facebook/flow v0.122.0

on GitHub

Likely to cause new Flow errors:

• Moved react-dom modules out of built-in libdefs. They are now available on flow-typed.

  To install the libdefs, run flow-typed install --flow-version=0.122.0 react-dom@16.13.0

  This diff is necessary to allow React to make breaking changes to react-dom without force-pinning Flow users to the latest version of react-dom.

• Fixed an unsoundness in union and intersection spreads

• Improved object spread-related error messages, which may cause suppressed errors to become unsuppressed because they moved to better locations

Improved Editor Integration:

• Removed completion of function param snippets. Before, f<tab> might complete foo(aParam), which is problematic if you don't want to call the function. Now it just completes foo. These snippets are further obviated by signature help, which appears when you type (.
• Improved accuracy of "Did You Mean?" Quick Fixes for object property type errors
• Added support for Go to Definition on export-from declarations (export { HERE } from ...)
• Fixed tracking of open files in LSP clients which could cause stale errors in the IDE

Misc:

• Added HTMLUnknownElement and support for custom elements to document.createElement (thanks @YevhenKap!)
• Fixed --saved-state-no-fallback flag so that Flow exits when saved state is not found
• Fixed an issue where an invalid package.json would prevent generating saved state
• Fixed a potential deadlock when communicating with Watchman
• Fixed types-first signatures for CJS requires introduced with var
• Enabling experimental.types_first now implies experimental.well_formed_exports

Parser:

• Renamed RestProperty to RestElement to match estree
• Changed 'for await' nodes from ForAwaitStatement to ForOf with await: true to match estree