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<!DOCTYPE html> <html> <head> <style> input:read-write { background-color: beige; border: 2px solid maroon; } </style> </head> <body> <h1>:read-write 演示</h1> <p>:read-write 选择器选择没有 "readonly" 属性的表单元素：</p> <form> <label for="name">姓名：</label><br> <input id="name" name="name" type="text" /><br> <label for="email">邮箱：</label><br> <input id="email" name="email" type="email" /><br> <label for="country">国家：</label><br> <input id="country" name="country" type="text" value="中国" readonly /> </form> </body> </html>