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calc() function – doctypehtml.net
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<h2>
calc() function
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<p>
You can use the CSS calc() function to subtract e.g. the padding or border-width of an element from its actual width.
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<div class="outer">
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This ist the outer div with a total width of <span>100%</span>. All inner divs have 8px padding both left and right as well as an 2px border around. All inner divs also have
<code>float: left</code>.
</p>
<section class="inner calc25">
<code>width: calc(<br>
25%<br>
- 8px*2<br>
- 2px*2<br>
- 4px*2<br>
)</code>
</section>
<section class="inner calc60">
<code>width: calc(<br>
60%<br>
- 8px*2 <em>/* (padding left/right) */</em><br>
- 2px*2 <em>/* (border left/right) */</em><br>
- 4px*2 <em>/* (margin left/right) */</em><br>
)</code>
</section>
<section class="inner calc15">
<code>width: calc(<br>
15%<br>
- 8px*2<br>
- 2px*2<br>
- 4px*2<br>
)</code>
</section><br style="clear: both;">
<p class="widthselection">
<strong>Set outer width:</strong> <span class="link">100%</span>, <span class="link">90%</span>, <span class="link">75%</span>, <span class="link">65%</span>, <span class=
"link">530px</span>
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$('.widthselection span').bind('click', function() {
$('.outer').css({width: $(this).text()});
$('#intro span').text($(this).text());
});
});
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