Flow
Get Started
Never used a type system before or just new to Flow? Get up and running in a few minutes.
Flow for TypeScript Users
Coming from TypeScript? What transfers cleanly, what looks the same but behaves differently, and what only Flow has.
Language Guide
Types, narrowing, generics, enums, match expressions, and the full type system.
React
Component syntax, hooks, render types, events, refs, and advanced React patterns.
Linting
Configure lint rules, flowlint comments, and strict import/export checks.
Tooling
Editor integration, Babel, Prettier, ESLint, and flow-remove-types.
Reference
.flowconfig options, CLI commands, Flow Strict, and library definitions.
FAQ
Have a question about using Flow? Check here first!
© 2013–present Facebook Inc.
Licensed under the MIT License.
https://flow.org/en/docs/
