Java教程

放大镜效果

本文主要是介绍放大镜效果，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！ 
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            position: relative;
        }

        .small {
            position: relative;
            width: 200px;
            height: 200px;
            border: 1px solid #ccc;
            /* 测试 */
            margin-top: 201px;
            margin-left: 263px;
        }

        .small>img {
            width: 100%;
            height: 100%;
        }

        .big {
            display: none;
            position: absolute;
            left: 522px;
            top: 0;
            width: 400px;
            height: 400px;
            border: 1px solid #ccc;
            overflow: hidden;
        }

        .big>img {
            position: absolute;
            width: 800px;
            height: 800px;
        }

        .mask {
            display: none;
            position: absolute;
            left: 0;
            top: 0;
            width: 100px;
            height: 100px;
            background-color: orange;
            opacity: 0.5;
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="small">
            <img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.defanli.com%2Fi3%2F1637289231%2FO1CN01Ldp9fc2I3qkCMF8H5_%21%211637289231.jpg_q90.jpg&refer=http%3A%2F%2Fimg.defanli.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1644506916&t=6e9b0c11f89b561cccbfbeb74b76ae89"
                alt="">
            <div class="mask"></div>
        </div>
        <div class="big">
            <img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.defanli.com%2Fi3%2F1637289231%2FO1CN01Ldp9fc2I3qkCMF8H5_%21%211637289231.jpg_q90.jpg&refer=http%3A%2F%2Fimg.defanli.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1644506916&t=6e9b0c11f89b561cccbfbeb74b76ae89"
                alt="">
        </div>
    </div>
    <script src="./jquery-1.12.4.js"></script>
    <script>
        $(function () {
            const small = $('.small')
            const mask = $('.mask')
            const big = $('.big')

            small.hover(function () {
                mask.css("display", "block");
                big.css("display", "block");
            }, function () {
                mask.css("display", "none");
                big.css("display", "none");
            })

            small.on("mousemove", function (ev) {
                let x = ev.pageX - (small.offset().left - small.scrollLeft()) - mask.width() / 2
                let y = ev.pageY - (small.offset().top - small.scrollTop()) - mask.height() / 2
                if (x < 0) {
                    x = 0;
                }
                if (y < 0) {
                    y = 0;
                }
                if (x > small.width() - mask.width()) {
                    x = small.width() - mask.width();
                }
                if (y > small.height() - mask.height()) {
                    y = small.height() - mask.height();
                }
                mask.css({ left: x, top: y });
                // 放大倍数
                rateX = 4;
                $('.big>img').css({ left: -rateX * x, top: -rateX * y });
            })
        })
    </script>
</body>

</html>

 

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