Editors

Flow's editor integration is provided through the Language Server Protocol (LSP). The flow lsp command starts Flow as an LSP server, so any editor with an LSP client can connect to it for diagnostics, autocomplete, go-to-definition, hover types, code actions, and more.

Visual Studio Code

The officially maintained extension is Flow Language Support. Install it from the VS Code extensions panel or the Marketplace.

Other editors

Any editor with LSP support can be configured to use Flow by pointing its LSP client at flow lsp. Consult your editor or LSP plugin's documentation for setup details.