文登百度微信小程序_JS完成扩大镜效果

阅读  ·  发布日期 2021-01-05 10:50  ·  admin
JS实现放大镜效果       这篇文章主要为大家详细介绍了JS实现放大镜效果,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

JS实现放大镜效果,供大家参考,具体内容如下

鼠标移到图片上就可以放大一块区域

代码:

 !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 
 #small{
 width: 700px;
 height: 340px;
 position: absolute;
 left: 70px;
 top: 100px;
 #small img{
 width: 100%;
 height: 100%;
 #mark{
 width: 200px;
 height: 200px;
 background-color:white;
 position: absolute;
 opacity: 0.5;
 filter: alpha(opacity=50);
 left: 0px;
 top: 0px;
 display: none;
 #big{
 width: 400px;
 height: 400px;
 border: 1px solid black;
 left: 800px;
 top: 100px;
 position: absolute;
 overflow: hidden;
 display: none;
 #big img{
 width: 1400px;
 height: 680px;
 position: absolute;
 left: 0px;
 top: 0px;
 /style 
 script 
 window.onload = function(){
 var oSmall = document.getElementById("small");
 var oBig = document.getElementById("big");
 var oMark = document.getElementById("mark");
 var oBigImg = oBig.getElementsByTagName("img")[0];
 oSmall.onmouseover = function(){
 oMark.style.display = "block";
 oBig.style.display = "block";
 oSmall.onmouseout = function(){
 oMark.style.display = "none";
 oBig.style.display = "none";
 oSmall.onmousemove = function(ev){
 var e = ev || window.event;
 var l = e.clientX - oSmall.offsetLeft - 100;
 if(l = 0){
 l = 0;
 if(l = (700-200)){
 l = 500;
 var t = e.clientY - oSmall.offsetTop - 100;
 if(t = 0){
 t = 0;
 if(t = (340-200)){
 t = 140;
 oMark.style.left = l + 'px';
 oMark.style.top = t + 'px';
 /* 右边图片移动方向与左边图片方向相反且成倍数移动 */
 oBigImg.style.left = l * -2 + 'px';
 oBigImg.style.top = t * -2 + 'px';
 /script 
 /head 
 body 
 div id="small" 
 img src="地狱之门卫士 加里奥.jpg" alt="怎么回事" 
 div id="mark" /div 
 /div 
 div id="big" 
 img src="地狱之门卫士 加里奥.jpg" alt="怎么回事" 
 /div 
 /body 
 /html 

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凡科。