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Create - (875 - JavaScript Signals Explained.md) #1950

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Create 875 - JavaScript Signals Explained.md
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randyrektor committed Feb 7, 2025
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---
number: 875
title: JavaScript Signals Explained
date: 1739185200000
url: https://traffic.libsyn.com/syntax/Syntax_-_875.mp3
youtube_url: https://www.youtube.com/watch?v=kZnQSrP-Yo4
---

JavaScript is missing a built-in way to make variables reactive—but Signals might change that. Scott and Wes break down what Signals are, how they compare to React state, and how different frameworks like Preact, Solid, Vue, and Qwik are already using them.

### Show Notes

* **[00:00](#t=00:00)** Welcome to Syntax!
* **[01:49](#t=01:49)** Brought to you by [Sentry.io](https://sentry.io/syntax).
* **[02:28](#t=02:28)** Why JavaScript needs reactive variables.
* **[03:16](#t=03:16)** What exactly are signals?
* [Signals Proposal](https://github.com/tc39/proposal-signals).
* **[04:02](#t=04:02)** Understanding computed state.
* **[04:59](#t=04:59)** How signals differ from React state.
* **[06:12](#t=06:12)** How different frameworks handle reactivity.
* **[07:09](#t=07:09)** DOM Parts.
* [Pull Request](https://github.com/WICG/webcomponents/pull/1023).
* **[07:26](#t=07:26)** HTML Template Instantiation.
* [Template Instantiation](https://github.com/WICG/webcomponents/blob/gh-pages/proposals/Template-Instantiation.md).
* **[09:10](#t=09:10)** Comparing signals across frameworks: Preact, Solid.js, Vue, and more.
* [PreactJS Signals](https://github.com/preactjs/signals).

### Hit us up on Socials!

Syntax: [X](https://twitter.com/syntaxfm) [Instagram](https://www.instagram.com/syntax_fm/) [Tiktok](https://www.tiktok.com/@syntaxfm) [LinkedIn](https://www.linkedin.com/company/96077407/admin/feed/posts/) [Threads](https://www.threads.net/@syntax_fm)

Wes: [X](https://twitter.com/wesbos) [Instagram](https://www.instagram.com/wesbos/) [Tiktok](https://www.tiktok.com/@wesbos) [LinkedIn](https://www.linkedin.com/in/wesbos/) [Threads](https://www.threads.net/@wesbos)

Scott: [X](https://twitter.com/stolinski) [Instagram](https://www.instagram.com/stolinski/) [Tiktok](https://www.tiktok.com/@stolinski) [LinkedIn](https://www.linkedin.com/in/stolinski/) [Threads](https://www.threads.net/@stolinski)

Randy: [X](https://twitter.com/randyrektor) [Instagram](https://www.instagram.com/randyrektor/) [YouTube](https://www.youtube.com/@randyrektor) [Threads](https://www.threads.net/@randyrektor)