[0.19][ios]Error 'babelHelpers.typeof is not a function' running examples UIExplorer

[asd123freedom]

The project I inited before run normally. But the example cloned from react-native of github could not works. I followed the steps in README, and I find out one module require babel@5.8.29 when I run 'npm install'.
I assume that the error occurs because of the version of babel. But I can not solve the problem by install latest version of babel.

[facebook-github-bot]

Hey asd123freedom, thanks for reporting this issue!

React Native, as you've probably heard, is getting really popular and truth is we're getting a bit overwhelmed by the activity surrounding it. There are just too many issues for us to manage properly.

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[gijoehosaphat]

@asd123freedom I also got this upon upgrading. I tried clearing babel cache and the react native packager cache. It wasn't until I literally rebooted that it was resolved.

Not the most concrete solution I understand, but this is eventually what solved it for me. I suspect there was something being cached somewhere in $TMP but couldn't track it down.

[asd123freedom]

@gijoehosaphat Thanks a lot. I will try it as soon as possible. By the way, the way of cleaning cache is remove related files in '/tmp', isn't it?

[skevy]

@asd123freedom @gijoehosaphat the best way to make sure the packager cache is cleared is by doing:

$ watchman watch-del-all
$ [packager command] --reset-cache

[niftylettuce]

For me, the fix was getting rid of es2015 as a preset in my .babelrc file, thanks @skevy

[bestander]

@gijoehosaphat was the problem solved?

[gijoehosaphat]

I ended up not having to change any code in the project, and continue to use stage-0, es2015 and react babel presets. I believe it was just cache causing a conflict.

[bestander]

cc @asd123freedom good to close?

[asd123freedom]

@bestander Because of Chinese new year I am in a vacation not having my mac aside. I will try the solution @gijoehosaphat suggested when I come back from vacation. So it's good to close. Thanks a lot.

[bestander]

👍 reopen if it is still an issue

[mikepugh]

I'm now running into this issue with v0.19.0, so I tried upgrading to v0.20.0 but I still run into the issue.

Newly init'd projects work fine, but a project I started about a week ago is broken. I've tried all of the above suggestions with no luck.

This morning I've done the following:
rm -rf node_modules/
watchman watch-del-all
npm cache clean
I then removed all dev and regular dependencies from package.json except for react-native@0.20.0
npm install
react-native run-ios

And it still comes up with the undefined babelHelpers.typeof exception.

I was able to take my application specific code and basically dump that into a newly init'd project and it runs fine. I'd still like to know why my original repo is hosed though, and fix if possible.

[bestander]

what does your package.json look like?

[mikepugh]

I took it down to its bare minimum, trying to replicate a fresh react-native init.

{
  "name": "testApp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",    
  },
  "dependencies": {
    "react-native": "0.20.0"    
  }
}

Previously there was more (See below), but I spent several hours adding and removing package dependencies to try and figure out if one of them was the problem. One step I did take last night was to react-native init a new app, and then one by one add the dependencies seen below and after each one I ran the simulator. I was able to get my app running in the simulator this way, so I'm at a loss for what might be the root cause in my original repo folder.

{
  "name": "testApp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "remotedev": "remotedev --hostname=localhost --port=8000",
    "test": "mocha --compilers js:babel-register --require  ./test/test_helper.js --require babel-polyfill --recursive || true"
  },
  "dependencies": {
    "firebase": "2.4.0",
    "geofire": "3.2.4",
    "history": "2.0.0",
    "immutable": "3.7.6",
    "ramda": "0.19.1",
    "react-addons-pure-render-mixin": "0.14.7",
    "react-native": "0.20.0",
    "react-native-drawer": "1.15.0",
    "react-native-geocoder": "0.3.1",
    "react-native-maps": "0.3.0",
    "react-native-router-flux": "2.2.0",
    "react-redux": "4.4.0",
    "redux": "3.3.1",
    "redux-saga": "0.7.0",
    "redux-thunk": "1.0.3",
    "reselect": "2.0.3"
  },
  "jscsConfig": {
    "maximumLineLength": null
  },
  "devDependencies": {
    "babel-cli": "6.5.1",
    "babel-plugin-transform-regenerator": "6.5.2",
    "babel-polyfill": "6.5.0",
    "babel-preset-es2015": "6.5.0",
    "babel-register": "6.5.2",
    "chai": "3.5.0",
    "chai-immutable": "1.5.3",
    "mocha": "2.4.5",
    "remote-redux-devtools": "0.1.2",
    "remotedev-server": "0.0.3"
  }
}

[Kureev]

@mikepugh

$ npm cache clean

is something different from

[packager command] --reset-cache

Try to run

$ ./node_modules/react-native/packager/packager.sh start --resetCache

from your application folder first.

UPD: Also, I'd like to see your .babelrc file. If you're using 0.20.0, there are some fixes you probably should make.