vite-plugin-stylex

Unofficial Vite plugin for StyleX

Warning

This plugin is in early development and may not work as expected. Please report any issues you find.

Install the package

npm install --save-dev vite-plugin-stylex

# or

yarn add --dev vite-plugin-stylex

# or

pnpm add --save-dev vite-plugin-stylex

Setup

Plugin configuration

Add the plugin to your Vite config:

// ... other imports

import styleX from "vite-plugin-stylex";

export default defineConfig({
  plugins: [react(), styleX()],
});

Including StyleX styles in your project

Create a CSS file in your project and add the following:

/* stylex.css */
@stylex stylesheet;

/* You can use other styles here */

Finally, import the CSS file in your entrypoint:

// index.tsx or however your entrypoint is named
import "./stylex.css";

Extra steps for frameworks or SSR

Other setups may require extra steps to get StyleX working. For example, Remix requires you to import the CSS output in your root component.

• Remix
• SvelteKit
• Vue
• Qwik
• React Strict DOM (RSD)

Remix

1. Create an index.css file in your app directory.
2. Include the following:

@stylex stylesheet;

/* You can use other styles here */

3. Import the CSS file in your app/root.tsx component:

import "./index.css";

Note

You might also want to import the CSS file using url import syntax in your app/root.tsx file, and then return it from the links array

import stylexCSS from "./stylex.css?url";

export const links = () => [{ rel: "stylesheet", href: stylexCSS }];

...

SvelteKit

Create a +layout.svelte file in your src/routes directory:

<slot />

<style>
  @stylex stylesheet;
</style>

Vue

Vue doesn't require any extra setup steps, but here's an example of how you can use StyleX in your Vue components:

<script lang="ts" setup>
  import stylex from "@stylexjs/stylex";
</script>

<script lang="ts">
  // StyleX styles need to be defined at the top level of the module
  // so that StyleX can extract them.
  const styles = stylex.create({
    root: {
      backgroundColor: "white",
      borderRadius: 8,
      padding: 16,
      boxShadow: "0 0 16px rgba(0, 0, 0, 0.1)",
    },
  });
</script>

<template>
  <div v-bind="stylex.attrs(styles.root)">
    <slot />
  </div>
</template>

Qwik

Open the src/global.css file and add the following:

@stylex stylesheet;

Note

If you don't have a src/global.css file, create one and import it in your src/root.tsx file.

React Strict DOM (RSD)

Add an import source in your Vite config, like so:

import { defineConfig } from "vite";
import styleX from "vite-plugin-stylex";

export default defineConfig({
  plugins: [
    // ...other plugins
    styleX({
      importSources: [
        {
          from: "react-strict-dom",
          as: "css",
        },
      ],
    }),
  ],
});

Other Frameworks

It's possible that other frameworks don't work out of the box. If you find that this is the case, please open an issue.

Working with external StyleX files and libraries

If you want to use StyleX styles from another package, we need to tell Vite to not optimize the dependency so that the plugin can process them. To do this, the plugin provides a libraries option that you can use to provide a list of packages that provide StyleX styles.

import styleX from "vite-plugin-stylex";

export default defineConfig({
  plugins: [
    react(),
    styleX({
      libraries: ["cool-stylex-package"],
    }),
  ],
});

Note

This is done by default for @stylexjs/open-props, if you want more libraries to be excluded by default, please submit an issue.

Acknowledgments

• @stylexjs/rollup-plugin for the base implementation for this Vite plugin.