType/slider-static-demo.html at master · Sheetaa/PretendType · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Slider Demo</title>
    <style>
        .slider {
            position: absolute;
            text-align: center;
        }
        .item {
            width: 300px;
            height: 450px;
            overflow: hidden;
        }
        .hide {
            display: none;
        }
        img {
            width: 300px;
            height: 450px;
        }
        .pager {

        }
        .pager a.pager-current {
            background: #333;
            /*width: 16px;*/
        }
        .pager a {
            background: #ccc;
            display: inline-block;
            cursor: pointer;
            width: 10px;
            height: 10px;
            border-radius: 5px;
        }
    </style>
</head>
<body>
    <div class="slider">
        <div class="item">
            <img src="http://pic.hefei.cc/newcms/2012/03/14/13316929284f6005808aa20.jpg">
        </div>
        <div class="item hide">
            <img src="http://pic.hefei.cc/newcms/2012/03/14/13316929274f60057f72733.jpg">
        </div>
        <div class="item hide">
            <img src="http://pic.hefei.cc/newcms/2012/03/14/13316929284f60058013da9.jpg">
        </div>
        <div class="item hide">
            <img src="http://pic.hefei.cc/newcms/2012/03/14/13316929294f600581a07e5.jpg">
        </div>
        <div class="pager">
            <a href="#" data-page="0" class="pager-current"></a>
            <a href="#" data-page="1"></a>
            <a href="#" data-page="2"></a>
            <a href="#" data-page="3"></a>
        </div>
    </div>
    <script>
        var slice = Array.prototype.slice;
        var sliderItems = slice.call(document.getElementsByClassName('item'), 0);
        var as = slice.call(document.getElementsByTagName('a'), 0);
        console.log(sliderItems);
        var tag = -1;
        setInterval(function(){
            tag = -1;
            for(var i = 0, len = sliderItems.length; i < len; i++){
                if(/hide/.test(sliderItems[i].className) == false){
                    tag = i;
                    break;
                }
            }

            change(tag, (tag + 1)%len);

        }, 3000);

        var pager = document.getElementsByClassName('pager')[0];
        pager.addEventListener('click', function(e){
            e.preventDefault();
            var target = e.target;
            var current = document.getElementsByClassName('pager-current')[0];
            if(target.tagName == 'A' && target.className !== 'pager-current'){
                change(current.dataset.page, target.dataset.page);
            }
        }, false);

        // 切换函数
        function change(current, target){
            sliderItems[current].className += ' hide';
            sliderItems[target].className = sliderItems[target].className.replace(/ hide/, '');
            as[current].className = as[current].className.replace(/pager-current/, '');
            as[target].className += 'pager-current';
        }
    </script>
</body>
</html>