funkwhale/docs/developer/contribute/frontend.md

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# Contribute to the frontend
The Funkwhale frontend is a {abbr}`SPA (Single Page Application)` written in [Typescript](https://typescriptlang.org) and [Vue.js](https://vuejs.org).
## Troubleshooting
### Network errors (405 and 404) in the console
If you are using Google Chrome, you may have to disable the network cache:
- Go to the Dev Tools
- Select the Network tab
- In the toolbar under the Network tab, activate the checkmark "Disable Cache"
### Edits don't appear when I check them in the browser
Reload the page with `Ctrl+Shift+R` (Mac: `Cmd+Shift+R`)
Make sure you have no add-ons in your browser that mess with the DOM. The best way to check is to open a private window/tab with `Ctrl/Cmd+Shift+P` (Firefox)
## Styles
<--! TODO: Mermaid diagrams -->
### UI styles
```mermaid
graph TD
/node_modules/bootstrap-icons/font/bootstrap-icons.css --> src/styles/font.scss
src/styles/base/generic.scss --> src/styles/base/index.scss
src/styles/base/index.scss --> src/styles/funkwhale.scss
src/styles/font.scss --> src/styles/funkwhale.scss
src/styles/colors.scss --> src/styles/funkwhale.scss
src/styles/funkwhale.scss --> src/main.ts
```
### App styles
```mermaid
graph TD
_css_vars --> /themes/_...
vendor/_media.scss --> _main.scss
/globals/_... --> _main.scss
/components/_... --> _main.scss
/pages/_... --> _main.scss
/themes/_... --> _main.scss
_vars.scss --> /themes/_...
```
## Components
Start the **UI Live Docs** (vitepress) and follow the link:
```sh
yarn dev:docs
```
- Example: [Button component in the live docs](http://localhost:5173/components/ui/button)
- Find more details about the UI library and [how to contributein the live docs](http://localhost:5173/contributing)
<!-- prettier-ignore-start -->
(testing)=
## Testing
<!-- prettier-ignore-end -->
### Unit tests
The Funkwhale frontend contains some tests to catch errors before changes go live. The coverage is still fairly low, so we welcome any contributions.
To run the test suite, run the following command:
```sh
docker compose run --rm front yarn test:unit
```
To run tests as you make changes, launch the test suite with the `-w` flag:
```sh
docker compose run --rm front yarn test:unit -w
```
### End-to-end testing and User testing
In addition, there are End-to-end tests (cyprus), and we are planning to do User tests in 2025.