flow

A static type checker for JavaScript. More information: https://flow.org/en/docs/cli/.

• Run a flow check:

flow

• Check which files are being checked by flow:

flow ls

• Run a type coverage check on all files in a directory:

flow batch-coverage --show-all --strip-root {{path/to/directory}}

• Display line-by-line type coverage stats:

flow coverage --color {{path/to/file.jsx}}