To Flow's credit, their language server does provide IDE features: https://github.com/flowtype/flow-language-server#supported-features https://github.com/flowt

To Flow's credit, their language server does provide IDE features: https://github.com/flowtype/flow-language-server#supported-features https://github.com/flowtype/flow-language-server#supported-f... I still have found TypeScript to be an overall more pleasant developer experience, though.