Css float issue -

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http://jsfiddle.net/55ruh/9/. red box doesn't bigger if enter text.

<div class="box" style="background: red">     <div class="lefty">text</div>     <div class="righty">text</div> </div>      .box {     background: red;     width: 229px;     color: white; }  .lefty {     float: left; }  .righty {     float: right; }

http://jsfiddle.net/55ruh/10/

float causes element out of flow of document.

on parent element:

zoom: 1; /* ie fix */ overflow: hidden;

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