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<!DOCTYPE html> <html> <head> <style> img { filter: grayscale(50%); } </style> </head> <body> <h1>filter 过滤器属性</h1> <p>将图像转换为灰度：</p> <img src="pineapple.jpg" alt="菠萝" width="300" height="300"> <p><strong>注意：</strong>过滤器属性 filter 在 Edge 12 或 Internet Explorer 中不受支持。</p> </body> </html>