[cdk]: overlay styles unavailable

[willshowell]

Bug, feature request, or proposal:

Request (for tracking purposes)

Context

#6100

@jelbourn:

I plan on adding a overlay-prebuilt.scss in a follow-up PR

Other

While it looks like all of a11y is re-exported in the material bundle, cdk-a11y() doesn't seem to be a part of the cdk

https://github.com/angular/material2/blob/master/src/lib/core/a11y/_a11y.scss

cc @devversion

[devversion]

@willshowell Good point. That should be something very important for CDK standalone usage.

[jelbourn]

Yep, I forgot. @devversion could you take this? I probably won't have time this week.

[devversion]

@jelbourn Sure, I should be able to implement it similar as for the material package. Do we want to have multiple SCSS files for the different secondary entry-points? e.g.

• _overlay.scss
• _a11y.scss

[jelbourn]

@devversion for anything w/ styles, we want a partial (e.g., _overlay.scss) and a concrete file (e.g. overlay-prebuilt.scss).

[jelbourn]

Also worth mentioning that we don't want to call the concrete file overlay.scss because it would make imports from client scss ambiguous

[devversion]

See: #7204

[willshowell]

closing via #7204

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