angular-docs-cn/aio/src/styles/2-modules/api-symbols/_api-symbols-theme.scss

@use 'sass:map';
@use '../../constants';

@mixin theme($theme) {
  .symbol {
    box-shadow: 0 1px 2px rgba(constants.$black, 0.24);
    color: constants.$white;

    // SYMBOL TYPES
    // Symbol mapping variables in *constants*
    @each $name, $symbol in constants.$api-symbols {
      &.#{$name} {
        background: map.get($symbol, background);

        &:before {
          content: map.get($symbol, content);
        }
      }
    }
  }
}