{ "presets": [ "react", [ "env", { "exclude": ["transform-async-to-generator", "transform-regenerator"], "loose": true, "modules": false, "targets": { "browsers": ["last 2 versions", "IE >= 11", "iOS >= 9"] } } ] ], "plugins": [ "syntax-dynamic-import", ["transform-object-rest-spread", { "useBuiltIns": true }], "transform-decorators-legacy", "transform-class-properties", [ "react-intl", { "messagesDir": "./build/messages" } ], "preval" ], "env": { "development": { "plugins": [ "transform-react-jsx-source", "transform-react-jsx-self" ] }, "production": { "plugins": [ "lodash", [ "transform-react-remove-prop-types", { "mode": "remove", "removeImport": true, "additionalLibraries": [ "react-immutable-proptypes" ] } ], "transform-react-inline-elements", [ "transform-runtime", { "helpers": true, "polyfill": false, "regenerator": false } ] ] }, "test": { "plugins": [ "transform-es2015-modules-commonjs" ] } } }