Three implementation methods of CSS three-column layout (Holy Grail layout, double flying wing layout, Flex layout)

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Rendering:

##Holy Grail Layout

nbsp;html>


<title>圣杯</title>
<style>
.container{
    padding:0 200px 0 180px;
    height:100px;
}
.left{
    float:left;
    width:180px;
    height:100px;
    margin-left:-100%;
    background:red;
    position:relative;
    left:-180px;
}
.main{
    float:left;
    width:100%;
    height:100px;
    background:blue;
}

.right{
    float:left;
    width:200px;
    height:100px;
    margin-left:-200px;
    background:green;
    position:relative;
    right:-200px;
}

</style>


<div>
  <div>middle</div>
  <div>left</div>
  <div>right</div>
Double Flying Wing Layout<h3><pre class="brush:php;toolbar:false">nbsp;html>


    <meta>
    <title>双飞翼</title>
    <style>
.main{
    float:left;
    width:100%;/*左栏上去到第一行*/     
    height:100px;
    background:blue;
}
.left{
    float:left;
    width:180px;
    height:100px;
    margin-left:-100%;
    background:red;
}
.right{
    float:left;
    width:200px;
    height:100px;
    margin-left:-200px;
    background:green;
}
</style>


  <div></div>
  <div>left</div>
  <div>right</div>

Flex Layout

nbsp;html>


    <meta>
    <title>Flex</title>
    <style>
.flex {
    display: flex;
    flex-flow: row;
}
.left{
    width: 180px;
    height: 100px;    
    background-color: red;
}
.main{
    flex: 1; 
    height: 100px;
    background-color: blue;
}
.right {
    width: 200px;
    height: 100px;
    background-color: green;
}
    </style>


<div>
    <div>left</div>
    <div>middle</div>
    <div>right</div>
</div>

If the main wants to give a certain width to both the left module on the left and the right module on the right, there are only two ways: padding: 0 100px 0 200px; or margin: 0 100px 0 200px;!

These two routes:
If you take the margin route, keep going all the way, you will find that the final code you write is a double flying wing;
If you take the padding route, it is the Holy Grail!

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