Add support of MDN database

[socketpair]

I mean:
https://github.com/mdn/browser-compat-data

Another example:
https://github.com/webhintio/hint

I want browserlists to be able to query browsers by expressions like supports mdn-javascript_builtins_promise_allsettled.

Unfortunately, current DB does not support such detailed requests.

[ai]

Do we have this file in caniuse-db npm package?

[socketpair]

@ai No, you don't have:

$ find | fgrep -i promi
./features-json/promise-finally.json
./features-json/promises.json

[socketpair]

https://caniuse.com/#feat=mdn-javascript_builtins_promise_allsettled

original caniuse link

[ai]

Can you create an issue in Can I Use to add this data. I can't do anything without the data source (and losing data by HTTP is not an option for me because of the security risks).

[socketpair]

Yes I can... but....there are plenty of other features. Seems caniuse guys simply just do not add detailed information.

https://caniuse.com/#feat=mdn-javascript_builtins_object_fromentries

Is another feature I want to use.

That's why I'm asking you to support the MDN database.

[ai]

That's why I'm asking you to support the MDN database.

How do you see this support implementation?

[socketpair]

Ummm. Instead of adding, they just refer to MDN database....I think browserslist must support this DB as well.

[socketpair]

@ai
Browserslist query language should match features from this DB. MDN db has an API.

[ai]

To support any database we need an npm package with data from that database. This npm package should be auto-updated to be sure that the data is always actual.

Do you want to create a npm package with MDN data or try to find any official package?

[socketpair]

Well. It's the official package...

https://caniuse.com/#feat=mdn-javascript_builtins_object_fromentries

(click on the place like one in the picture)

This is an example of description method I want:

https://github.com/mdn/browser-compat-data/blob/master/javascript/builtins/Object.json#L600

You should not use these files directly of course. There is an API.

[ai]

It's official package

You show a screenshot from website or GitHub repo, but it is not a npm package.

Browserslist can't load data from websites. Browserslist users Can I Use data because they publish this data in caniuse-db npm package.

Can you create an issue in MDN repo to release that data on npm?

[socketpair]

https://www.npmjs.com/package/mdn-browser-compat-data

[ai]

Great. Can you send PR?

[socketpair]

Sorry, no. It's too hard for me to integrate all these things.

[socketpair]

mdn/browser-compat-data#4106

[chaffeqa]

this integration woudl be 🔥 !

like socketpair, i wish i had time to help here :(

[karlhorky]

@jonathantneal @antross did either of you get further with your solution approaches from #379 ?