How to use Layui to achieve picture magnifying glass effect-JS Tutorial-php.cn

How to use Layui to achieve picture magnifying glass effect

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Release： 2023-10-25 10:07:50

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How to use Layui to achieve picture magnifying glass effect

How to use Layui to achieve the picture magnifying glass effect

Introduction:
In web design, the picture magnifying glass effect is a common and practical function. It allows users to enlarge the picture and display details when the mouse hovers or clicks on the picture, providing a better user experience. This article will introduce how to use Layui to achieve the picture magnifying glass effect, and provide specific code examples to help readers easily implement this function.

Steps:

Introduce Layui and related dependent libraries
First, we need to introduce Layui’s related resource files into the page. You can download the latest version of Layui from the official Layui website and introduce its related resources into the HTML file. In addition, in order to achieve the picture magnifying glass effect, it is also necessary to introduce jquery, layer and other library files.

<head>
    <link rel="stylesheet" href="layui/css/layui.css">
    <script src="jquery/jquery.min.js"></script>
    <script src="layui/layui.js"></script>
    <script src="layer/layer.js"></script>
</head>

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Writing HTML structure
In HTML, we need to create a container containing images and set a unique id for it to operate on it in subsequent code element.

<body>
    <div id="image-container">
        <img src="image.jpg" alt="图片" id="image">
        <div id="zoom-box"></div>
    </div>
</body>

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Writing CSS styles
In order to achieve the magnifying glass effect, we need to set a certain width and height for the image container, and set its position attribute to relative. Also, create a mask layer for the magnifying glass and style it accordingly.

#image-container {
    position: relative;
    width: 500px;
    height: 500px;
}

#zoom-box {
    position: absolute;
    top: 0;
    left: 100%;
    width: 200px;
    height: 200px;
    background-color: #fff;
    opacity: 0.5;
    border: 1px solid #ccc;
    display: none;
}

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Initialize Layui and write JavaScript code
In JavaScript, we need to use Layui's event listening function to achieve the effect of mouse hovering and leaving. By setting the position of the magnifying glass and the offset of the picture when the mouse is moved, the effect of the picture magnifying glass is achieved.

layui.use('layer', function() {
    var layer = layui.layer;
    var zoom = $('#zoom-box'); // 获取放大镜元素
    var image = $('#image'); // 获取图片元素

    $('#image-container').hover(
        function() { // 鼠标悬停事件
            zoom.show();
            layer.tips('<img src=' + image.attr('src') + ' alt="放大图片"/>', '#zoom-box', {
                tips: [2, '#fff']
            });
        },
        function() { // 鼠标离开事件
            zoom.hide();
            layer.closeAll('tips');
        }
    ).mousemove(
        function(event) { // 鼠标移动事件
            var x = event.pageX - $(this).offset().left - zoom.width()/2;
            var y = event.pageY - $(this).offset().top - zoom.height()/2;

            // 控制放大镜位置和图片偏移
            if (x < 0) {
                x = 0;
            }
            if (y < 0) {
                y = 0;
            }
            if (x > $(this).width() - zoom.width()) {
                x = $(this).width() - zoom.width();
            }
            if (y > $(this).height() - zoom.height()) {
                y = $(this).height() - zoom.height();
            }

            zoom.css({
                left: x,
                top: y
            });

            image.css({
                marginLeft: -2*x,
                marginTop: -2*y
            });
        }
    );
});

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The above are the specific steps and code examples for using Layui to achieve the picture magnifying glass effect. It should be noted that in order to implement this function, we also need to introduce Layui's layer library to display enlarged images. Through simple CSS styles, HTML structures and JavaScript codes, we can implement a simple image magnifying glass effect and use Layui's layer component to display the enlarged image. Readers can further customize the style and functionality according to their own needs.

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