Why can't I see the top and bottom margins in Safari, Chrome, or Firefox when I've set the margin to 50px?
HTML:
<div style="width:400px;background-color:#ffffaa">
<p style="background-color:#aaffff;
padding:20px;
margin:50px;
border-style:solid;
border-width:5px;
border-color:#000000;"> Text content here…
</p>
</div>
This specific behavior is considered standard according to the guidelines outlined in the CSS box model:
Section 8.3.1 on Collapsing margins explains that when adjacent margins of two or more boxes (without padding or borders separating them) come into contact, they merge to create a single margin.
It is important to note that horizontal margins do not collapse in CSS2.
Vertical margins have the potential to collapse under certain circumstances:
- Two or more vertical margins of block boxes placed in normal flow can collapse. - The final width of the margin will be determined by the maximum widths of the adjoining margins. - In situations involving negative margins, the absolute maximum of the negative margins is subtracted from the maximum positive margins. - If there are no positive margins, the maximum negative margins are subtracted from zero. - Vertical margins between a floated box and any other box will not collapse. - Margins belonging to absolutely or relatively positioned boxes will also not collapse.
To address this issue effectively, it is recommended to adjust the top and bottom padding of the parent element, which in this case would be the div.
It appears that the solution you seek can be found below:
<div style="width:450px;background-color:#ffeedd;padding:30px">
<p style="background-color:#aaffee;
padding:15px;
border-style:dotted;
border-width:3px;
border-color:#333333;
display:block;"> Your text should go here ...
</p>
</div>
Adding content to your div, such as a space with , can effectively resolve the issue.
<div style="width:400px;background-color:#ffffaa">
<p style="background-color:#aaffff;
padding:20px;
margin:50px;
border-style:solid;
border-width:5px;
border-color:#000000;"> Text goes here ………
</p>
</div>
Indeed, it is an odd solution but it works.
Best regards, Yann
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