facebook/flow v0.103.0

on GitHub

New Features:

• Added --types flag to flow cycle, when given only type dependencies are used to compute cycles

Notable bug fixes:

• Fixed a bug when destructuring unions gave spurious errors [example]
• Updated for-in/for-of head expressions to be evaluated in the correct scope [example]

Performance:

• Improved the calculation for what are dependents of a file, reducing work during rechecks

Library definitions:

• Added support for Array#flatMap (thanks @goodmind)
• Replaced usages of Object and Function (which are aliases for any) in library definitions with any
• Removed some usages of any from library definitions
• Updated Function#apply to accept strictly two arguments (thanks @goodmind)
• Added SpeechSynthesis definitions (thanks @goodmind)

Misc:

• Updated/added HTML spec URLs in comments (thanks @kevinSuttle)
• Fixed parsing of anonymous class implements clause (thanks @goodmind)
• Added support for printing mixins and implements (thanks @goodmind)