2.50

Circular dependencies in Babel's AMD output

StealJS will hand an empty module {} to a module with circular dependencies while the body of said module is executed.

Babel adds a little helper so non ES6 modules work when imported using the ES6 syntax

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : { default: obj };
}

When empty modules {} are passed to this function, they are wrapped with a default property which makes non-ES6 modules work fine, but it causes a nested default property in circular dependencies that are late bound.

This release of transpile adds a little helper to modules flagged as circular to make sure there are no nested default properties in the module. Each variable holding the module reference returned by _interopRequireDefault is given a setter to fix the default reference.

function _patchCircularDependency(obj) {
  var defaultExport;
  Object.defineProperty(obj.default, 'default', {
    set: function (value) {
      if (obj.default.__esModule) {
        obj.default = value;
      }
     defaultExport = value;
    },
    get: function () {
      return defaultExport;
    }
});