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@facebook-github-bot facebook-github-bot released this May 22, 2019 · 298 commits to master since this release

Likely to cause new Flow errors:

  • The statics of function types used to be any but are now typed as an empty object.
  • Recursive calls of named function expressions were previously unchecked, but are now checked.
  • $call property syntax, deprecated in Flow v0.75, has finally been removed.

Notable bug fixes:

  • Fix an issue where Flow would not catch certain errors involving React function components with unannotated props.
  • Fix React synthetic mouse events for drag, wheel, pointer events to give the specific native event type. (Thanks, @Kiwka!)


  • Improved performance of starting a server from a saved state.


  • Fix parsing of function types inside tuples inside arrow function return types.
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