@wordpress/redux-routine/build-module/is-generator.js

Redux middleware for generator coroutines.

/* eslint-disable jsdoc/valid-types */
/**
 * Returns true if the given object is a generator, or false otherwise.
 *
 * @see https://www.ecma-international.org/ecma-262/6.0/#sec-generator-objects
 *
 * @param {any} object Object to test.
 *
 * @return {object is Generator} Whether object is a generator.
 */
export default function isGenerator(object) {
  /* eslint-enable jsdoc/valid-types */
  // Check that iterator (next) and iterable (Symbol.iterator) interfaces are satisfied.
  // These checks seem to be compatible with several generator helpers as well as the native implementation.
  return !!object && typeof object[Symbol.iterator] === 'function' && typeof object.next === 'function';
}
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