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HomeWeb Front-endCSS TutorialTwo ways to adapt float height to multiple divs in CSS

css Multiple div floats are arranged side by side, and the heights are all adaptive (auto-increasing)

When using Div + CSS for three-column or two-column layout, the height of the two columns (or three columns) must be the same. It is easy to implement using Table, but it is more troublesome to use Div + CSS. According to the general practice, most of them use background image filling or JS script to make the height the same.

Two ways to adapt float height to multiple divs in CSS

Method 1: Pure CSS solution (method combining "hidden container overflow" and "positive inner patch" and "negative outer patch"):

<style type="text/css">
<!--
#wrap{overflow:hidden;}
#sidebar_left,#sidebar_right{padding-bottom:100000px;margin-bottom:-100000px;}
-->
</style>
<div id="wrap" style="width:300px; background:#FFFF00;">
    <div id="sidebar_left" style="float:left;width:100px; height:1000px; background:#FF0000;">Left</div>
    <div id="sidebar_mid" style="float:left;width:100px; background:#666;">
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    Middle<br />
    </div>
    <div id="sidebar_right" style="float:right;width:100px; height:500px; background:#0000FF;">Right</div>
</div>

Method 2: js solution (idea, this method is not recommended):

<script>
var a=Math.max(document.getElementById("left").offsetHeight,document.getElementById("center").offsetHeight,document.getElementById("right").offsetHeight);  //获取3个div的最大高度
document.getElementById("left").style.height = a + "px";
document.getElementById("center").style.height = a + "px";
document.getElementById("right").style.height = a + "px";
</script>

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