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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <h1>picture 元素</h1> <p>调整浏览器窗口大小可加载不同的图像。</p> <picture> <source media="(min-width:650px)" srcset="/i/photo/flower-2.jpg"> <source media="(min-width:465px)" srcset="/i/photo/flower-4.jpg"> <img src="/i/photo/flower.gif" alt="Flowers" style="width:auto;"> </picture> </body> </html>