mdn / mdn/data

Status of dropped-during-experimental-phase elements

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Description

It's quite often that CSS proposals changes, and experimental elements disappear or get replaced.

For example, motion was dropped in favor of offset: https://github.com/mdn/data/issues/314

I also noticed both block-overflow and overflow-block exists in https://github.com/mdn/data/blob/master/css/properties.json. The current spec is using overflow-block, so I guess block-overflow was dropped in favor of it.

Can these properties be removed from the data? If not, I think currently there is no good status for them. Both deprecated and obsolete indicate the property was once supported in the browser.

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First steps

  1. Read the whole issue, then the project's contributing guide.
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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the block-overflow and overflow-block entries in css/properties.json, then compare them with the linked MDN specification and the related mdn/data#314 issue. Determine how dropped or replaced experimental properties should be represented; the work is done when these entries consistently reflect the project’s chosen status or removal policy.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
web-dev
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
55/100

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