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fix(48556): never cannot be spread into object, but it can be spread into JSX props #48570

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merged 1 commit into from
Apr 21, 2022

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a-tarasyuk
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Fixes #48556

@typescript-bot typescript-bot added the For Backlog Bug PRs that fix a backlog bug label Apr 5, 2022
@sandersn sandersn added this to Not started in PR Backlog Apr 21, 2022
PR Backlog automation moved this from Not started to Needs merge Apr 21, 2022
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I think this is right, but while I'm looking at it, it's kind of strange that object literals return errorType whereas JSX literals try to build up typeToIntersect as a place to hold non-spreadable types. I would think that both kinds of literals would behave the same.

@sandersn sandersn merged commit d71dd1d into microsoft:main Apr 21, 2022
PR Backlog automation moved this from Needs merge to Done Apr 21, 2022
Jack-Works pushed a commit to Jack-Works/TypeScript that referenced this pull request Apr 22, 2022
@DanielRosenwasser DanielRosenwasser added the Breaking Change Would introduce errors in existing code label Apr 26, 2022
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This breaks spreading unknown and never into a JSX element. Users may now see

Spread types may only be created from object types.

In JSX spreads.

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nandorojo commented May 25, 2022

Can you still spread a nullable object onto JSX/objects?

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I believe so

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never cannot be spread into object, but it can be spread into JSX props
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