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Storybook builder for Vite

Build your stories with vite for fast startup times and near-instant HMR.

Note: This Repository is for Storybook 6.4 and 6.5. In Storybook 7, the Vite builder was brought into the main Storybook monorepo ( See for details.

Table of Contents



npm install @storybook/builder-vite --save-dev


yarn add --dev @storybook/builder-vite


pnpm add --save-dev @storybook/builder-vite

Note: when using pnpm, you may need to enable shamefully-hoist, until #55 can be fixed.


In your main.js configuration file, set core: { builder: "@storybook/builder-vite" }.

For autoreload of react stories to work, they need to have a .stories.tsx or .stories.jsx file suffix. See also #53

The builder supports both development mode in Storybook, and building a static production version.

Getting started with Vite and Storybook (on a new project)


npm create vite@latest # follow the prompts
npx sb init --builder @storybook/builder-vite && npm run storybook

Migration from webpack / CRA

  1. Install vite and @storybook/builder-vite
  2. Remove any explicit project dependencies on webpack, react-scripts, and any other webpack plugins or loaders.
  3. If you were previously using @storybook/manager-webpack5, you'll need to remove it, since currently the vite builder only works with manager-webpack4, which is the default and does not need to be installed manually. Also remove @storybook/builder-webpack5 or @storybook/builder-webpack4 if they are installed.
  4. Set core: { builder: "@storybook/builder-vite" } in your .storybook/main.js file.
  5. Remove storybook webpack cache (rm -rf node_modules/.cache)
  6. Update your /public/index.html file for vite (be sure there are no %PUBLIC_URL% inside it, which is a CRA variable)
  7. Be sure that any files containing JSX syntax use a .jsx or .tsx file extension, which vite requires. This includes .storybook/preview.jsx if it contains JSX syntax.
  8. If you are using @storybook/addon-interactions, for now you'll need to add a workaround for jest-mock relying on the node global variable by creating a .storybook/preview-head.html file containing the following:
<script> = window;
  1. Start up your storybook using the same yarn storybook or npm run storybook commands you are used to.

For other details about the differences between vite and webpack projects, be sure to read through the vite documentation.

Customize Vite config

The builder will not read your vite.config.js file by default.

In .storybook/main.js (or whatever your Storybook config file is named) you can override the Vite config:

// use `mergeConfig` to recursively merge Vite options
const { mergeConfig } = require('vite');

module.exports = {
  async viteFinal(config, { configType }) {
    // return the customized config
    return mergeConfig(config, {
      // customize the Vite config here
      resolve: {
        alias: { foo: 'bar' },
  // ... other options here

The viteFinal function will give you config which is the builder's own Vite config. You can tweak this as you want, for example to set up aliases, add new plugins etc.

The configType variable will be either "DEVELOPMENT" or "PRODUCTION".

The function should return the updated Vite configuration.

Svelte Customization

When using this builder with Svelte, your svelte.config.js file will be used automatically.

If you need to make overrides for Storybook, your .storybook/main.js (or equivalent) can contain a svelteOptions object to pass custom options to vite-plugin-svelte:

const preprocess = require('svelte-preprocess');

module.exports = {
  svelteOptions: {
    preprocess: preprocess({
      typescript: true,
      postcss: true,
      sourceMap: true,


Configure your .storybook/main.ts to use TypeScript:

import type { StorybookViteConfig } from '@storybook/builder-vite';

const config: StorybookViteConfig = {
  // other storybook options...,
  async viteFinal(config, options) {
    // modify and return config

export default config;

Or alternatively, you can use named exports:

import type { ViteFinal } from '@storybook/builder-vite';

export const viteFinal: ViteFinal = async (config, options) => {
  // modify and return config

See Customize Vite config for details about using viteFinal.

React Docgen

Docgen is used in Storybook to populate the props table in docs view, the controls panel, and for several other addons. Docgen is supported in vue and react, and there are two docgen options when using react, react-docgen and react-docgen-typescript. You can learn more about the pros/cons of each in this gist. By default, if we find a typescript dependency in your package.json file, we will assume you're using typescript and will choose react-docgen-typescript. You can change this by setting the typescript.reactDocgen option in your .storybook/main.js file:

module.exports = {
  typescript: {
    reactDocgen: 'react-docgen',

If you're using TypeScript, we encourage you to experiment and see which option works better for your project.

Note about working directory

The builder will by default enable Vite's server.fs.strict option, for increased security. The default project root is set to the parent directory of the storybook configuration directory. This can be overridden in viteFinal.

Known issues

  • HMR: saving a story file does not hot-module-reload, a full reload happens instead. HMR works correctly when saving component files.

Migration from storybook-builder-vite

This project has moved from storybook-builder-vite to @storybook/builder-vite as part of a larger effort to improve Vite support in Storybook. To automatically migrate your existing project, you can run

npx sb@next automigrate

To manually migrate:

  1. Remove storybook-builder-vite from your package.json dependencies
  2. Install @storybook/builder-vite
  3. Update your core.builder setting in .storybook/main.js to @storybook/builder-vite.


The Vite builder cannot build itself. Are you willing to contribute? We are especially looking for vue and svelte experts, as the current maintainers are react users.


Have a look at the GitHub issues for known bugs. If you find any new bugs, feel free to create an issue or send a pull request!

Please read the How to contribute guide.

About this codebase

The code is a monorepo with the core @storybook/builder-vite package, and examples (like examples/react) to test the builder implementation.

Similar to the main storybook monorepo, you need yarn to develop this builder, because the project is organized as yarn workspaces. This lets you write new code in the core builder package, and instantly use them from the example packages.