@ilo-org/twig

ILO Design System - Twig Package

This package provides the implementation of the Design System using Twig. It also includes a Storybook project for documentation and development of the components in the system. Storybook and twig integration is done by the internal Maestro. It has dependencies on the following other @ilo-org packages:

• @ilo-org/fonts
• @ilo-org/styles
• @ilo-org/icons

Drupal Integration

• For Drupal integration, please refer to the Main Documentation
• Drupal Base Theme

Available Commands

Prerequisites

• Node.js version 24 or higher
  • You can use nvm to manage your Node.js versions
• pnpm installed globally or via corepack >= 9.14.0

Getting Started

Before running any of the commands below, make sure to:

• Run pnpm install from the monorepo root to install all dependencies
• Run pnpm build:libs from the monorepo root to build all necessary packages

Command	Description
pnpm build:lib	Builds the library
pnpm build:docs	Generates static Storybook documentation
pnpm storybook	Starts Storybook development server on port 6006
pnpm start:theme	Starts Docker containers in detached mode(Used in tests)
pnpm cr:theme	Rebuilds Drupal cache inside Docker container(Used in tests)
pnpm cy:open	Opens Cypress test runner(Used in tests)
pnpm test	Runs Cypress tests in headless mode(Used in tests)
pnpm lint	Runs ESLint to check code quality
pnpm lint:fix	Runs ESLint with automatic fixes

Development

Each component is located in the src/components folder. Each component has its own folder named after the component. Inside each component folder, you will find:

• [component].twig: The Twig template file for the component. (Required)
• [component].component.yml: UI Patterns definition for the component. This file will be used for the story generation too. (Required)
• [component].js: The JavaScript file for the component. (Optional)
• [component].behavior.js: The Drupal behavior runner for attaching the JS bundle to the component. (Optional)
• Sub components can be also created inside the component folder (Check the accordion component for reference)

The storybook is a source of truth for the components. Each component will have its own stories file located in the stories/[component].stories.js file. The stories are generated from the UI Patterns definition file using the Maestro.

Here is an example of a story file for the button component:

import Button from "../src/components/button/button.twig"; // Twig template
import ButtonPatterns from "../src/components/button/button.component.yml"; // UI Patterns definition
import { Maestro } from "@ilo-org/maestro";

const story = Maestro.create(Button, ButtonPatterns); // Generates a meta and stories from the UI Patterns definition

const Meta = {
  title: "Components/User Interface/Button",
  tags: ["autodocs"],
  ...story.meta,
};

const [Default] = story.stories; // Extracts the generated story

export default Meta;

export { Default };

For more details about the Maestro check the Maestro documentation.

Testing

We are using Cypress for component testing. To achieve this, we have a Drupal instance running inside a Docker container. The Drupal instance has the ILO Base Theme installed and configured. The components are rendered using the Base Theme and then tested using Cypress.

You can start the Docker containers using the following command:

pnpm run start:theme

After that you can check the localhost:8082 to see the Drupal instance running.

To open the Cypress test runner, you can use the following command:

pnpm run cy:open

You can find the tests in the cypress/e2e folder. Each component will have its own test file named after the component.

Contributing

For contribution guidelines, please refer to the Main Documentation.