[html] Twitter Bootstrap 3 Sticky Footer

I wanted a flexible sticky footer, which is why I came here. Top answers got me in the right direction.

The current (2 Oct 16) Bootstrap 3 css Sticky footer (Fixed size) looks like this:

html {
  position: relative;
  min-height: 100%;
}
body {
  /* Margin bottom by footer height */
  margin-bottom: 60px;
}
.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  /* Set the fixed height of the footer here */
  height: 60px;
  background-color: #f5f5f5;
}

As long as the footer has a fixed size, the body margin-bottom creates a push to allow a pocket for the footer to sit in. In this case, both are set to 60px. But if the footer is not fixed and exceeds 60px height, it will cover your page content.

Make Flexible: Delete the css body margin and footer height. Then add JavaScript to get the footer height and set the body marginBottom. That is done with the setfooter() function. Next add event listeners for when the page first loads and on resizing that run the setfooter. Note: If you footer has an accordion or anything else that triggers a size change, without a resize of window, you must call the setfooter() function again.

Run the snippet and then fullscreen to demo it.

_x000D_
_x000D_
function setfooter(){_x000D_
 var ht = document.getElementById("footer").scrollHeight;_x000D_
 document.body.style.marginBottom = ht + "px";_x000D_
}_x000D_
_x000D_
window.addEventListener('resize', function(){_x000D_
  setfooter();_x000D_
 }, true);_x000D_
window.addEventListener('load', function(){_x000D_
 setfooter();_x000D_
}, true);
_x000D_
html {_x000D_
  position: relative;_x000D_
  min-height: 100%;_x000D_
}_x000D_
.footer {_x000D_
  position: absolute;_x000D_
  bottom: 0;_x000D_
  width: 100%;_x000D_
  _x000D_
  /* additional style for effect only */_x000D_
   text-align: center;_x000D_
    background-color: #333;_x000D_
    color: #fff;_x000D_
}_x000D_
  _x000D_
_x000D_
_x000D_
body{_x000D_
/* additional style for effect only not needed in bootstrap*/_x000D_
  padding:0;_x000D_
  margin: 0;_x000D_
  }
_x000D_
<div>_x000D_
  Page content_x000D_
  <br>  <br>_x000D_
  line 3_x000D_
  <br>  <br>_x000D_
  line 5_x000D_
  <br>  <br>_x000D_
  line 7_x000D_
  _x000D_
 </div>_x000D_
_x000D_
_x000D_
<footer id="footer" class="footer">_x000D_
      <div class="container">_x000D_
        <p class="text-muted">Footer with a long text, so that resizing, to a smaller screen size, will cause the footer to grow taller. But the footer will not overflow onto the main page.</p>_x000D_
      </div>_x000D_
    </footer>
_x000D_
_x000D_
_x000D_

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