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ngcc - support the new spread helper in TS 4.2 #40394

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petebacondarwin opened this issue Jan 11, 2021 · 1 comment
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ngcc - support the new spread helper in TS 4.2 #40394

petebacondarwin opened this issue Jan 11, 2021 · 1 comment
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P3 An issue that is relevant to core functions, but does not impede progress. Important, but not urgent state: has PR type: bug/fix
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Backlog

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@petebacondarwin
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See microsoft/TypeScript#41523
@petebacondarwin petebacondarwin added comp: ngcc P3 An issue that is relevant to core functions, but does not impede progress. Important, but not urgent state: blocked type: bug/fix labels Jan 11, 2021
@ngbot ngbot bot modified the milestone: Backlog Jan 11, 2021
JoostK added a commit to JoostK/angular that referenced this issue Mar 13, 2021
@JoostK
feat(ngcc): support __spreadArray helper as used by TypeScript 4.2
245a7f3 
In TypeScript 4.2 the `__spread` and `__spreadArrays` helpers were both
replaced by the new helper function `__spreadArray` in
microsoft/TypeScript#41523. These helpers may be used in downleveled
JavaScript bundles that ngcc has to process, so ngcc has the ability to
statically detect these helpers and provide evaluation logic for them.
Because Angular is adopting support for TypeScript 4.2 it becomes
possible for libraries to be compiled by TypeScript 4.2 and thus ngcc
has to add support for the `__spreadArray` helper. The deprecated
`__spread` and `__spreadArrays` helpers are not affected by this change.

Closes angular#40394
@JoostK JoostK mentioned this issue Mar 13, 2021
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feat(ngcc): support __spreadArray helper as used by TypeScript 4.2 JoostK/angular
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@petebacondarwin @JoostK