new Event() and new CustomEvent() don't work in older versions of IE.
The above link provides a solution and there's also custom-event-polyfill.
Are there any plans to add this to core-js/babel-polyfill?
web standards
ajbowler
👍8
All 3 comments
Generally Babel and core-js focus on polyfilling language-standard functionality. Polyfilling features from other specifications isn't something they look to handle for you.
loganfsmyth
on 9 Nov 2017
👍4
At this moment, only ECMAScript and closely related ECMAScript features in the scope of core-js. In the future, this position can be changed, but not soon.
zloirock
on 8 Dec 2017
That makes sense, thanks for your consideration at least!
ajbowler
on 9 Dec 2017
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Most helpful comment
Generally Babel and core-js focus on polyfilling language-standard functionality. Polyfilling features from other specifications isn't something they look to handle for you.