Unhandled JS Exception: Syntax Error

Couldn’t make it work on React Native.

{
  "presets": [
    "es2015",
    "react-native",
    "react-native-stage-0/decorator-support"
  ],
  "plugins": [
    "transform-es2015-parameters",
    ["extensible-destructuring", {"mode": "optout", "impl": "safe"}]
  ]
}

[cooperka]

I started getting this error again as of RN v0.43; I made a PR to improve debug messages: https://github.com/facebook/react-native/pull/13561. You can manually copy the changes there into your node_modules/react-native (at least until the PR is published in the next version) to get a better idea of what’s going wrong.

For me, module.exports is being transformed strangely and the error reason is Unexpected keyword 'var'. This occurs in several places, not just for moment-timezone:

Working bundled code using mode optin:

__d(/* moment-timezone/data/packed/latest.json */function(global, require, module, exports) {
module.exports = module.exports = {
	"version": "2017b",
...

Failing bundled code using mode optout:

__d(/* moment-timezone/data/packed/latest.json */function(global, require, module, exports) {
module.exports = var __extensible_get__ = require("extensible-runtime").immutable;

module.exports = {
	"version": "2017b",
...

I’ll try to diagnose further, but for now I’m just continuing to use mode optin.

[kimown]

Same error, I want to use immutable.js in my RN project .

RN version:0.38.0

I use mode optout, impl immutable in .babelrc , then I start the RN project,

Then I download the bundle file, and rename to index.android.bundle?platform=android.js, and run node index.android.bundle?platform=android.js

@tomaskulich I only know a little about babel plugin, I use babel-plugin-extensible-destructuring in many production projects and these projects are all raect web projects, I really thank you for you work. Today it my first time try to use this plugin in RN project, does this plugin doesn’t work in RN project?