ember-cli-typescript

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Which package(s) does this problem pertain to?

• [x] @types/ember__array

Enumerable.filterBy (and possibly all other methods that are marked to return NativeArray<T>) doesn't actually return a NativeArray but rather a native JavaScript array. It's as simple as typing:

import { A } from '@ember/array';

const result = A().filterBy('foobar').mapBy('foobar');

This type-checks fine but at runtime blows up because filterBy doesn't return something that has a mapBy method.

Thank you! I'll see if I can land a fix this week!

Resolved by publishing types from Ember itself. (It's also possible this got fixed incidentally on DT at some point!)