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元素水平垂直居中方法

方案一、弹性盒子沿主轴和侧轴居中

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
    display: flex;
    
    justify-content: center;
   	align-items: ceter;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
}

方案二、弹性盒子设置自动的边距

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
    display: flex;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
    
    margin: auto;
}

方案三、定位设置子元素左上角位于父元素中心,然后通过translate参考自身宽高,分别移动-50%

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
    position: relative;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%)
}

方案三、通过margin计算上下边距设置垂直居中,然后用auto实现水平居中

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
	margin: 150px auto;
}

方案四、类似方案二,设置上下左右距离都是0,然后设置auto的边距

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
    position: relative;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

方案五、类似方案三,先将子元素左上角定位到父元素中心,然后利用margin参考自身宽高,分别左移和上移50%

.outer {
    width: 400px;
    height: 400px;
    background-color: #888;
    position: relative;
}
.inner {
    width: 100px;
    height: 100px;
    background-color: orange;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -50px;
    margin-left: -50px;
}
posted on 2024-04-06 13:55  树深时见鹿nnn  阅读(55)  评论(0编辑  收藏  举报