storybook-addon-twig

Twig source and code highlighting for Storybook.

storybook-addon-twig adds a Twig panel for story-level source and patches Storybook Docs code blocks in the preview runtime so Twig MDX fences and explicit Twig Source blocks render through the same Twig highlighter.

Install

bun add -d storybook-addon-twig

[!NOTE] This package is designed for Storybook 10.

Register the addon:

// .storybook/main.ts
import type { StorybookConfig } from '@storybook/react-vite';

const config: StorybookConfig = {
  addons: [
    {
      name: 'storybook-addon-twig',
      options: {
        copy: true,
        docsCodeBlocks: true,
        showLineNumbers: true,
      },
    },
  ],
};

export default config;

Add source to a story:

export const Default = {
  parameters: {
    twig: {
      fileName: 'button.html.twig',
      source: "{% include 'button.html.twig' with { label: 'Save' } %}",
    },
  },
};

[!TIP] source is displayed exactly as provided. Pass formatted Twig when you want the panel and Docs output to preserve project formatting.

Generate source snippets from Twig include metadata:

import { buildTwigSourceParameters } from 'storybook-addon-twig/source';

export const Default = {
  parameters: {
    twig: buildTwigSourceParameters({
      template: 'Components/Atoms/Button/button.html.twig',
      args: {
        text: 'Save',
        type: 'primary',
      },
    }),
  },
};

This only builds the parameters.twig source object. Rendering the actual story still belongs to your Storybook framework or renderer integration.

Options

Option	Default	Purpose
docsCodeBlocks	true	Enable preview-side Twig docs patching for Twig docs/source blocks
panel	true	Register the dedicated Twig addon panel
copy	true	Enable copy actions for addon-owned Twig code surfaces
showLineNumbers	true	Show line numbers in addon-owned Twig code surfaces
wrapLines	true	Wrap long lines in addon-owned Twig code surfaces

With docsCodeBlocks: true, the addon owns Twig rendering for these Docs paths:

• fenced MDX blocks such as ```twig and ```html.twig
• explicit <Source language="twig" /> blocks
• the optional Twig manager panel

Behavior Notes

• The Twig addon panel and Docs code blocks are independent. You can disable the panel with panel: false and keep docs highlighting with docsCodeBlocks: true.
• Storybook's Source block inside Canvas remains Storybook-owned unless you explicitly set a Twig language on the docs/source block.
• The sync icon in the panel toolbar triggers a Storybook FORCE_RE_RENDER refresh for the current story.

Docs Behavior

Docs highlighting is automatic when the addon is registered and docsCodeBlocks is enabled.

The preview runtime watches Storybook's Docs code surfaces and replaces Twig-tagged blocks with addon-owned highlighted output. This is the same category of runtime approach used by addons such as @lukethacoder/storybook-addon-shiki, and it avoids relying on Storybook-internal docs component aliasing.

Migration Notes

• patchDocsCodeBlocks is removed. Use docsCodeBlocks.
• theme is not part of this addon's API.

Troubleshooting

If Storybook fails after upgrading this addon, clear optimize-deps/cache artifacts and restart:

rm -rf node_modules/.cache/storybook node_modules/.vite

Development

This repo is Bun-first:

bun install
bun run build
bun run check:package
bun run coverage
bun run lint
bun run format:check
cd sandbox && bun run build-storybook
bun run storybook

The sandbox Storybook lives in sandbox/ and resolves the parent addon package directly from its Storybook config.

Documentation

Topic	Page
Configuration	docs/configuration.md
Architecture	docs/architecture.md
Sandbox	docs/sandbox.md
Testing	docs/testing.md
Release process	docs/release.md
Contributing	CONTRIBUTING.md

License

MIT