`css.types.easing-function` - Missing many keyword values

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

There are several timing function keyword values not (or poorly) represented in the css.types.easing-function tree.

What browsers does this problem apply to, if applicable?

All of them.

What did you expect to see?

Discrete entries for:

• linear
• ease
• ease-in
• ease-out
• ease-in-out
• step-start
• step-end

Did you test this? If so, how?

I used the demo in https://developer.mozilla.org/en-US/docs/Web/CSS/transition-timing-function. They work in more than one contemporary browser. But the gist here is that it's a lot of data that's missing.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

Found in the course of https://github.com/web-platform-dx/web-features/pull/1812.

Do you have anything more you want to share?

No response

MDN URL

No response

MDN metadata

No response

Start at the css.types.easing-function tree and compare its existing entries with the timing-function values listed in the issue. Use the MDN transition-timing-function demo and the referenced web-platform-dx pull request for verification; done means discrete entries exist for all seven named keywords.