Royal Opera House Chord - Front End Design System

Welcome to The Royal Opera House Front End Design System, @royaloperahouse/chord

This package is a library of UI components intended to be used in the ROH website.

It uses React, TypeScript, TSDX and Storybook.

The NPM packages are published at https://www.npmjs.com/package/@royaloperahouse/chord

The Storybook for the latest version of the library is hosted at chord.roh.org.uk

Prerequisites

---

* Use a node version of 16 at the highest to run the storybook locally

* Make sure the required package dependencies are installed using yarn install

* If this is the first time you are working on Chord, make sure to run yarn build to build all the modules.

* To deploy the storybook publicly you will need credentials for the parent 'Royal Opera House' AWS account in your ~/.aws/credentials file.
* The deploy script expects these to be called [parent].

* You can find these values at:

AWS 'Your Applications' page -> 'Royal Opera House' -> 'Developer Access' -> 'Command line or programmatic access'

* To deploy a preview for demo / QA you will need the CHROMATIC_PROJECT_TOKEN -- find this in 1Password

* To publish the NPM package you will need the ROH NPM_TOKEN -- find this in 1Password

Versioning

---

We use Semantic Versioning for Chord.

Given a version number MAJOR.MINOR.PATCH, increment the:

* MAJOR version when you make incompatible library changes
* MINOR version when you add functionality in a backwards compatible manner
* PATCH version when you make backwards compatible bug fixes

When you create a new release always update the CHANGELOG and package.json

Increment your version from the latest stable version on main

Deploying the Storybook

---

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You can quickly build and serve the contents of /storybook-static from your local machine, for development and manual testing. To do this run:

``bash
yarn storybook
`

By default the storybook will be accessible at
http://localhost:6006/

The server will hot-reload on most changes.

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You can deploy a release candidate, or work-in-progress to Chromatic for showcase or QA.

NOTE: you will need the CHROMATIC_PROJECT_TOKEN as described in Prerequisites above.

Either set the token as a shell variable or use a .env file in the chord root directory containing the token, as so:

`
CHROMATIC_PROJECT_TOKEN=tokengoeshere
`

Run:

`
yarn deploy-storybook-dev
`

to build and deploy the storybook from your repo to Chromatic.

You will find the address of your deployed storybook in the console output, looking something like this:

→ View your Storybook at https://randomHexString-randomAlphabeticalString.chromatic.com

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You can deploy the contents of ./storybook-static to S3 as a static site, which is permanently accessible at chord.roh.org.uk

NOTE: To do this you will need the correct AWS credentials set up, as described in Prerequisites above.

First build the storybook using:

`
yarn build-storybook
`

then run:

`bash
yarn deploy-storybook
`

> IMPORTANT: This URL is intended to showcase the latest stable version of Chord, it should be kept up to date with the main branch and should only be used for release versions. If you want to deploy a development version follow the steps above under To deploy a preview version remotely.




Releasing a New Package Version

---

This is the procedure for releasing a new Chord NPM package.

There are two types of package:

A snapshot can be published to use a development version of the Chord library in our frontend staging environments, to perform integrated, manual testing.

A stable package is published for use in production.

NOTE: You will need the NPM_TOKEN, as described in 'Prerequisites' above.

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> IMPORTANT: Make sure you always publish your snapshots from development after merging in your feature branch.

For snapshots, RELEASE_VERSION should be the same as the latest stable version of the Chord Library, as found in main, followed by an unused lowercase letter.

For example, if the latest stable release was 1.42.0, and the last snapshot published to NPM was 1.42.0-w, you would use RELEASE_VERSION 1.42.0-x

To publish a snapshot use:

`bash
NPM_ROH_TOKEN={NPM_TOKEN} RELEASE_VERSION={RELEASE_VERSION} yarn publish-snapshot
`

The version published to NPM will be named, e.g. 1.42.0-x-development, use this to install the snapshot package in the frontend repos.

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> IMPORTANT: Make sure you always publish your stable packages from main after merging in your feature branch.

