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<!DOCTYPE html> <html> <head> <style> .mask1 { mask: url(/i/logo/w3.png) no-repeat 50% 50%; } </style> </head> <body> <h1>mask 属性</h1> <h3>带有遮罩层的图像：</h3> <div class="mask1"> <img src="/i/photo/beijing.jpg" alt="Beijing" width="600" height="400"> </div> <h3>Original image:</h3> <img src="/i/photo/beijing.jpg" alt="Beijing" width="600" height="400"> </body> </html>