Polyfill-service: Differences between v2 and v3?

[Ugoku]

Type: question

What

We are currently using v2 of polyfill.io, but need to add an extra feature detection and I noticed v3 is current.

• However, I can't find what the differences are. Can I safely use v3 in the same way as v2?
• What happened to features=default ?

Details

URL we currently use: https://cdn.polyfill.io/v2/polyfill.min.js?features=default,fetch,Promise

Additional information

Keep up the good work, this service saves us a lot of headache having to include polyfills ourselves!

[JakeChampion]

Thanks for the kind works :-)

We have a migration guide for moving from v2 to v3 --> https://github.com/Financial-Times/polyfill-service/blob/master/MIGRATION.md#migrating-from-v2-to-v3

features=default still exists.

If you wanted to use the same polyfills with the same settings as v2 but through the v3 api, your URL would be: https://cdn.polyfill.io/v3/polyfill.min.js?features=default,fetch,Promise&unknown=ignore&version=3.25.1

[Ugoku]

Ah thanks, I was looking for changelog.md and completely missed MIGRATION.md.

Thanks for your fast and clear response!