How to set transparency? Define the opacity attribute. By setting this attribute, any element can be made semi-transparent. The basic syntax of the opacity attribute is as follows:
Take Value description:
1.
2. Inherit means inheritance, that is, inheriting the opacity of the parent element.
3. For IE browser, you can use its private attribute filter to be compatible: filter: alpha (alpha=value);.
Example: Designing light box advertising background cloth
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>opacity</title> <style type="text/css"> body { margin:0; padding:0; } p { position:absolute; } .bg { width:100%; height:100%; background:#000; opacity:0.7; filter:alpha(opacity=70); } .lightbox { left:50px; top:50px; } </style> </head> <body> <p class="web"><img src="images/web_bg_9.jpg" style="max-width:90%" style="max-width:90%" / alt="Complete code to implement CSS3 opacity" ></p> <p class="bg"></p> <p class="lightbox"><img src="images/web_bg_10.png" style="max-width:90%" / alt="Complete code to implement CSS3 opacity" ></p> </body>
Demonstration renderings:
Related articles:
CSS sets an element to be translucent
CSS3 Tutorial (8): CSS3 Transparency Guide
Used in CSS3 Example of adjusting transparency using RGBa
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