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In CSS, you can use the opacity attribute to set the transparency of the image. The syntax is "opacity: value", where the value range is between "0.0-1.0"; when the value is 1, it means completely opaque, when the value is A value of 0.5 represents translucence, and a value of 0 represents complete transparency.
The operating environment of this tutorial: Windows7 system, CSS3&&HTML5 version, Dell G3 computer.
Picture transparency setting
.opacity img{opacity: 0.5;}
The code and effect pictures are as follows.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> body { background:url(../images/bg.jpg) no-repeat; } .opacitybox{ width: 400px; height: 200px; margin:0 auto; margin-top:320px; } .opacity img{ opacity: 0.5; } </style> </head> <body> <div class= "opacitybox opacity"> <img src="../images/img.jpg" alt="" width="100%"> </div> </body> </html>
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