如何在Scss中使用祖父母选择器

时间:2019-03-13 13:46:37

标签: css sass

我需要使用不同颜色的图标在5种状态下设置按钮组件的样式,并在以下CSS中使用

#add-member-dialog #add-username-to-list .to-list-button-icon:before {
    content: url("../images/func_personplus_16_ena.png");
}
#add-member-dialog #add-username-to-list:hover .to-list-button-icon:before {
    content: url("../images/func_personplus_16_hov.png");
}
#add-member-dialog #add-username-to-list:disabled .to-list-button-icon:before {
    content: url("../images/func_personplus_16_dis.png");
}
#add-member-dialog #add-username-to-list:active .to-list-button-icon:before {
    content: url("../images/func_personplus_16_act.png");
}
#add-member-dialog #add-username-to-list:active:hover .to-list-button-icon:before {
    content: url("../images/func_personplus_16_onb.png");
}

此类项目在与#add-username-to-list相关的伪类中有所不同。 我试图将整个css文件转换为scss,并想优化这种样式,但是我无法超越:

#add-member-dialog {
  #add-username-to-list {
    .to-list-button-icon:before {
      content: url("../images/func_personplus_16_ena.png");
    }
    &:hover .to-list-button-icon:before {
      content: url("../images/func_personplus_16_hov.png");
    }
    &:disabled .to-list-button-icon:before {
      content: url("../images/func_personplus_16_dis.png");
    }
    &:active .to-list-button-icon:before {
      content: url("../images/func_personplus_16_act.png");
    }
    &:active:hover .to-list-button-icon:before {
      content: url("../images/func_personplus_16_onb.png");
    }
  }
}

有可能做这样的事情吗?

#add-member-dialog {
  #add-username-to-list {
    .to-list-button-icon:before {
      content: url("../images/func_personplus_16_ena.png");

      &&:hover & {
        content: url("../images/func_personplus_16_hov.png");
      }
      ...
    }
  }
}

其中&&将代表祖父选择器#add-username-to-list

我也尝试应用模式#{$grandparent}:tmp $,但是结果选择器看起来像这样:#add-member-dialog #add-username-to-list:tmp #add-member-dialog #add-username-to-list .to-list-button-icon:before

#add-member-dialog {
  #add-username-to-list {
    $grandparent: &;

    .to-list-button-icon:before {
      content: url("../images/func_personplus_16_ena.png");

      #{$grandparent}:hover & {
        content: url("../images/func_personplus_16_hov.png");
      }
      ...
    }
  }
}

任何建议是否可行?

1 个答案:

答案 0 :(得分:1)

您可以使用插值来打印您的祖父母选择器(请注意@ at-root):

#add-member-dialog {
    #add-username-to-list {
        $g: &;                               // grandparent
        $p: '../images/func_personplus_16_'; // icon path
        @at-root {
            .to-list-button-icon:before { 
                #{$g} &          { content: url(#{$p}ena.png); }                
                #{$g}:hover &    { content: url(#{$p}hov.png); }
                #{$g}:disabled & { content: url(#{$p}dis.png); }
                #{$g}:active &   { content: url(#{$p}act.png); }                
                #{$g}:active:hover &   { content: url(#{$p}onb.png); }                                
            }
        }
    }
}