For stable releases, increment your version from the latest stable version found on main, following the rules described in Versioning above, and use this as RELEASE_VERSION. (Make sure it matches the version in your package.json and CHANGELOG.md!)

To publish a stable package use:

`bash
NPM_ROH_TOKEN={NPM_TOKEN} RELEASE_VERSION={RELEASE_VERSION} yarn publish-release
`




Using the Package

---

The package is deployed to NPM, and can be installed using yarn or npm:

`bash
npm i --save @royaloperahouse/chord
`
`bash
yarn add @royaloperahouse/chord
`




Testing

---

To Lint the package use:

`bash
yarn lint


Use the --fix option to perform automatic fixes


`

To run the unit tests (using Jest) use:

`bash
yarn test

Use the -u option to update snapshots if needed




Run yarn test:watch to re-run tests on changes


`

To run and and store the unit tests for display in storybook use:

`bash
yarn test-storybook


Use the -u option to update snapshots if needed


`

Development Process

---

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* The Chord project source can be found at https://bitbucket.org/rohorguk/harmonic-library in the chord directory
* The Chord development branch is currently development
* The Chord main branch is currently main
* All work should be done on a correctly named feature branch of the format: issueType/ticketNumber-short-description-of-feature, e.g. feature/RD-1234-update-chord-documentation
* Always create your feature branch FROM, and submit pull requests TO, the main branch
* For QA / UAT of a Chord component in isolation: following review you should deploy a preview version to Chromatic straight from your feature branch _without_ merging to development
* For releasing an NPM snapshot: merge your feature branch into the development branch and publish the NPM snapshot from there

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#### Before review:

* Git pull the latest version of main
* Checkout a new, correctly-named feature branch from main
* Do your work on this feature branch
* Run: yarn lint
* Run: yarn test
* Commit your changes
* Create a pull request from your feature branch to main
* Add the appropriate reviewers

#### Before QA / UAT:

After your PR is approved, you have two options:

i. For QA of a component in isolation:

Follow the steps above in Deploying the Storybook -> 2. Deploying a preview version remotely*
* Share the generated Chromatic URL with the appropriate people for QA / UAT

ii. For integrated testing of a component in the frontend staging environments:

* Check out the development branch
* Merge your work in to development
Follow the steps above under Publishing a New Package Version -> 1. To release a snapshot version*
* Git push the updated development branch to remote
* Finally, in the frontend repo:

1. Update the package.json to reference the new snapshot version
2. Run: yarn install
3. Deploy the frontend to a staging environment

#### When ready for production:

* Return to your chord feature branch
Update the chord version in package.json, incrementing from the last stable release, found in main, and following the rules described in the Versioning* section
* Update CHANGELOG.md, adding the new version number and a short description of your changes
* Run: yarn lint
* Run: yarn test
* Run: yarn test-storybook -u
* Run: yarn build-storybook
* Git commit, push, and update your PR for final approval
* Merge your approved PR to main
Follow the steps in Publishing a New Package Version -> 2. To release a stable version* to publish the NPM package
Finally, follow the steps in Deploying The Storybook -> 3. To deploy a release version*, to update the public Chord Storybook page

Once you have successfully published a new release version, you can open a ticket to update to this version in any of the frontend repos.




Notes

---

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This folder contains all the HTML / JS required to deploy the Storybook as a static site. It's autogenerated whenever the Storybook is built and therefore will show up a lot of merge conflicts when you merge other branches into your feature branch. It is best to leave generating the storybook until the later part of your workflow, but in case you run into conflicts earlier, it's ok to just delete the folder and regenerate using:

`bash
yarn build-storybook
`

For the same reason changes to this folder will cause a lot of big diffs, when looking at a PR, but can mostly be skimmed over unless something looks unusual.

---


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There is an example implementation in the example folder. Alternatively there are also integration examples in storybook. Make sure to keep these updated so as to showcase the current components available.

---


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Calculate the real cost of your library using size-limit with yarn size and visualize it with yarn analyze`.