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CSS:盒模型-复习

发布于:2022-05-17 12:09:18  栏目:技术文档
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8">
  5. <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7. <title>盒模型</title>
  8. </head>
  9. <body>
  10. <!-- <div class="box"> -->
  11. <div class="box1">
  12. </div>
  13. <style>
  14. .box {
  15. /* em绑定当年或父级的font-size */
  16. /* width: 160px; */
  17. font-size: 10px;
  18. width: 10em;
  19. height: 150px;
  20. border: 3px solid red;
  21. box-sizing: border-box;
  22. }
  23. .box2{
  24. /* rem永远和html中的fontsize绑定 */
  25. font-size: 10px;
  26. width: 10rem;
  27. height: 150px;
  28. border: 3px solid red;
  29. box-sizing: border-box;
  30. }
  31. .box1{
  32. /* vh,vm */
  33. /* vm可视窗口宽度的1%, vh可视窗口的高度的1% */
  34. width: 50vw;
  35. height: 30vh;
  36. background-color: red;
  37. }
  38. </style>
  39. </body>
  40. </html>
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