List of browser versions where this polyfill is NOT needed

[sijakret]

Hi all,

my understanding is that this polyfill (suite) is not needed at all in most up-to-date browsers.
Is there some sort of overview that has this information?

Something along the lines of

• Chrome >= 70 => not needed
• Safari >= 12 => not needed
• Firefox ..
• Edge ..

This would be very helpful.

Background: I feel many projects include the polyfills even though they don't need it at all since people are afraid they might be breaking things..

Regards
Jan

[romainmenke]

see : https://github.com/mrhenry/core-web/blob/main/packages/core-web-generator/src/custom-polyfills/generate-webcomponents.ts#L279

This file contains mappings of different features and browsers that require the polyfill.

[sijakret]

thanks a lot!
However, to me this looks like safari pulls in ALL of them, or am i reading it the wrong way!?

[romainmenke]

However, to me this looks like safari pulls in ALL of them, or am i reading it the wrong way!?

Which line(s) make it look that way?

[romainmenke]

Double checked and there are indeed still some with safari: *
These I haven't figured out how to test and verify if they are needed.

These are features I don't personally use.

If you now how to test and detect them you could add a feature test here :
https://github.com/mrhenry/web-tests

For example : https://github.com/mrhenry/web-tests/blob/main/specifications/whatwg/html/4.13.4.customElements.define/test.pure.js

After a few days the tests results should show which browsers require the polyfill.

[stale]

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