flex 布局转 class 类名实现

代码

 .flex {
     display: flex;
 }

 @wrap: nowrap, wrap;
 @align-content: flex-start, flex-end, center, space-between, space-around, stretch;
 @align-items: flex-start, flex-end, center, baseline, stretch;
 @justify-content: flex-start, flex-end, center, space-between, space-around;


 each(@wrap, {
         .flex.@{value} {
             flex-wrap: @value;
         }
     }
 );

 each(@align-content, {
         .flex.ac-@{value} {
             align-content: @value;
         }
     }
 );

 each(@align-items, {
         .flex.ai-@{value} {
             align-items: @value;
         }
     }
 );

 each(@justify-content, {
         .flex.jc-@{value} {
             justify-content: @value;
         }
     }
 );

编译后

.flex {
  display: flex;
}
.flex.nowrap {
  flex-wrap: nowrap;
}
.flex.wrap {
  flex-wrap: wrap;
}
.flex.ac-flex-start {
  align-content: flex-start;
}
.flex.ac-flex-end {
  align-content: flex-end;
}
.flex.ac-center {
  align-content: center;
}
.flex.ac-space-between {
  align-content: space-between;
}
.flex.ac-space-around {
  align-content: space-around;
}
.flex.ac-stretch {
  align-content: stretch;
}
.flex.ai-flex-start {
  align-items: flex-start;
}
.flex.ai-flex-end {
  align-items: flex-end;
}
.flex.ai-center {
  align-items: center;
}
.flex.ai-baseline {
  align-items: baseline;
}
.flex.ai-stretch {
  align-items: stretch;
}
.flex.jc-flex-start {
  justify-content: flex-start;
}
.flex.jc-flex-end {
  justify-content: flex-end;
}
.flex.jc-center {
  justify-content: center;
}
.flex.jc-space-between {
  justify-content: space-between;
}
.flex.jc-space-around {
  justify-content: space-around;
}

测试

css

span {
  border: 1px solid gray;
}
div {
  width: 100px;
  height: 200px;
  padding: 10px;
  margin:10px;
  border: 1px solid black;
}

  <div>
    <span>小二</span>
    <span>张建国</span>
    <span>张三</span>
    <span>李四</span>
    <span>王梅梅</span>
  </div>

flex-wrap属性 : nowrap

  <div class="flex nowrap">
    <span>小二</span>
    <span>张建国</span>
    <span>张三</span>
    <span>李四</span>
    <span>王梅梅</span>
  </div>

flex-wrap属性 : wrap

 <div class="flex wrap" style="width: 100%;">
   <h1 style="width: 100%;">小二</h1>
   <h1 style="width: 100%;">张三</h1>
   <h1 style="width: 100%;">李四</h1>
   <h1 style="width: 100%;">王五</h1>
 </div>

align-items属性 : baseline

  <div class="flex ai-baseline">
    <span>小二</span>
    <span>张建国</span>
    <span>张三</span>
    <span>李四</span>
    <span>王梅梅</span>
  </div>

使用 chrome F12 移到样式上，可以看到 baseline，也就是紫色的线

align-content属性 : flex-end

  <div class="flex wrap ac-flex-end">
    <span>小二</span>
    <span>张建国</span>
    <span>张三</span>
    <span>李四</span>
    <span>王梅梅</span>
  </div>

justify-content属性 : space-around

  <div class="flex wrap jc-space-around">
    <span>小二</span>
    <span>张建国</span>
    <span>张三</span>
    <span>李四</span>
    <span>王梅梅</span>
  </div>