封装flex布局（Less）_less封装-程序员宅基地

封装布局代码如下，使用less封装

/**
* flex布局封装
*
* 类名命名规则：
*
*     f-{主轴方向}-{justify-content}-{align-items} 
*
*     主轴方向： row横向、col纵向、rr横向反转主轴、cr纵向反转主轴
*
*     justify-content、align-items规则：
*         s:flex-start
*         e:flex-end
*         c:center
*         b:space-between
*         a:space-around
*
*     特定类名：
*         f：开启flex布局，不进行其他设置
*         f-w：允许换行，flex-wrap缩写
*         f-d-z:禁止缩放，flex-disabled-zoom flex:0 0 auto;缩写
*         f-z:允许缩放，flex-zoom flex:1 1 auto;缩写
*/


.flex-align-items-mixins(@flexDirection, @justifyContent) {

  &-s {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: @justifyContent;
    align-items: flex-start;
  }

  &-c {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: @justifyContent;
    align-items: center;
  }

  &-e {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: @justifyContent;
    align-items: flex-end;
  }
}

.flex-mixins(@flexDirection) {
  display: flex;
  flex-direction: @flexDirection;

  &-s {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: flex-start;
    .flex-align-items-mixins(@flexDirection, flex-start)
  }

  &-c {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: center;
    .flex-align-items-mixins(@flexDirection, center)
  }

  &-e {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: flex-end;
    .flex-align-items-mixins(@flexDirection, flex-end)
  }

  &-b {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: space-between;
    .flex-align-items-mixins(@flexDirection, space-between)
  }

  &-a {
    display: flex;
    flex-direction: @flexDirection;
    justify-content: space-around;
    .flex-align-items-mixins(@flexDirection, space-around)
  }
}

.f {
  display: flex;

