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实例演示选择器的优先级,id,class,tag
小丑0o鱼
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  1. <!DOCTYPE html>
  2. <html lang="zh-cn">
  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>1. 实例演示选择器的优先级,id,class,tag;</title>
  8. <style>
  9. /* 选择器 + 声明块 = 样式规则 */
  10. /* 在样式的优先级相同情况下,书写顺序决定优先级 写在后面的样式会覆盖前面的样式*/
  11. /* 选择器本身优先级大于书写顺序 */
  12. #first .active{
  13. color: tomato;
  14. }
  15. h1 {
  16. color: red;
  17. }
  18. h1 {
  19. color: violet;
  20. }
  21. .active {
  22. color: teal;
  23. }
  24. #first {
  25. color: tomato;
  26. }
  27. </style>
  28. </head>
  29. <body>
  30. <h1 class="active" id="first">
  31. 初次(美好的邂逅),爱···需要遇见,初次···需要呵护~~~
  32. </h1>
  33. </body>
  34. </html>
  35. 前端组件样式模块化的原理与实现
  36. <!DOCTYPE html>
  37. <html lang="zh-cn">
  38. <head>
  39. <meta charset="UTF-8">
  40. <meta http-equiv="X-UA-Compatible" content="IE=edge">
  41. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  42. <link rel="stylesheet" href="css/love.css">
  43. <title>前端组件样式模块化的原理与实现</title>
  44. </head>
  45. <!-- <style>
  46. @import url(css/header1.css);
  47. @import url(css/main1.css);
  48. @import url(css/footer1.css);
  49. </style> -->
  50. <body>
  51. <header align="center"><h2>如果说浑身充满力量</h2></header>
  52. <main><h2>是因为雄性激素的膨胀</h2></main>
  53. <footer align="right"><strong class="active">雄起</strong>是因为什么~~~</footer>
  54. <!-- 在根目录创建一个CSS文件夹,在里边创建3个文本header,main,footer,分装入各自的样式,
  55. 然后统一使用<link rel="stylesheet" href="css/xxx.css">调用 -->
  56. </body>
  57. </html>

实例演示常用伪类选择器的使用方式,并用伪类来模块化元素组件(例如表单或列表)

Correcting teacher:PHPzPHPz

Correction status:qualified

Teacher's comments:
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