菜单切换
FACESOHO知行者
心灵
记录
远方
赞赏工具
源代码:
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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta charset="UTF-8"> <title>小鸟启蒙(facesoho.com)</title> </head> <body> <picture> <source srcset="/public/uploads/image/20190120/img_flowers.jpg" media="(max-width:400px)"> <source srcset="/public/uploads/image/20190120/img_flowers.jpg"> <img src="/public/uploads/image/20190120/img_flowers.jpg" alt="Flowers" style="width:auto;"> </picture> <p>调整浏览器宽度和高度,背景在宽度小于 400px 时将改变。 </p> </body> </html>
运行结果