html - Margin bottom not working on %100 div -

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i have following html code:

<html>  <body style="margin:0px; padding:0px;">    <div id="outer" style="height:100%;">      <div id="header" style="height:40px; background:blue;">header</div>      <div id="main" style="height:100%; margin-bottom:-40px; background:red; overflow:auto;">         <p style="height:1000px">main</p>      </div>    </div>  </body> </html>

i want vertical scroll appear on main div when content within exceeds viewable area, seems margin-bottom on main div not working.

can me issue?

you seem solving wrong problem, actually. if want rid of scroll bar body itself, set body's style overflow:hidden.

<html>   <body style="margin:0px; padding:0px;overflow:hidden;">    <div id="outer" style="height:100%;">      <div id="header" style="height:40px; background:blue;">header</div>      <div id="main" style="height:100%; margin-bottom:-40px; background:red; overflow:auto;">         <p style="height:1000px">main</p>      </div>    </div>  </body> </html>

this should resolve margin issue, , have keep sizes right.


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