# margin-left

margin-left 属性 设置与元素相关联的盒子模型的左外边距。这个值可以为负值。

# uni-app x 兼容性

Web Android iOS
4.0 3.9 4.11

# 语法

margin-left: <length> | <percentage> | auto;

# margin-left 的属性值

名称 兼容性 描述
auto
auto 关键词表示在当前布局模式下,浏览器根据接收的左边距自动计算出外边距。如果有几组 margin-left 和 margin-right 设置为 auto,那么最后计算的空间分布,会根据 display,float,position 属性,自动生成以下几种情况:



Value of display
Value of float
Value of position
Computed value of auto
Comment




inline, inline-block, inline-table
any
static or relative
0
Inline layout mode


block, inline, inline-block, block, table, inline-table, list-item, table-caption
any
static or relative
0, 除非margin-left和 margin-right 同时都设置为 auto。这样的话,元素就被设置为基于父元素居中。
Block layout mode


block, inline, inline-block, block, table, inline-table, list-item, table-caption
left or right
static or relative
0
Block layout mode (floating element)


any table-, except table-caption
any
any
0
Internal table-
elements don't have margins, use border-spacing instead


any, except flex, inline-flex, or table-*
any
fixed or absolute
0, except if both margin-left and margin-right are set to auto. In this case, it is set to the value centering the border area inside the available width, if fixed.
Absolutely positioned layout mode


flex, inline-flex
any
any
在水平方向上有空余空间的情况下,空余的空间会被平均分给水平方向上写有 margin-left:auto 属性的元素的外边距
Flexbox layout mode

# 默认值

0

注意

  • app平台不支持外边距重叠
  • HBuilderX3.98以下版本当 position 设置为 fixed 或 absolute 时, margin不支持 auto

# 示例

hello uni-app x

扫码体验(手机浏览器跳转到App直达页)

Template

Script

<template>
  <view style="flex-grow: 1;">
    <view>
      <text>margin-left: 25px</text>
      <view style="width: 250px;height: 250px;background-color: gray;">
        <view class="common" style="background-color: red;"></view>
        <view class="common" style="margin-left: 25px;"></view>
        <view class="common" style="background-color: blue;"></view>
      </view>
    </view>

    <view>
      <text>margin-left: 10%</text>
      <view style="width: 250px;height: 250px;background-color: gray;">
        <view class="common" style="background-color: red;"></view>
        <view class="common" style="margin-left: 10%;"></view>
        <view class="common" style="background-color: blue;"></view>
      </view>
    </view>
  </view>
</template>



<style>
  .common {
    height: 50px;
    background-color: green;
  }
</style>

# 参见