js题目9-优快云博客

本文链接：https://blog.youkuaiyun.com/2401_86997425/article/details/145680285

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF - 8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>图片放大镜效果</title>
    <style>
      
.magnifier-container {
    position: relative;
    display: inline-block;
}

.main-image {
    display: block;
    width: 300px;
    height: auto;
}

.magnifier {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 1px solid #000;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    pointer-events: none;
    display: none;
}

.zoom-image {
    position: absolute;
    left: 100%;
    top: 0;
    width: 300px;
    height: auto;
    display: none;
    transform: scale(3);
    transform-origin: top left;
}
    </style>
</head>

<body>
    <div class="magnifier-container">
        <img src="./static/300 1.webp" alt="示例图片" class="main-image">
        <div class="magnifier"></div>
        <img src="./static/300 1.webp" alt="放大图片" class="zoom-image">
    </div>
    <script>
      
const magnifierContainer = document.querySelector('.magnifier-container');
const mainImage = document.querySelector('.main-image');
const magnifier = document.querySelector('.magnifier');
const zoomImage = document.querySelector('.zoom-image');

magnifierContainer.addEventListener('mousemove', function (e) {
    const rect = mainImage.getBoundingClientRect();
    const x = e.clientX - rect.left;
    const y = e.clientY - rect.top;

    if (x >= 0 && x <= mainImage.width && y >= 0 && y <= mainImage.height) {
        magnifier.style.display = 'block';
        zoomImage.style.display = 'block';

        magnifier.style.left = x - magnifier.offsetWidth / 2 + 'px';
        magnifier.style.top = y - magnifier.offsetHeight / 2 + 'px';

        const bgX = -(x * zoomImage.offsetWidth / mainImage.width - magnifier.offsetWidth / 2) + 'px';
        const bgY = -(y * zoomImage.offsetHeight / mainImage.height - magnifier.offsetHeight / 2) + 'px';

        zoomImage.style.backgroundPosition = bgX + ' ' + bgY;
    } else {
        magnifier.style.display = 'none';
        zoomImage.style.display = 'none';
    }
});

    </script>
</body>

</html>

屏幕录制 2025-02-17 124845