New REPL doesn't include regenerator runtime

While the new REPL does include transform-regenerator, it doesn’t use the regenerator runtime to be able to run async functions and generators:

(async () => {})()

outputs the following:

"use strict";

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

_asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
  return regeneratorRuntime.wrap(function _callee$(_context) {
    while (1) {
      switch (_context.prev = _context.next) {
        case 0:
        case "end":
          return _context.stop();
      }
    }
  }, _callee, undefined);
}))();

which throws:

regeneratorRuntime is not defined

This works fine in the old REPL.

[bvaughn]

I think a better solution would be to just load the runtime polyfill directly into the iframe we’re evaling in. I’ll look into making this change soon. 😄

[bvaughn]

We lazy-load babel-polyfill (which includes the regenerator runtime) if you check “Evaluate”.

Or at least we are supposed to. This worked at some point 😅 I’ll look into it.