CSS黑板效果示例程序
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>三十课-CSS黑板效果示例程序</title> <style> .chalkboard-effect { background-image: url(/u/201909/mysnvmktgl.jpg); background-size: cover; background-position: center; } @supports (filter: grayscale(1)) and (background-blend-mode: difference) { .chalkboard-effect { background-image: url(/u/201909/mysnvmktgl.jpg), url(/u/201909/mysnvmktgl.jpg); background-blend-mode: difference; background-position: calc(50% - 1px) calc(50% - 1px), calc(50% + 1px) calc(50% + 1px); filter: brightness(1.5) grayscale(1); } } </style> </head> <body> <div class="chalkboard-effect" style="width:680px;height:450px;max-width:100%;"></div> </body> </html>
运行结果
三十课
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