- <!DOCTYPE html>
- <html lang="en" style="font-size: 50px">
- <head>
- <meta charset="UTF-8">
- <title>Document</title>
- <style>
- body {
- margin: 0;
- padding: 0;
- line-height: 1;
- }
- .container {
- font-size: 25px;
- }
- .em {
- font-size: 2em;
- }
- .rem {
- font-size: 2rem;
- }
- </style>
- </head>
- <body>
- <div class="container">
- <div class="em">AAAAA</div>
- <div class="rem">AAAAA</div>
- </div>
- </body>
- </html>
- <!DOCTYPE html>
- <html lang="en">
-
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="ie=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
- <title>rem适配</title>
- <style type="text/css">
- * {
- margin: 0;
- padding: 0;
- }
- /* 假设的设备 320 414 640 */
- @media (min-width: 320px) {
- html {
- font-size: 50px;
- }
- }
- @media (min-width: 414px) {
- html {
- font-size: 64.6875px; /* 100/640*414 */
- }
- }
- @media (min-width: 640px) {
- html {
- font-size: 100px;
- }
- }
- /* rem适配 */
- header {
- width: 100%;
- height: 1rem;
- line-height: 1rem;
- font-size: 0.32rem;
- text-align: center;
- background: green;
- color: #fff;
- }
- </style>
- </head>
-
- <body>
- <header>购物车</header>
- </body>
-
- </html>