How to execute an array of synchronous and asynchronous functions in Node.js? Last Updated : 07 Oct, 2021 Comments Improve Suggest changes Like Article Like Report We have an array of functions, some functions will be synchronous and some will be asynchronous. We will learn how to execute all of them in sequence. Input: listOfFunctions = [ () => { console.log("Synchronous Function); }, async () => new Promise(resolve => { setTimeout(() => { resolve(true); console.log("Asynchronous Function); }, 100); }), . . . ] Approach 1: Treat all functions as asynchronous functions and execute them. Because in Javascript, even if you treat a synchronous function as asynchronous function, there is no problem. Example: index.js // this is our list of functions let listOfFunctions = [ () => { console.log("Synchronous Function Called"); }, async () => new Promise(resolve => { setTimeout(() => { console.log("Asynchronous Function Called"); resolve(true); }, 100); }) ] // this function will be responsible // for executing all functions of list let executeListOfFunctions = async(listOfFunctions) => { for(let func of listOfFunctions){ await func(); } } // calling main function executeListOfFunctions(listOfFunctions); Output: Approach 2: The Idea is same but, Implementation is easy in this approach. Example: index.js // this is our list of functions let listOfFunctions = [ () => { console.log("Synchronous Function Called"); }, async () => new Promise(resolve => { setTimeout(() => { console.log("Asynchronous Function Called"); resolve(true); }, 100); }) ] // this function will be responsible // for executing all functions of list let executeListOfFunctions = async(listOfFunctions) => { return Promise.all(listOfFunctions.map(func => func())); } // calling main function executeListOfFunctions(listOfFunctions); Output: Comment More infoAdvertise with us Next Article How to execute an array of synchronous and asynchronous functions in Node.js? P pratikraut0000 Follow Improve Article Tags : Technical Scripter Web Technologies Node.js Technical Scripter 2020 NodeJS-Questions +1 More Similar Reads What are the advantages of synchronous function over asynchronous function in Node.js ? Node.js furnishes us with an inbuilt fs (File System) module for different documents taking care of tasks like reading a record, composing a document, erasing a document, and so on. fs module can be introduced utilizing the underneath explanation: Syntax: npm introduce fs --save Note: The npm in the 5 min read How to Return an Array from Async Function in Node.js ? Asynchronous programming in Node.js is fundamental for handling operations like network requests, file I/O, and database queries without blocking the main thread. One common requirement is to perform multiple asynchronous operations and return their results as an array. This article explores how to 4 min read How to create an Asynchronous function in Javascript? JavaScript is a single-threaded and synchronous language. The code is executed in order one at a time. But Javascript may appear to be asynchronous in some situations. Example: HTML <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <title 6 min read Difference between Synchronous and Asynchronous Method of fs Module Asynchronous fs methods in Node.js do not block the event loop and handle multiple operations concurrently, improving performance while Synchronous fs methods block the event loop until the operation completes, which can lead to inefficiencies and slower performance for I/O-bound tasks. Table of Con 5 min read How to convert an asynchronous function to return a promise in JavaScript ? In this article, we will learn how to convert an asynchronous function to return a promise in JavaScript. Approach:Â You need to first declare a simple function (either a normal function or an arrow function (which is preferred)). You need to create an asynchronous function and then further you need 3 min read How to Write Asynchronous Function for Node.js ? The asynchronous function can be written in Node.js using 'async' preceding the function name. The asynchronous function returns an implicit Promise as a result. The async function helps to write promise-based code asynchronously via the event loop. Async functions will always return a value.Await f 2 min read How to Push Data to Array Asynchronously & Save It in Node.js ? Node.js is a powerful environment for building scalable and efficient applications, and handling asynchronous operations is a key part of its design. A common requirement is to collect data asynchronously and store it in an array, followed by saving this data persistently, for instance, in a databas 7 min read How to chain asynchronous functions in JavaScript ? JavaScript is a single-threaded, asynchronous programming language. Thus, some time-consuming operations like I/O, accessing the database, network calls, etc. are performed asynchronously so that it does not interrupt things in the only JS thread. This can be done by asynchronous code like promises 2 min read How to store JavaScript functions in a queue and execute in that order? In this article, the task is to execute the functions in the order defined in the queue with the help of JavaScript. There are two approaches that are discussed below. Approach 1: Declare the functions and use the array push() method to push the functions in the array. Later traverse the array and e 2 min read How to handle asynchronous operations in Node ? NodeJS, renowned for its asynchronous and event-driven architecture, offers powerful mechanisms for handling asynchronous operations efficiently. Understanding how to manage asynchronous operations is crucial for NodeJS developers to build responsive and scalable applications. What are Asynchronous 2 min read Like