facebook/flow v0.104.0

on GitHub

Likely to cause new Flow errors:

• Fixed the definition of Function.prototype.apply to only accept array-like objects, not any iterable.
• Improved error positioning, which may cause previously-suppressed errors to become unsuppressed.

New Features:

• non-array-spread lint rule: Fires when a non-array iterable is spread. This is useful for modeling the loose: true mode of @babel/plugin-transform-spread, where such code causes a runtime error.

Notable Bug Fixes:

• Fixed a performance regression when computing dependencies in large projects
• Fixed built-in library definitions that needed to be explicitly inexact to pass the implicit-inexact-object linter.
• Improved libdefs for many browser APIs (e.g. Media Streams, MIDI, Permissions, Workers) (#7737, #7805, #7806, thanks @goodmind!)

Misc:

• Various improvements to the types-first signature generator
• Improved the name of the server master process in ps
• Improved the output of flow check --profile

flow-remove-types:

• Remove opaque types and declare export

Parser:

• Fixed a bug allowing await to be a parameter in async functions
• Several improvements to the experimental comment attachment algorithm