Support for CSS @apply Rule - Error: no writecb in Transform class

[JosefJezek]

How to resolve this error? We need for Polymer Themes.

• http://tabatkins.github.io/specs/css-apply-rule/
• https://www.polymer-project.org/1.0/docs/devguide/styling.html#custom-css-mixins
• https://github.com/StartPolymer/polymer-starter-kit-plus

I define mixin using @apply rule for <paper-menu> element.

.navigation {
  --paper-menu-selected-item: {
    color: var(--default-primary-color);
  };
}

-> Error: no writecb in Transform class

Thank you

[MoOx]

@apply is not yet supported yet in cssnext. We need to upgrade to postcss v5 since https://github.com/pascalduez/postcss-apply need v5 parser.
Closing in favor of #203

[JosefJezek]

@apply rule is implemented in Polymer using JS. How to pass or ignore this error by parse css?

• https://www.polymer-project.org/1.0/docs/devguide/styling.html#custom-css-mixins

[MoOx]

You need to wait for #202 for now which is blocked by iamvdo/pleeease-filters#12

[zliebersbach]

I've still got the issue with the latest version.. Any updates on resolving this?