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<!DOCTYPE html> <html> <head> <style> .div1 { border: 1px solid black; height: 120px; width: 150px; background: url(/demo/images/img_flwr.gif); background-repeat: no-repeat; background-size: contain; } .div2 { border: 1px solid black; height: 120px; width: 150px; background: url(/demo/images/img_flwr.gif); background-repeat: no-repeat; background-size: cover; } .div3 { border: 1px solid black; height: 120px; width: 150px; background: url(/demo/images/img_flwr.gif); background-repeat: no-repeat; } </style> </head> <body> <h1>background-size 属性</h1> <h2>background-size: contain:</h2> <div class="div1"> <p>Lorem ipsum dolor sit amet.</p> </div> <h2>background-size: cover:</h2> <div class="div2"> <p>Lorem ipsum dolor sit amet.</p> </div> <h2>没有定义 background-size：</h2> <div class="div3"> <p>Lorem ipsum dolor sit amet.</p> </div> <p>原始图像：</p> <img src="/demo/images/img_flwr.gif" alt="鲜花" width="224" height="162"> </body> </html>