Inner div to have height 100% inside a container of height auto

Question

I'm struggling to get a div to expand fully to it's container's height.

Markup:

<div class="container">
  <div class="innerOne inner"></div>
  <div class="innerTwo inner"></div>
</div>

At different viewports .innerTwo's content is taller than that of .innerOne's but I would like it's background to be the same size as .innerTwo's

Styles:

.container {
   width: 100%;
   height: auto;
   background-color: yellow;   

   /* clearfix */
   *zoom: 1;
   &:before,
   &:after {
     display: table;
     content: "";
     line-height: 0;
   }
   &:after {
    clear: both;
   }
}

.inner {
   float: left;
   width: 50%;
   height: 100%;
   background-color: red;
}

But the heights wont match up. I know it can be done by giving the container a set height but I don't want to do that since it's a responsive site. Is this possible? I'd rather not use JS.

Solution 1

You can use display:table-cell property for this. Write like this:

.container{
    width:100%;
    border:1px solid red;
    display:table;
}
.inner{
    display:table-cell;
    background:green;
    width:50%;
}
.innerTwo{
    background:blue
}

Check this http://jsfiddle.net/XXHTC/

Solution 2

You can find the desired solution here: http://matthewjamestaylor.com/blog/equal-height-columns-cross-browser-css-no-hacks

Good luck :)