js仿淘宝放大镜效果
仿淘宝放大镜封装效果，供大家参考，具体内容如下
放大镜是做好了，但是没有下面小型导航无法选择放大图片，后期我会在封装出来的。由于考试当前 考完试我会在推出vue的放大效果。以下是代码：
1.html代码
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>Title</title> <link href='https://www.haobala.com/bcjs/css/index.css' rel='stylesheet'></head><body><div class='magnify'> <div class='magnify_conatiner'> <div class='magnify_preview'> <img src='https://www.haobala.com/image/1.jpg' alt=''> <div class='magnif_mask'></div> <div class='margnif_big'> <img src='https://www.haobala.com/image/1.jpg' alt=''> </div> </div> </div></div></div><script src='https://www.haobala.com/bcjs/js/index.js'></script><script> var list = { BackgroundColor:’red’,//遮罩层 颜色 必填 Opacity:0.2,//遮罩层透明度 随意 size:1.5 //放大倍数 必填 } init(list) </script></body></html>
2.css代码
.magnify_conatiner { width: 500px; height: 500px; margin: 50px 50px;}.magnify_conatiner .magnify_preview { position: relative; height: 400px; border: 1px silver solid; background-color: red;}div.magnify_preview .sizeimg { height: 100%; width: 100%;}.magnify_conatiner .magnify_preview .magnif_mask{ position: absolute; top: 0; left: 0; opacity: .5; border: 1px solid #ccc; cursor: move; display: none;}.margnif_big{ position: absolute; display: none; top: 0px; left: 501px; width: 450px; height: 450px; z-index: 999; border: 1px solid #ccc; overflow: hidden;}.margnif_big img{ position: absolute; top: 0; left: 0;}
3.封装的 js代码
function init(obj) { if (obj.BackgroundColor && obj.size) { var maskBigColor = obj.BackgroundColor var maskSize = obj.size var maskOpacity = obj.Opacity if(maskOpacity === undefined){ maskOpacity = 0.2 } var magnify_preview = document.querySelector(’.magnify_preview’) var mask = document.querySelector(’.magnif_mask’) var big = document.querySelector(’.margnif_big’) var bigIMG = document.querySelector(’.bigImg’) mask.style.height = obj.size * 100 + ’px’ mask.style.width = obj.size * 100 + ’px’ mask.style.backgroundColor = obj.BackgroundColor mask.style.opacity = maskOpacity magnify_preview.addEventListener(’mouseover’, function () { mask.style.display = ’block’ big.style.display = ’block’ }) magnify_preview.addEventListener(’mouseout’, function () { mask.style.display = ’none’ big.style.display = ’none’ }) magnify_preview.addEventListener(’mousemove’, function (e) { var x = e.pageX - this.offsetLeft var y = e.pageY - this.offsetTop var maskX = x - mask.offsetWidth / 2 var maskY = y - mask.offsetHeight / 2 var magnify_previewX = magnify_preview.offsetWidth var magnify_previewY = magnify_preview.offsetHeight var maskMaxX = magnify_preview.offsetWidth - mask.offsetWidth var maskMaxY = magnify_preview.offsetHeight - mask.offsetHeight if (maskX <= 0) { maskX = 0 } else if (maskX >= magnify_previewX - mask.offsetWidth) { maskX = magnify_previewX - mask.offsetWidth } if (maskY <= 0) { maskY = 0 } else if (maskY >= magnify_previewY - mask.offsetHeight) { maskY = magnify_previewY - mask.offsetHeight } mask.style.left = maskX + ’px’ mask.style.top = maskY + ’px’//大图片的移动距离 = 遮挡层的移动距离*大图片最大移动距离 / 遮挡层最大移动距离 var bigMaxX = bigIMG.offsetWidth - big.offsetWidth var bigImgY = bigIMG.offsetHeight - big.offsetHeight var bigX = maskX * bigMaxX / maskMaxX var bigY = maskY * bigImgY / maskMaxY bigIMG.style.left = - bigX + ’px’ bigIMG.style.top = - bigY + ’px’ }) } else { console.log(’error’) }}
后期考完试我会继续的，图片大家自己更改吧，我没有用网图
效果展示
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。
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