85c13bb1f3
Summary: Pull Request resolved: https://github.com/facebook/flipper/pull/872 Move all the JS code related to desktop app to "desktop" subfolder. The structure of "desktop" folder: - `src` - JS code of Flipper desktop app executing in Electron Renderer (Chrome) process. This folder also contains all the Flipper plugins in subfolder "src/plugins". - `static` - JS code of Flipper desktop app bootstrapping executing in Electron Main (Node.js) process - `pkg` - Flipper packaging lib and CLI tool - `doctor` - Flipper diagnostics lib and CLI tool - `scripts` - Build scripts for Flipper desktop app - `headless` - Headless version of Flipper app - `headless-tests` - Integration tests running agains Flipper headless version Reviewed By: passy Differential Revision: D20249304 fbshipit-source-id: 9a51c63b51b92b758a02fc8ebf7d3d116770efe9
53 lines
2.7 KiB
Markdown
53 lines
2.7 KiB
Markdown
---
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id: react-native
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title: Building a React Native Plugin
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---
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<div class="warning">
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This tutorial requires React Native 0.62 or higher.
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</div>
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Once you have connected Flipper to a React Native application,
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writing your own Flipper plugin can be done without reaching into the native world.
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To expose Flipper to the JavaScript world, the React Native Native Module `react-native-flipper` needs to be installed in the hosting application by running `yarn add react-native-flipper`. If you are creating develop a plugin that is distributed as NPM package, make sure to add this to the installation instruction of your package as well!
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Registering a new plugin is done by importing `addPlugin` from `"react-native-flipper"` and providing it an object that at least implements the method `getId` (the plugin id that should be used in the desktop plugin as well to make the connection) and two event handlers for the `onConnect` and `onDisconnect` events.
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These `onConnect` and `onDisconnect` events are triggered every time the plugin becomes (in)active in the Flipper desktop application.
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If the plugin is a [background plugin](../extending/create-plugin.md#background-plugins), these events are triggered typically only once (they might be triggered never, if the Desktop user didn't enable the plugin, or multiple times if they enabled or disabled the plugin a few times).
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The `onConnect` callback receive a `connection` which can be used to communicate with the backend:
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```javascript
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import {addPlugin} from "react-native-flipper"
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addPlugin({
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getId() {
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return 'ReactNativeExamplePlugin';
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},
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onConnect(connection) {
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mammmals.forEach(({ title, pictureUrl }, index) => {
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connection.send('newRow', {
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id: index,
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title,
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url: pictureUrl
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})
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})
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},
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onDisconnect() {
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}
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})
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```
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You might want to store the connection somewhere to be able to send more events as long as `onDisconnect` event hasn't been fired.
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The `connection` object can also be used to listen to messages coming from the Desktop plugin. See [Client Plugin API](create-plugin) for details.
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An example plugin to play a little Tic-Tac-Toe between the Flipper Desktop and a React Native app can be found inside this repository as well (run `yarn && yarn android` in `react-native/ReactNativeFlipperExample` to start the test project):
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* The React Native JavaScript based plugin implementation: [FlipperTicTacToe.js](https://github.com/facebook/flipper/tree/master/react-native/ReactNativeFlipperExample/FlipperTicTacToe.js)
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* The Flipper Desktop plugin implementation: [rn-tic-tac-toe/index.tsx](https://github.com/facebook/flipper/blob/master/desktop/src/plugins/rn-tic-tac-toe/index.tsx)
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