---
title: "Discussion on \"Async Code in Node.js: Callbacks and Promises\" | Hashnode"
description: "Discussion on \"Async Code in Node.js: Callbacks and Promises\". Node.js is built to never wait. Understanding how it handles async work is the key to writing good server-side JavaScript.\n\n\nWhy Async Code Exists in Node.js\nNode.js runs on a single thread. That mean"
url: "https://hashnode.com/posts/async-code-in-node-js-callbacks-and-promises/69e6fd4ec9501dd01073cc4e"
---

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# [Async Code in Node.js: Callbacks and Promises](https://web-dev-articles.hashnode.dev/async-code-in-node-js-callbacks-and-promises?utm_source=hashnode&utm_medium=feed)

Node.js is built to never wait. Understanding how it handles async work is the key to writing good server-side JavaScript. Why Async Code Exists in Node.js Node.js runs on a single thread. That mean

Apr 21 · 11 min read · web-dev-articles.hashnode.dev  
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-   [#javascript-promises](https://hashnode.com/tag/javascript-promises)
-   [#javascript-callback-functions](https://hashnode.com/tag/javascript-callback-functions)

## Written by

[Prafull Chaudhari](https://hashnode.com/@prafulchaudhari)

@prafulchaudhari · Surat, India

  
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