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It does. Using the Web Locks API page as an example, let's say we want to know when `LockManager` was added to Chrome. Here are the steps: 1. View the page: h

It does. Using the Web Locks API page as an example, let's say we want to know when `LockManager` was added to Chrome. Here are the steps: 1. View the page: https://developer.mozilla.org/en-US/docs/Web/API/Web_Locks_API https://developer.mozilla.org/en-US/docs/Web/API/Web_Locks_A... 2. Scroll down to the Browser compatibility table 3. Find the cell you're interested in, in this example we're looking at where the `LockManager` row meets the Chrome column. 4. We see a check and a version number (in this case 69). So at this point we know that it has existed since version 69. Now in the case that we don't know that Chrome's current version is already < 100 and we need to know when a feature gained support: 5. Click on the cell to view the timeline of that cell. Now we know that it was released on 2018-09-04, and it never had a smaller release requiring browser flags/prefixes/experiment flags/etc...

simonw 2y ago
I honestly never thought to click on those! Thanks very much. Now I'm digging around in https://github.com/mdn/browser-compat-data/blob/main/api/LockManager.json https://github.com/mdn/browser-compat-data/blob/main/api/Loc... and trying to find the browser release dates data... Ooh, https://bcd.developer.mozilla.org/bcd/api/v0/current/api.Lock.json https://bcd.developer.mozilla.org/bcd/api/v0/current/api.Loc... is even better - it expands those browser dates and it's served with access-control-allow-origin: *
- simonw 2y ago
  I used that to build this tool: https://tools.simonwillison.net/mdn-timelines#Lock https://tools.simonwillison.net/mdn-timelines#Lock It lets you search for an API and then displays a timeline. Details on how I built it here: https://github.com/simonw/tools/commit/59323c6a30271c856aabb7456ae24f071f35d8ac#commitcomment-148934796 https://github.com/simonw/tools/commit/59323c6a30271c856aabb... and https://github.com/simonw/tools/commit/472b46fda02e912c436041fda75fc2a6565462b4 https://github.com/simonw/tools/commit/472b46fda02e912c43604...
  - simonw 2y ago
    Blogged about it here: https://simonwillison.net/2024/Nov/11/mdn-browser-support-timelines/ https://simonwillison.net/2024/Nov/11/mdn-browser-support-ti...
    - fragmede 2y ago
      thank you for posting transcripts!
      - simonw 2y ago
        I do that a lot: most of the commits in that tools repo (which doubles as my "playing around with LLM generated code" repo) include links to the relevant conversations: https://github.com/simonw/tools/commits/main/ https://github.com/simonw/tools/commits/main/
  - chrismorgan 2y ago
    See also https://caniuse.com/mdn-api_lock https://caniuse.com/mdn-api_lock, “Date relative” view is mostly better.

simonw 2y ago

I honestly never thought to click on those! Thanks very much. Now I'm digging around in https://github.com/mdn/browser-compat-data/blob/main/api/LockManager.json https://github.com/mdn/browser-compat-data/blob/main/api/Loc... and trying to find the browser release dates data... Ooh, https://bcd.developer.mozilla.org/bcd/api/v0/current/api.Lock.json https://bcd.developer.mozilla.org/bcd/api/v0/current/api.Loc... is even better - it expands those browser dates and it's served with access-control-allow-origin: *

simonw 2y ago
I used that to build this tool: https://tools.simonwillison.net/mdn-timelines#Lock https://tools.simonwillison.net/mdn-timelines#Lock It lets you search for an API and then displays a timeline. Details on how I built it here: https://github.com/simonw/tools/commit/59323c6a30271c856aabb7456ae24f071f35d8ac#commitcomment-148934796 https://github.com/simonw/tools/commit/59323c6a30271c856aabb... and https://github.com/simonw/tools/commit/472b46fda02e912c436041fda75fc2a6565462b4 https://github.com/simonw/tools/commit/472b46fda02e912c43604...
- simonw 2y ago
  Blogged about it here: https://simonwillison.net/2024/Nov/11/mdn-browser-support-timelines/ https://simonwillison.net/2024/Nov/11/mdn-browser-support-ti...
  - fragmede 2y ago
    thank you for posting transcripts!
    - simonw 2y ago
      I do that a lot: most of the commits in that tools repo (which doubles as my "playing around with LLM generated code" repo) include links to the relevant conversations: https://github.com/simonw/tools/commits/main/ https://github.com/simonw/tools/commits/main/
- chrismorgan 2y ago
  See also https://caniuse.com/mdn-api_lock https://caniuse.com/mdn-api_lock, “Date relative” view is mostly better.