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flipper/docs/tutorial/js-setup.mdx
Anton Nikolaev 830e380127 Update public plugins location in docs
Summary: Updated docs after moving public plugins to "desktop/plugins/public". Additionally edited the pages related to plugins which were a bit outdated.

Reviewed By: jknoxville

Differential Revision: D27646670

fbshipit-source-id: 26499aff492db817156fecf20fa8358efc70ae8f
2021-04-09 05:22:01 -07:00

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---
id: js-setup
title: Building a Desktop Plugin
sidebar_label: Building a Desktop Plugin
---
import useBaseUrl from '@docusaurus/useBaseUrl';
Now that we have the native side covered, let's display the data we're sending
on the desktop side. You can check out the full workflow of building Flipper desktop
plugins here: https://fbflipper.com/docs/extending/js-setup.
<img alt="Custom cards UI for our sea mammals plugin" src={useBaseUrl("img/js-custom.png")} />
## Dynamic Plugin loading
<FbInternalOnly>
[FB-Only] After scaffolding and starting Flipper from source, no further steps are needed to setup the desktop plugin.
</FbInternalOnly>
<OssOnly>
By default, Flipper will start with the plugins it was bundled with. You can
configure it to also look for plugins in custom directories. To do that,
modify the `~/.flipper/config.json` file that is created the first time
you start Flipper and add a newly created directory the `pluginPaths` attribute.
Your file will then look something like this:
```json
{
"pluginPaths": [
"~/Flipper/custom-plugins/"
],
...
}
```
## Creating the Plugin Package
With the loading part out of the way, we can create the new plugin. For that, first create a new folder inside the custom plugins directory. Then use `flipper-pkg init` to initialise a new Flipper desktop plugin package.
`flipper-pkg` is a NPM module, so we can run it directly using `npx` if Node and NPM are installed.
```bash
$ cd ~/Flipper/custom-plugins/
$ npx flipper-pkg init
```
The tool will ask you to provide "id" and "title" for your plugin. Use "sea-mammals" as "id" and "Sea Mammals" as "title". After that the tool will create two files in the directory: `package.json` and `src/index.tsx`.
See [package.json](https://github.com/facebook/flipper/blob/master/desktop/plugins/public/seamammals/package.json) for an example.
To ensure there are no errors in the defined plugin, install packages (using `yarn install` or `npm install`) and execute script `lint` (`yarn lint` or `npm run lint`) which shows all the mismatches that should be fixed to make the plugin definition valid.
Now that our package has been set up, we are ready to build a UI for our plugin. Either by using a standardized table-based plugin, or by creating a custom UI.
</OssOnly>