css 垂直居中的几种方式

元素示例

<template>
    <div class="margin"
         style=" 500px;
                height: 500px;
                background-color: yellow">
        <div class="center"
             style=" 200px;
                    height: 200px;
                    background-color: red">
        </div>
    </div>
</template>

 

Part.1  绝对定位 + 百分比

.margin {
    position: relative;
}
.center {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -100px;
}

 

Part.2  绝对定位 + transform

.margin {
    position: relative
}
.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%)
}

 

Part.3  绝对定位 + 0

.margin {
    position: relative
}
.center {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: auto
}

Part.4  flex

.margin {
    display: flex;
    justify-content: center;
    align-items: center;
}

 

Part.5  flex + margin

.margin {
    display: flex
}
.center {
    margin: auto
}