An Asynchronous for-each for JavaScript and Typescript

asyncForEach.js

/**
 * 
 * Asyncronously iterate over an array
 * @example
 * var array = [1,2,3];
 * console.log(`This is just the beginning!`);
 * await asyncForEach(array, function (element) {
 *  console.log(`Iterating ${element}`);
 * });
 * console.log(`Done!`);
 * @param {Array.<any>} input - The input array in which to iterate over.
 * @param {any} next - The callback function to execute on each array element.
 * @returns {Promise<void>} Thenable/Awaitable void return
 */
async function asyncForEach(input, next) {
  for (var i = 0;i < input.length;i++) {
    await next(input[i], i, input);
  }
}

asyncForEach.ts

/**
 * 
 * Asyncronously iterate over an array
 * @example
 * const array: number[] = [1,2,3];
 * console.log(`This is just the beginning!`);
 * await asyncForEach(array, (element: number) => {
 *  console.log(`Iterating ${element}`);
 * });
 * console.log(`Done!`);
 * @param {Array.<any>} input - The input array in which to iterate over.
 * @param {any} next - The callback function to execute on each array element.
 * @returns {Promise<void>} Thenable/Awaitable void return
 */
const asyncForEach = async (input: any[], next: any): Promise<void> => {
  for (let i = 0;i < input.length;i++) {
    await next(input[i], i, input);
  }
}

A very handy asynchronous for-each iterator for Typescript and JavaScript.

Shamelessly adopted from Sebastien Chopin's article