12345678910111213141516171819

/** * @name isUndefined * @summary Tests for a `undefined` values. * @description * Checks to see if the input value is `undefined`. * @example * <BR> * * ```javascript * import { isUndefined } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts'; * * console.log('isUndefined', isUndefined(void(0))); // => true * ``` */export function isUndefined (value?: unknown): value is undefined {  return value === undefined;}