Global variable is not defined in babel 6 / webpack 3

[lerayne]

I'm using babel v6.26.3 and webpack 3.12.0

If I call regenerrator-runtime as import 'regenerator-runtime/runtime' to define a global variable the code results to be
START

/***/ "./node_modules/regenerator-runtime/runtime.js":
/***/ (function(module, exports, __webpack_require__) {

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

var regeneratorRuntime = (function (exports) {
  "use strict";

  var Op = Object.prototype;

END

  // Regardless of whether this script is executing as a CommonJS module
  // or not, return the runtime object so that we can declare the variable
  // regeneratorRuntime in the outer scope, which allows this module to be
  // injected easily by `bin/regenerator --include-runtime script.js`.
  return exports;

}(
  // If this script is executing as a CommonJS module, use module.exports
  // as the regeneratorRuntime namespace. Otherwise create a new empty
  // object. Either way, the resulting object will be used to initialize
  // the regeneratorRuntime variable at the top of this file.
   true ? module.exports : {}
));


/***/ }),

Which means "regeneratorRuntime" is never registered as a global variable and the code stops to work.

This is happening in 0.13.1, I moved to 0.12.1 and everything is working fine there.

[benjamn]

See #353. With [email protected], the global regeneratorRuntime variable is no longer automatically created (unless you evaluate the runtime code in global scope, rather than a Webpack wrapper), but you can import the runtime and define the variable globally yourself.

This is all handled for you if you use @babel/plugin-transform-runtime, by the way. Any file that needs regeneratorRuntime imports it from @babel/runtime/regenerator.

[lerayne]

Then probably this readme file should be changed accordingly: https://github.com/facebook/regenerator/blob/master/packages/regenerator-runtime/README.md

It also goes to npm page of the regenerator-runtime and gets people like me confused

[mattjohnsonpint]

This appears to also breaks Jest tests. Per these docs, one is supposed to add regenerator-runtime (not @babel/plugin-transform-runtime), but it expects regeneratorRuntime to be on the global scope.

Tests fail with ReferenceError: regeneratorRuntime is not defined after updating regenerator-runtime to 0.13.1.

Tried with both Jest version 23.6.0 and 24.0.0-alpha.9.

[vincro]

Tried with both Jest version 23.6.0 and 24.0.0-alpha.9.

Per chance, did you happen to figure out a fix for this besides a downgrade?

Thanks.

[mattjohnsonpint]

@vincro - nope. I've set "regenerator-runtime": "0.12.1" in my package.json for now.

[xjamundx]

Ouch, yeah many outdated docs on this in the world. Just got bit.