经常运用体式格局排列

• float
• absolute
• table
• flex
• grid

float

    <div class="container">
        <div class="left">left</div>
        <div class="right">right</div>
        <div class="center">center</div>
    </div>

.container {
    overflow: auto;  
}
.left {
    width: 200px;
    float: left;
    background-color: #1ABC9C;
}
.right {
    width: 200px;
    float: right;
    background-color: #2ECC71;
}
.center {
    margin-left: 200px;
    margin-right: 200px;
    background-color: #3498DB;
}

上面完成体式格局长处,完成简朴兼容性好

瑕玷：依据衬着的划定规矩,从上到下,也就是说left和right会优先衬着, center部分会末了衬着.

优化体式格局-1

应用负margin来完成

<div class="container">
    <div class="center">
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
    </div>
    <div class="left">left</div>
    <div class="right">right</div>
</div>

.container {
    overflow: auto;  
}
.left,
.right,
.center {
    box-sizing: border-box;
}
.left {
    width: 200px;
    float: left;
    background-color: #1ABC9C;
    margin-left: -100%;
}
.right {
    width: 200px;
    float: right;  // float:left;
    background-color: #2ECC71;
    margin-left: -200px;
}
.center {
    float: left;
    width: 100%;
    padding-left: 200px;
    padding-right: 200px;
    background-color: #3498DB;

}

完成前面主要内容优先加载题目,然则又有新题目,当主体内容太长的时,发明背景(边框、背景图等等)影响到了两侧

假如只处置惩罚背景题目能够运用下面体式格局

    .center {
        background-clip:  content-box
    }

假如有边框、背景图片等明显上面不能满足。

优化体式格局二 (圣杯规划)

<div class="container">
    <div class="center">
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
    </div>
    <div class="left">left</div>
    <div class="right">right</div>
</div>

.container {
    margin:0 200px;
    position: relative;
}
.left,
.right,
.center {
    box-sizing: border-box;
}

.center {
    float: left;
    width: 100%;
    background-color: #3498DB;
}
.left {
    position: relative;
    left:-200px;
    float: left;
    width: 200px;
    margin-left: -100%;
    background-color: #1ABC9C;
}

.right {
    position: relative;
    right:-200px;
    float: right;
    width: 200px;
    margin-left: -200px;
    background-color: #2ECC71;
}

优化体式格局三: (双飞翼规划) 给 center 元素包裹一个容器

    <div class="container">
        <div class="center-warpper">
            <div class="center">
                <p>center</p>
                <p>center</p>
                <p>center</p>
                <p>center</p>
                <p>center</p>
                <p>center</p>
                <p>center</p>
            </div>
        </div>
        <div class="left">left</div>
        <div class="right">right</div>
    </div>

.container {
    overflow: auto;
}

.left,
.right,
.center,
.center-warpper {
    box-sizing: border-box;
}
.center-warpper {
    float:left;
    width: 100%;
    padding-left: 200px;
    padding-right: 200px;
}
.center {
    width: 100%;
    overflow: auto;
    background-color: #3498DB;
}
.left {
    width: 200px;
    float: left;
    background-color: #1ABC9C;
    margin-left: -100%;
}

.right {
    width: 200px;
    float: right;
    background-color: #2ECC71;
    margin-left: -200px;
}

处置惩罚体式格局二和三处理体式格局异常相似,只是处置惩罚的细节不一样. 详细用谁人都能够平常引荐用前者

absolute

 <div class="container">
    <div class="center">
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
    </div>
    <div class="left">left</div>
    <div class="right">right</div>
</div>

.container {
    position: relative;
}

.left,
.right,
.center {
    box-sizing: border-box;
}
.center {
    position: absolute;
    left: 200px;
    right: 200px;
    background-color: #3498DB;
}
.left {
    position: absolute;
    left: 0;
    width: 200px;
    background-color: #1ABC9C;
}
.right {
    position: absolute;
    right: 0;
    float: right;
    width: 200px;
    background-color: #2ECC71;
}

table

     <div class="container">
        <div class="left">left</div>
        <div class="center">
            <p>center</p>
            <p>center</p>
            <p>center</p>
            <p>center</p>
            <p>center</p>
            <p>center</p>
            <p>center</p>
        </div>
        <div class="right">right</div>
    </div>

.container {
    position: relative;
    display: table;
    width: 100%;
}

.left,
.right,
.center {
    box-sizing: border-box;
    display: table-cell;
}
.center {
    background-color: #3498DB;
}
.left {
    width: 200px;
    background-color: #1ABC9C;
}

.right {
    width: 200px;
    background-color: #2ECC71;
}

flex

<div class="container">
    <div class="left">left</div>
    <div class="center">
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
    </div>
    <div class="right">right</div>
</div>

.container {
    position: relative;
    display: flex;
    width: 100%;
}

.left,
.right,
.center {
    box-sizing: border-box;
    display: table-cell;
}

.center {
    background-color: #3498DB;
    flex:1;
}

.left {
    width: 200px;
    background-color: #1ABC9C;
}

.right {
    width: 200px;
    background-color: #2ECC71;
}

Grid

 <div class="container">
    <div class="left">left</div>
    <div class="center">
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
        <p>center</p>
    </div>
    <div class="right">right</div>
</div>

.container {
    position: relative;
    display: grid;
    width: 100%;
    grid-template-columns: 200px auto 200px;
}

.left,
.right,
.center {
    box-sizing: border-box;
}

.center {
    background-color: #3498DB;
}

.left {
    background-color: #1ABC9C;
}

.right {
    background-color: #2ECC71;
}

上面就是完成的几种体式格局, 仔细同砚应当能够看到 float、absoulut 这两种体式格局摆布两列并不会跟着中心内容地区高度变化而变化。

假如想要建立三列规划中心自适应，且三列都等高的话挑选 table、flex、Grid;

详细兼容可查阅 兼容性检察

假如有更好的体式格局，人人能够在批评区给出; 一同议论进修