javascript - 如何设置:before psudo property for a group of css styles

Question

如何为一组 css 样式设置 :before psudo 属性，

.two-row-two-column mat-grid-tile:nth-of-type(3) .serveroutput-pop, 
  .two-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop,
  .two-row-three-column mat-grid-tile:nth-of-type(2) .serveroutput-pop,
  .one-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop  {
      left: -397px;
      right: auto;
  }

我期望的代码是这样的

 (.two-row-two-column mat-grid-tile:nth-of-type(3) .serveroutput-pop, 
  .two-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop,
  .two-row-three-column mat-grid-tile:nth-of-type(2) .serveroutput-pop,
  .one-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop)::before  {
      left: -458px;
      right: auto;
  }

Answer 1

您可以像这样为每一行添加 before。所以它正常工作

.two-row-two-column mat-grid-tile:nth-of-type(3) .serveroutput-pop::before, 
.two-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop::before,
.two-row-three-column mat-grid-tile:nth-of-type(2) .serveroutput-pop::before,
.one-row-two-column mat-grid-tile:nth-of-type(1) .serveroutput-pop::before  {
      left: -397px;
      right: auto;
  }