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CSS Priority policy

Source: Internet
Author: User
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HTML code
  2. <html>
  4. <head>
  6. <title>testcss</title>
  8. <style type="Text/css">
  10. h2{
  12. color:red;
  14. }
  16. h2{
  18. Color:green;
  20. }
  22. h3{
  24. color:red;
  26. }
  28. h5{
  30. Color:green;
  32. }
  34. </style>
  36. <link rel="stylesheet" type="text/css" href= "A.css"/>
  38. </head>
  40. <body>
  42. <H1 style="Color:red;color:green">1. Green, when the inline way defines Color:red;color:green, whichever is later, the front overlay </H1>
  44. <H2 >2 Green, when the inline way defines two times the color, whichever is later, the previous overlay </h2>
  46. <h3 style="Color:green">3. When defined inline and internal style sheets, inline takes precedence over internal style sheets </h3>
  48. <h4 style="Color:green">4. When you define inline and internal style sheets, inline overrides the internal style sheet, regardless of where the internal style sheet is stored </ H3>
  50. <h5>5. When both an internal style sheet and an external style sheet are defined, the inline style is related to the order defined by the external style sheet, whichever follows, followed by the previous overlay </h5>
  52. </Body>
  54. <style type="Text/css">
  56. h4{
  58. color:red;
  60. }
  62. </style>
  68. </html>

Execution Result:

HTML code
  2. <html>
  4. <head>
  6. <title>testcss</title>
  8. <style type="Text/css">
  10. h1{
  12. Color:green;
  14. }
  16. #h1id {
  18. Color:blue;
  20. }
  22. . h1class{
  24. Color:yellow;
  26. }
  30. #h2id h2{
  32. Color:blue;
  34. }
  36. . H2class h2{
  38. Color:yellow
  40. }
  42. Div h2{
  44. color:red;
  46. }
  48. </style>
  50. </head>
  52. <body>
  54. One, inline >>id selector >> class selector >> tag Selector >;: means the first meaning <BR >
  56.             < h1 style= "color:red"  < span class= "attribute" >id= "h1id"  class=" H1class ">1. Red   Inline, tag Selector, class selector, ID selector are compliant, precedence inline </< Span class= "Tag-name" >h1>  
  58.             < h1 style= " id= "h1id"  class= "H1class" >2. Blue   Tag Selector, class selector, ID selector all compliant, priority ID Selector </h1>  
  60. <H1 style="" class="H1class">3. Yellow Tag Selector, class selector compliant, priority class selector </H1>
  62. <H1 style="" >4. Green is ultimately the label selector </H1>
  64. Second, the derivative selector still adheres to the above rule ID derivation >> Class derivation >> Label derivation
  66. <div id="h2id" class="H2class"><h2 >1. Blue </H2 ></div>
  68.               < div            class= "H2class" > <h2>2. Yellow </h2 ></div>  
  70. <div ><h2>3. Red </H2></div&G  T
  72. </Body>
  80. </html>

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