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CSS CSS Foundations The Box Model Floats

Why add another element with clear property applied to stop parent collapse?

My understanding is that if a parent contains floated child elements it collapses because it does not expand around the floated children as it ignores them when calculating its height.

Why does the addition of another element (virtual or otherwise)with clear applied make parent the consider the heights of the floated children?

Let me make my question clear with this crude code below:

  <p style="float: left;">Div 1</p>    /*height not considered*/
  <p style="float: left;">Div 2</p>    /*height not considered*/
  <div class="clearfix"></div>    /*why does this make the parent include child heights above */   



Any help much appreciated.

1 Answer

Jeff Lemay
Jeff Lemay
14,268 Points

Simple answer: because floats are weird.

Check out this article for (pretty much) everything you need to know about floats: https://css-tricks.com/all-about-floats/

I have already read that article....It doesn't shed light on my question...Thanks