We also heavily rely on tsafe. It's a collection of utilities that help write cleaner TypeScript code. It is crutial to understand at least assert, id, Equals and symToStr to be able to contribute on the codebase.
We try, whenever we see an opportunity for it, to publish as standalone NPM module chunks of the code we write for Onyxia-web. It help keep the complexity in check. We use TS-CI as a starter for everything we publish on NPM.
Onyxia-UI offers a library of reusable components but you can also use MUI components in the project, their aspect will automatically be adapted to blend in with the theme.
If you want to test some changes made to onyxia-ui in onyxia-web before releasing a new version of onyxia-ui to NPM you can link locally onyxia-ui in onyxia-web.
Now you can make changes in ~/github/onyxia/ui/and see the live updates.
If you want to install/update some dependencies, you must remove the node_modules, do you updates, then link again.
A component should not size or position itself. It should always be the responsibility of the parent component to do it. In other words, you should never have height, width, top, left, right, bottom or margin in the root styles of your components.
Onyxia is mostly used on desktop computer screens. It's not worth the effort to create a fully flege responsive design for the UI.
screen-scaler enables us to design for a sigle canonical screen size. The library take charge of scaling/shrinking the image. depending on the real size of the screen.
It also asks to rotate the screen when the app is rendered in protrait mode.
Then, somehow, access OIDC_URL in the code like process.env["OIDC_URL"].
In theory it shouldn't be possible, onyxia-web is an SPA, it is just static JS/CSS/HTML. If we want to bundle values in the code, we should have to recompile. But this is where cra-envs comes into play.
It enables to run onyxia-web again a specific infrastructure while keeping the app docker image generic.
All the accepted environment variables are defined here: .env. They are all prefixed with REACT_APP_ to be compatible with create-react-app. Default values are defined in this file.
Only in development (yarn start) .env.local is also loaded and have priority over .env
Then, in the code the variable can be accessed like this.
Please try not to access the environment variable to liberally through out the code. In principle they should only be accessed here. We try to keep things pure as much as possible.
It's a collection general purpose react hooks. Let's document the few use cases you absolutely need to understand:
Avoiding useless re-render of Components
For the sake of performance we enforce that every component be wrapped into React.memo(). It makes that a component only re-render if one of their prop has changed.
However if you use inline functions or useCallback as callbacks props your components will re-render every time anyway:
Playground to explain the usefulness of useConstCallback
It is very handy to be able to get the height and the width of components dynamically. It prevents from having to hardcode dimension when we don’t need to. For that we use useDomRect``
It's a build tool that enables to implement the login and register pages that users see when they are redirected to Keycloak for authentication.
If the app is being run on Keycloak the kcContext isn't undefined and it means shat we should render the login/register pages.
If you want to test, uncomment this line and run yarn start. You can also test the login pages in a local keycloak container by running yarn keycloak. All the instructions will be printed on the console.
We use react-app-rewired instead of the default react-scripts to be able to use custom Webpack plugins without having to eject the App. The custom webpack plugins that we use are defined here /config-overrides.json. Currently we only one we use is circular-dependency-plugins.
EVT is an event management library (like RxJS is).
A lot of the things we do is powered under the hood by EVT. You don't need to know EVT to work on onyxia-web however, in order to demystify the parts of the codes that involve it, here are the key ideas to take away:
If we need to perform particular actions when a value gets changed, we useStatefullEvt.
We use Ctxto detaches event handlers when we no longer need them. (See line 108 on this playground)
In React, we use the useEvt hook to work with DOM events.
cd ~/github
git clone https//github.com/InseeFrLab/onyxia
cd onyxia/web
yarn install
cd ~/github/onyxia #This is just a suggestion, clone wherever you see fit.
git clone https://github.com/InseeFrLab/onyxia-ui ui
cd ui
yarn install
yarn build
yarn link-in-web
npx tsc -w
# Open a new terminal
cd ~/github/onyxia/web
yarn start
yarn storybook
docker run --env OIDC_URL="https://url-of-our-keycloak.fr/auth" InseeFrLab/onyxia-web
