Parcel (@parceljs) | nitter

Parcel retweeted

Nov 4

Announcing Parcel v3, a ground up rewrite in Rust! 🚀

• Up to 100x faster than v2, 6x less memory
• Standalone Rust binary – no Node
• Native plugins in Rust, Go, Swift, or C
• Multi-threaded JS plugin runtime
• Smarter code splitting
• New library mode

Now in alpha. 👇

Bar chart with three groups. Storybook with Parcel 2 16s, Parcel 3 572ms, 29x faster. Docs website with v2 87s, v3 810ms, 108x faster. Library build with v2 131s, v3 2.7s, 49x faster.

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Parcel @parceljs

3 Dec 2025

If you’re using React Server Components with Parcel, please upgrade the react-server-dom-parcel package in your lock file ASAP!

React
@reactjs
3 Dec 2025
There is critical vulnerability in React Server Components disclosed as CVE-2025-55182 that impacts React 19 and frameworks that use it.

A fix has been published in React versions 19.0.1, 19.1.2, and 19.2.1. We recommend upgrading immediately.

react.dev/blog/2025/12/0…

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Parcel retweeted

9 Oct 2025

Replying to @devongovett

In case you missed it, here’s the recording of my talk! youtube.com/live/p9OcztRyD…

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Parcel retweeted

Daniel Williams @Danny_H_W

8 Oct 2025

Did you know this was possible with parcel? Pretty cool.

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Parcel retweeted

26 Jul 2025

Wrote an article about how React Server Components integrate with a bundler. It's a deep dive into how code splitting works, how RSCs eliminate network waterfalls, how environment directives like "use client" work, CSS loading, etc. Check it out! devongovett.me/blog/parcel-rs…

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Parcel retweeted

17 Jul 2025

Very happy that Parcel helped enable this! 🤩

React Router @ReactRouter
16 Jul 2025
React Router now has support for React Server Components

We're introducing a more powerful RSC-powered Data Mode that brings most of Framework Mode's features to our lower level library APIs

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Parcel retweeted

16 May 2025

RSC support in React Router powered by Parcel! 🤩 remix.run/blog/rsc-previ…

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Parcel retweeted

12 May 2025

Parcel v2.15 introduces a new HTML and SVG transformer and minifier written in Rust using browser-grade components from Firefox + Servo! 🚀

Replaces posthtml, htmlnano, SVGO, and SVGR.

10x faster. Reduces npm dependencies by 25% and install size by 45%.

parceljs.org/blog/v2-15-0/

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Parcel retweeted

29 Mar 2025

React 19.1 enables Server Components in Parcel with React Stable (not only canary)! Just released Parcel v2.14.3 with the corresponding update. 🥳

React
@reactjs
28 Mar 2025
React 19.1 has just been released! Check out the latest updates here: github.com/facebook/react…

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Parcel retweeted

24 Mar 2025

Added new Parcel React Server Components examples with Deno and Bun!

You can use any server/runtime you want. Parcel just builds your code.

github.com/parcel-bundler…

Screenshot of two chrome windows showing a Parcel + Deno + React Server App, and a Parcel + Bun + React Server App.

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Parcel retweeted

18 Mar 2025

Replying to @devongovett

Blog post: parceljs.org/blog/v2-14-0/

Try it out: npm create parcel react-server my-rsc-app

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Parcel retweeted

18 Mar 2025

Happy to announce Parcel v2.14, now with support for React Server Components! 🥳

RSCs can be integrated into client-rendered apps, server rendered, or statically rendered at build time.

Also: rust MDX compiler, create-parcel CLI, new error overlay, and native import maps.

Screenshot of code sample:

$ parcel server.tsx

// server.tsx
import express from 'express';
import {renderRequest} from '@parcel/rsc/node';
import {Page} from './Page';

const app = express();
app.get('/', async (req, res) => {
await renderRequest(req, res, <Page />);
});

app.listen(3000);

// Page.tsx
"use server-entry";
export function Page() {
return (
<html>
<body>
<h1>Hello world!</h1>
<Client />
</body>
</html>
);
}

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Parcel retweeted

18 Feb 2025

$ npx cra-to-parcel ✨

Screenshot of terminal log.

