Error handler for React Native

ErrorUtils.js

import StackTrace from 'stacktrace-js'
const Fabric = require('react-native-fabric')
const { Crashlytics } = Fabric

// call this to start capturing any no-handled errors
exports.init = function () {
  const originalHandler = global.ErrorUtils.getGlobalHandler()
  function errorHandler (e) {
    exports.issue(e)
    if (originalHandler) {
      originalHandler(e)
    }
  }
  global.ErrorUtils.setGlobalHandler(errorHandler)
}

exports.issue = function (e) {
  StackTrace.fromError(e, {offline: true}).then((stack) => {
    stack = stack.map(row => {
      let {source, lineNumber} = row
      return {fileName: e.message, lineNumber: lineNumber || 0, functionName: source}
    })
    Crashlytics.recordCustomExceptionName(e.message, e.message, stack)
  })
}