I came across this while upgrading from RN 0.56 to 0.59 and figured i'd share.
Failed to load bundle(http://localhost:8081/src/index.bundle?platform=ios) with error:(Unable to resolve module babel-runtime/helpers/classCallCheck from /node_modules/emoji-mart-native/dist/utils/emoji-index/nimble-emoji-index.js: Module babel-runtime/helpers/classCallCheck does not exist in the Haste module map
I came across this while upgrading from RN 0.56 to 0.59 and figured i'd share.
Failed to load bundle(http://localhost:8081/src/index.bundle?platform=ios) with error:(Unable to resolve module
babel-runtime/helpers/classCallCheckfrom/node_modules/emoji-mart-native/dist/utils/emoji-index/nimble-emoji-index.js: Modulebabel-runtime/helpers/classCallCheckdoes not exist in the Haste module mapCame across something similar here https://github.com/babel/babel/issues/1872 and so running this fixed the issue. $ npm install --save babel-runtime --save