html float problem

I have the following code:

<div "background-color:green">
    <div "float:left">something</div>
    <div "float:right:>something else</div>
<div>

Why does the background color not appear in this case? What needs to be done to make it appear {Code simplified for understanding , may not be in the approporiate syn开发者_如何学编程tax}

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You need to clear the div. You can use clear: both on an element beneath, but I often find this is easier:

<div style="background-color:green; overflow: hidden;">
    <div style="float:left;">something</div>
    <div style="float:right;">something else</div>
<div>

Notice the overflow: hidden.

Of course, it only works where you don't require elements to leave their containing elements.

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A floated object is "lifted" from its containter. The bottom edge of the outer div doesn't stretch to its content anymore.

An option is to add an element with clear (clear takes a direction (either left, right, or both), and pushes itself below a float it would touch:

<div style="background-color: green">
    <div style="float: left">something</div>
    <div style="float: right">something else</div>
    <br style="clear: both;" />
<div>

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You need to write in the style attribute

<div style="background-color:green;">
    <div style="float:left;">something</div>
    <div style="float:right;">something else</div>
<div>