  &-d-z {
    display: flex;
    // 禁止缩放
    flex: 0 0 auto;
  }

  &-z {
    display: flex;
    // 禁止缩放
    flex: 1 1 auto;
  }

  &-w {
    display: flex;
    // 允许换行
    flex-wrap: wrap;
  }

  &-row {
    display: flex;
    // 横向主轴
    .flex-mixins(row)
  }

  &-col {
    display: flex;
    // 纵向主轴
    .flex-mixins(column)
  }

  &-rr {
    display: flex;
    // 横向反转主轴
    .flex-mixins(row-reverse)
  }

  &-cr {
    display: flex;
    // 纵向反转主轴
    .flex-mixins(column-reverse)
  }

}

编译为css后的代码

.f {
  display: flex;
}
.f-d-z {
  display: flex;
  flex: 0 0 auto;
}
.f-z {
  display: flex;
  flex: 1 1 auto;
}
.f-w {
  display: flex;
  flex-wrap: wrap;
}
.f-row {
  display: flex;
  flex-direction: row;
}
.f-row-s {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
}
.f-row-s-s {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
}
.f-row-s-c {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
}
.f-row-s-e {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-end;
}
.f-row-c {
  display: flex;
  flex-direction: row;
  justify-content: center;
}
.f-row-c-s {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
}
.f-row-c-c {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.f-row-c-e {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-end;
}
.f-row-e {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
}
.f-row-e-s {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  align-items: flex-start;
}
.f-row-e-c {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  align-items: center;
}
.f-row-e-e {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  align-items: flex-end;
}
.f-row-b {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
.f-row-b-s {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-start;
}
.f-row-b-c {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}
.f-row-b-e {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
}
.f-row-a {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
}
.f-row-a-s {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: flex-start;
}
.f-row-a-c {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
}
.f-row-a-e {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: flex-end;
}
.f-col {
  display: flex;
  flex-direction: column;
}
.f-col-s {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.f-col-s-s {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
}
.f-col-s-c {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}
.f-col-s-e {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-end;
}
.f-col-c {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.f-col-c-s {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.f-col-c-c {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.f-col-c-e {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
}
.f-col-e {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.f-col-e-s {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
}
.f-col-e-c {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
}
.f-col-e-e {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
}
.f-col-b {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.f-col-b-s {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
}
.f-col-b-c {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}
.f-col-b-e {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
}
.f-col-a {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}
.f-col-a-s {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: flex-start;
}
.f-col-a-c {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
}
.f-col-a-e {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: flex-end;
}
.f-rr {
  display: flex;
  flex-direction: row-reverse;
}
.f-rr-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-start;
}
.f-rr-s-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-start;
  align-items: flex-start;
}
.f-rr-s-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-start;
  align-items: center;
}
.f-rr-s-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-start;
  align-items: flex-end;
}
.f-rr-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: center;
}
.f-rr-c-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: center;
  align-items: flex-start;
}
.f-rr-c-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: center;
  align-items: center;
}
.f-rr-c-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: center;
  align-items: flex-end;
}
.f-rr-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
}
.f-rr-e-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  align-items: flex-start;
}
.f-rr-e-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  align-items: center;
}
.f-rr-e-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  align-items: flex-end;
}
.f-rr-b {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
}
.f-rr-b-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
  align-items: flex-start;
}
.f-rr-b-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
  align-items: center;
}
.f-rr-b-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
  align-items: flex-end;
}
.f-rr-a {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-around;
}
.f-rr-a-s {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-around;
  align-items: flex-start;
}
.f-rr-a-c {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-around;
  align-items: center;
}
.f-rr-a-e {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-around;
  align-items: flex-end;
}
.f-cr {
  display: flex;
  flex-direction: column-reverse;
}
.f-cr-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-start;
}
.f-cr-s-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-start;
  align-items: flex-start;
}
.f-cr-s-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-start;
  align-items: center;
}
.f-cr-s-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-start;
  align-items: flex-end;
}
.f-cr-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: center;
}
.f-cr-c-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: center;
  align-items: flex-start;
}
.f-cr-c-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: center;
  align-items: center;
}
.f-cr-c-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: center;
  align-items: flex-end;
}
.f-cr-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
}
.f-cr-e-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  align-items: flex-start;
}
.f-cr-e-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  align-items: center;
}
.f-cr-e-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  align-items: flex-end;
}
.f-cr-b {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
}
.f-cr-b-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
  align-items: flex-start;
}
.f-cr-b-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
  align-items: center;
}
.f-cr-b-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
  align-items: flex-end;
}
.f-cr-a {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-around;
}
.f-cr-a-s {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-around;
  align-items: flex-start;
}
.f-cr-a-c {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-around;
  align-items: center;
}
.f-cr-a-e {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-around;
  align-items: flex-end;
}

flex相关知识

order 排序越小越靠前，在子元素上设置

align-self 设置单个元素对齐方式

flex-grow： 默认0 放大比例 空间多余不自动放大
flex-shrink： 默认1 空间不足自动缩小
flex-basis： 容器元素所占大小 默认auto 与实际大小一致，缩放时根据此值计算是否有多余空间

flex：flex-grow、flex-shrink 、flex-basis  默认 0 1 auto ，不可放大可缩小大小与容器元素一致

flex：none; 等价于 flex: 0 0 auto;

flex:auto; 等价于 flex: 1 1 auto;

flex: 1 等价于
    flex-grow: 1;
    flex-shrink: 1;
    flex-basis: 0%; 这里特殊为0%

flex: 6 8; 等价于
    flex-grow: 6;
    flex-shrink: 8;
    flex-basis: 0%; 这里特殊为0%

flex: 200px; 等价于 
    flex-grow: 1;
    flex-shrink: 1;
    flex-basis: 200px

flex: 100%; 等价于 
    flex-grow: 1;
    flex-shrink: 1;
    flex-basis: 100%; 这里特殊，设置为百分比是相对于容器的而不是自身的

本文链接：https://blog.csdn.net/zxBlogs/article/details/125127322

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