如何用CSS实现自适应正方形
实现方式一: padding 设置百分比 是相对于父元素的
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>CSS</title> <style> .div2{ width: 50%; padding-bottom: 50%; background-color: pink; } </style> </head> <body> <div class="div2"></div> </body> </html>
实现方式二: 通过设置高度单位为 vw
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>CSS</title> <style> *{ margin: 0; padding: 0; } .div2{ width: 50%; height: 50vw; background-color: pink; } </style> </head> <body> <div class="div2"></div> </body> </html>
实现方式三:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>CSS</title> <style> *{ margin: 0; padding: 0; } .div1{ width: 50%; overflow: hidden; background-color: pink; } .div2{ margin: 100%; } </style> </head> <body> <div class="div1"> <div class="div2"></div> </div> </body> </html>