---
title: "Discussion on \"Creating a JavaScript promise from scratch, Part 3: then(), catch(), and finally()\" | Hashnode"
description: "Discussion on \"Creating a JavaScript promise from scratch, Part 3: then(), catch(), and finally()\". This post originally appeared on the Human Who Codes blog on October 6, 2020.\nIn my first post of this series, I explained how the Promise constructor works by recreating it as the Pledge constructor. In the second post in this series, I explained ho..."
url: "https://hashnode.com/posts/creating-a-javascript-promise-from-scratch-part-3-then-catch-and-finally/5f85dc964f98e64389435ba5"
---

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# [Creating a JavaScript promise from scratch, Part 3: then(), catch(), and finally()](https://hashnode.humanwhocodes.com/creating-a-javascript-promise-from-scratch-part-3-then-catch-and-finally?utm_source=hashnode&utm_medium=feed)

This post originally appeared on the Human Who Codes blog on October 6, 2020. In my first post of this series, I explained how the Promise constructor works by recreating it as the Pledge constructor. In the second post in this series, I explained ho...

Oct 6, 2020 · 30 min read · hashnode.humanwhocodes.com  
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-   [#ecmascript6](https://hashnode.com/tag/ecmascript6)
-   [#promises](https://hashnode.com/tag/promises)

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