only-changed-jest-watch-plugin/example/node_modules/babel-runtime/helpers/temporalRef.js

Jest watch plugin for running either only the modified test (for TDD), or tests of dependant modules

"use strict";

exports.__esModule = true;

exports.default = function (val, name, undef) {
  if (val === undef) {
    throw new ReferenceError(name + " is not defined - temporal dead zone");
  } else {
    return val;
  }
};