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Css margin overlay

Source: Internet
Author: User
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W3c believes that the margin stack is reasonable. Whether it is a bug or not, but this problem does exist. Let's look at the example below:

 
    
  
  1. <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    2. 
  
  2. <Html xmlns = "http://www.w3.org/1999/xhtml">
    3. 
  
  3. <Head>
    4. 
  
  4. <Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
    5. 
  
  5. </Head> 
    6. 
  
  6. <Style type = "text/css">
    7. 
  
  7. * {Padding: 0; margin: 0 ;}
    8. 
  
  8. . Box {background: # ccc ;}
    9. 
  
  9. . Content {background: # eee; margin: 20px auto ;}
    10. 
  
  10. . An-box {margin: 50px auto; background: #999999 ;}
    11. 
  
  11. </Style>
    12. 
  
  12. </Head>
    13. 
  
  13. <Body>
    14. 
  
  14. <Div class = "box">
    15. 
  
  15. <Div class = "content"> margin: 20px auto </div>
    16. 
  
  16. <Div class = "content"> margin: 20px auto </div>
    17. 
  
  17. </Div>
    18. 
  
  18. <Div class = "box">
    19. 
  
  19. <Div class = "content"> margin: 20px auto </div>
    20. 
  
  20. </Div>
    21. 
  
  21. <Div class = "box">
    22. 
  
  22. <Div class = "content"> margin: 20px auto </div>
    23. 
  
  23. </Div>
    24. 
  
  24. <Div class = "an-box"> margin: 50px auto </div>
    25. 
  
  25. </Body>
    26. 
  
  26. </Html>
    27.

There are many ways to solve this problem. Let's take a look at this. In the outer container, add overflow: hidden; zoom: 1;

 

 
    
  
  1. <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    2. 
  
  2. <Html xmlns = "http://www.w3.org/1999/xhtml">
    3. 
  
  3. <Head>
    4. 
  
  4. <Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
    5. 
  
  5. </Head> 
    6. 
  
  6. <Style type = "text/css">
    7. 
  
  7. * {Padding: 0; margin: 0 ;}
    8. 
  
  8. . Box {background: # ccc; overflow: hidden; zoom: 1}
    9. 
  
  9. . Content {background: # eee; margin: 20px auto ;}
    10. 
  
  10. . An-box {margin: 50px auto; background: #999999 ;}
    11. 
  
  11. </Style>
    12. 
  
  12. </Head>
    13. 
  
  13. <Body>
    14. 
  
  14. <Div class = "box">
    15. 
  
  15. <Div class = "content"> here there are two overlapping margin: 20px auto </div>
    16. 
  
  16. <Div class = "content"> here there are two overlapping margin: 20px auto </div>
    17. 
  
  17. </Div>
    18. 
  
  18. <Div class = "box">
    19. 
  
  19. <Div class = "content"> margin: 20px auto </div>
    20. 
  
  20. </Div>
    21. 
  
  21. <Div class = "box">
    22. 
  
  22. <Div class = "content"> margin: 20px auto </div>
    23. 
  
  23. </Div>
    24. 
  
  24. <Div class = "an-box"> margin: 50px auto </div>
    25. 
  
  25. </Body>
    26. 
  
  26. </Html>
    27.

In addition, the border attribute is added to the outer container, and the empty block element is added to the overlay element .. Also, we use padding to replace margin.

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Related Keywords:
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