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SCSS 复用 class 样式

@mixin & @include

复用的变量名称，不可以是 .class 开头⚠️

✅ css-varibale-name

❌ .css-class-name

Mixins

https://sass-lang.com/guide#topic-6

API

https://sass-lang.com/documentation/at-rules/mixin

Playground

https://sass.js.org/

.router-link-custom-class {
    @mixin tools-hover-box {
        box-sizing: border-box;
        position: fixed;
        z-index: 999999;
        top: 60px;
        left: 0;
        bottom: 0;
        right: 0;
        background:#EEEEF0;
        overflow: auto;
         100vw;
        min- 1366px;
    }
    .tools-hover-box {
        @include tools-hover-box;
        height:0;
        transition: height 1s .3s ease-out;
    }
    .tools-hover-box:hover {
        @include tools-hover-box;
        height: 200px;
        transition: height 1s .3s ease-in;
    }
    &:hover {
        .tools-hover-box {
        @include tools-hover-box;
            height: 200px;
            transition: height 1s .3s ease-in;
        }
    }
}

.router-link-custom-class .tools-hover-box {
  box-sizing: border-box;
  position: fixed;
  z-index: 999999;
  top: 60px;
  left: 0;
  bottom: 0;
  right: 0;
  background: #EEEEF0;
  overflow: auto;
   100vw;
  min- 1366px;
  height: 0;
  transition: height 1s .3s ease-out;
}

.router-link-custom-class .tools-hover-box:hover {
  box-sizing: border-box;
  position: fixed;
  z-index: 999999;
  top: 60px;
  left: 0;
  bottom: 0;
  right: 0;
  background: #EEEEF0;
  overflow: auto;
   100vw;
  min- 1366px;
  height: 200px;
  transition: height 1s .3s ease-in;
}

.router-link-custom-class:hover .tools-hover-box {
  box-sizing: border-box;
  position: fixed;
  z-index: 999999;
  top: 60px;
  left: 0;
  bottom: 0;
  right: 0;
  background: #EEEEF0;
  overflow: auto;
   100vw;
  min- 1366px;
  height: 200px;
  transition: height 1s .3s ease-in;
}

refs

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