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- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>放大框</title>
- <style>
- .one{
- position:relative;
- width:500px;
- height:500px;
- margin:0 auto;
- background-color:gold;
- }
- .twoo{
- position:absolute;
- top:0;
- left:0;
- width:200px;
- height:200px;
- background-color:rgba(100,100,100,.4);//字不会有透明效果。
- /* opacity:0.8; *///字有透明效果。
- }
-
-
- </style>
- </head>
- <body>
- <div class='one'>
- <div class='twoo'>222</div>
- </div>
- <script>
- const one=document.querySelector('.one');
- const twoo=document.querySelector('.twoo');
- twoo.addEventListener('mousedown',function(e){
- document.addEventListener('mousemove',move);
- function move(e){
- var x=e.pageX-one.offsetLeft;
- var y=e.pageY-one.offsetTop;
- twoo.style.top=y-(twoo.offsetHeight/2)+'px';
- twoo.style.left=x-(twoo.offsetWidth/2)+'px';
- console.log( twoo.style.top,twoo.style.left);
- if(x-(twoo.offsetWidth/2)<0){
- twoo.style.left=0+'px';
- }
- else if(x-(twoo.offsetWidth) >=one.offsetWidth-twoo.offsetWidth){
- twoo.style.left=one.offsetWidth-twoo.offsetWidth+'px';
- }
- if(y-(twoo.offsetHeight/2)<0){
- twoo.style.top=0;
- }
- else if(y-(twoo.offsetHeight)>=one.offsetHeight-twoo.offsetHeight){
- twoo.style.top=one.offsetHeight-twoo.offsetHeight+'px';
- }
- console.log(one.offsetWidth-twoo.offsetWidth+'px');
- };
- document.addEventListener('mouseup',function(){
- document.removeEventListener('mousemove',move);
- });
- });
-
- </script>
- </body>
- </html>
复制代码
本帖最后由 ba21 于 2022-4-6 15:51 编辑
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>放大框</title>
- <style>
- .one{
- position:relative;
- width:500px;
- height:500px;
- margin:0 auto;
- background-color:gold;
- }
- .twoo{
- position:absolute;
- top:0;
- left:0;
- width:200px;
- height:200px;
- background-color:rgba(100,100,100,.4);//字不会有透明效果。
- /* opacity:0.8; *///字有透明效果。
- }
-
-
- </style>
- </head>
- <body>
- <div class='one'>
- <div class='twoo'>222</div>
- </div>
- <script>
- const one=document.querySelector('.one');
- const twoo=document.querySelector('.twoo');
- twoo.addEventListener('mousedown',function(e){
- document.addEventListener('mousemove',move);
- function move(e){
- var x=e.pageX-one.offsetLeft;
- var y=e.pageY-one.offsetTop;
- twoo.style.top=y-(twoo.offsetHeight/2)+'px';
- twoo.style.left=x-(twoo.offsetWidth/2)+'px';
- if(x-(twoo.offsetWidth/2)<0){
- twoo.style.left=0+'px';
- }
- if(x-(twoo.offsetWidth/2) >=one.offsetWidth-twoo.offsetWidth){
- twoo.style.left=one.offsetWidth-twoo.offsetWidth+'px';
- }
-
- if(y-(twoo.offsetHeight/2)<0){
- twoo.style.top=0+'px';
- }
- if(y-(twoo.offsetHeight/2)>=one.offsetHeight-twoo.offsetHeight){
- twoo.style.top=one.offsetHeight-twoo.offsetHeight+'px';
- }
- };
- document.addEventListener('mouseup',function(){
- document.removeEventListener('mousemove',move);
- });
- });
-
- </script>
- </body>
- </html>
复制代码
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