css - Floating elements within a div, floats outside of div. Why? -

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say have div, color green , give definite width, when put stuff within it, in case img , div. idea content of container div cause container div stretch out, , background contents. when this, containing div shrinks fit non-floating objects, , floating objects either way out, or half out, half in, , not have bearing on size of big div.

why this? there i'm missing, , how can floated items stretch out height of containing div?

the easiest put overflow:hidden on parent div , don't specify height:

#parent { overflow: hidden }

another way float parent div:

#parent { float: left; width: 100% }

another way uses clear element:

<div class="parent">    <img class="floated_child" src="..." />    <span class="clear"></span> </div>

css

span.clear { clear: left; display: block; }

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