Please add support for apply rule

[JosefJezek]

Could you add support for apply rule, check out this links?

• https://github.com/pascalduez/postcss-apply
• https://www.polymer-project.org/1.0/docs/devguide/styling.html#custom-css-mixins

.Navigation {
@nest &--menu {
    --paper-menu-selected-item: {
      color: var(--accent-color);
    };
  }
}

This plugin remove semicolon on end of custom property set... :-(

.Navigation--menu {
    --paper-menu-selected-item: {
      color: var(--accent-color);
    }
  }

------------^

Check out the PSK+
https://github.com/StartPolymer/polymer-starter-kit-plus

[jonathantneal]

This may be resolved by PostCSS 6, but otherwise, I cannot patch @apply rules. I will update to PostCSS shortly.

[jonathantneal]

I can confirm

PostCSS 5.0 could parse it pretty well, but in some cases, it lost the semicolon after a mixin definition.