Ejecting jest config...
Updating dependencies...
$ npm rm react-scripts
$ npm install parcel
Updating package.json scripts...
Updating public/index.html...
Migrating SVG imports...
Detected SVG component imports. Added @parcel/transformer-svg-react to .parcelrc
Migrating CSS...
Detected @import-normalize. Added postcss-normalize to .postcssrc
Migrating JS...
Detected babel macros. Added babel.config.json
Adding Parcel files to .gitignore

✨ Successfully migrated from Create React App to Parcel!

Run npm start to start the dev server.
Parcel may install additional plugins as needed when building your app for the first time.

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Parcel retweeted

20 Feb 2025

New Create React App to Parcel migration guide: parceljs.org/migration/cra/

Covers our new automated migration script, and how to migrate manually step by step.

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Parcel retweeted

25 Nov 2024

Just published a Storybook Builder for Parcel! 🥳

It preserves state via React Fast Refresh in both your components and CSF story files using a custom transformer. Haven't seen this anywhere else.

Hot reloading for auto-generated controls via TS too.

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Parcel retweeted

12 Nov 2024

Just released Parcel v2.13.0! 🚀

Mostly a maintenance release (40+ fixes & updates!), but also a few nice features:

📚 New library mode that doesn't bundle, for improved tree shakability
🧑‍🍳 TypeScript proxy server config
🗃️ Globs in package.json source field
🏎️ Faster resolver

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Parcel retweeted

17 May 2024

Lightning CSS v1.25.0 is out! ⚡️

• CSS module options to disable scoping for grid, animation, and other features
• Optimizes the `all` shorthand
• Support animation-timeline in animation shorthand
• Bug fixes for transforms, color, and animations

github.com/parcel-bundler…

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Parcel retweeted

28 Feb 2024

Replying to @devongovett

Parcel also enables you to generate additional assets (eg css) from a macro. You can build your own statically extracted CSS-in-JS library in only a few lines of code. And since macros are just functions, you can create any API you want, eg accepting objects or theme values! 😲

Code example: index.ts imports a css macro, and calls it with a CSS string. The result is placed into the className prop of a div element. The css macro hashes the passed in code, generates a class name, and calls this.addAsset to generate a new asset from it, returning the class name. The bundled output shows a div with a static string in the className prop, and a corresponding CSS file with the generated CSS. See the documentation linked in the previous tweet for the full code.

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Parcel retweeted

28 Feb 2024

tailwind-merge can be used as a macro in Parcel to run it at build time! The output is a static string, so there is no runtime performance impact and the 20kb of extra bundle size is avoided. Pretty cool! 🙂

Input:
import {twMerge} from 'tailwind-merge' with {type: 'macro'}

const buttonBase = 'px-2 py-1 bg-red hover:bg-dark-red';
const ctaButton = twMerge(buttonBase, 'p-3 bg-[#B91C1C]');
console.log(ctaButton);

Bundled output:
console.log("hover:bg-dark-red p-3 bg-[#B91C1C]");

Devon Govett
@devongovett
28 Feb 2024
📢 Parcel v2.12.0 brings support for macros, a new web-based REPL, improved CSS bundling, and manual code splitting!

Macros are JS/TS functions that run at build time instead of being bundled. They can generate constants, code, and even assets (eg css)!

parceljs.org/blog/v2-12-0/

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Parcel retweeted

28 Feb 2024

📢 Parcel v2.12.0 brings support for macros, a new web-based REPL, improved CSS bundling, and manual code splitting!

Macros are JS/TS functions that run at build time instead of being bundled. They can generate constants, code, and even assets (eg css)!

parceljs.org/blog/v2-12-0/

Code example importing the regexgen library, calling the function with a list of strings, and storing the returned regex in a constant. Then console.logging it. The compiled bundle shows a console.log with a pre-compiled regex, and the import of regexgen completely removed. See the linked blog post for the full code.

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