eslint-plugin-flowtype

npm install eslint --save-dev npm install @babel/eslint-parser --save-dev npm install eslint-plugin-flowtype --save-dev Configuration Set parser property to @babel/eslint-parser. Add plugins section and specify eslint-plugin-flowtype as a plugin. Enable rules. { "parser": "@babel/eslint-parser", "plugins": [ "flowtype" ], "rules": { "flowtype/boolean-style": [ 2, "boolean" ], "flowtype/define-flow