Awesome
create-react-native-module
Tool to create a React Native library module or native view component, with a single command.
See below for command-line usage, example with no view, and example with an extremely simple native view.
This tool based on react-native-create-library
, with working example callbacks, optional native view, and more updates added by @brodybits (Christoper J. Brody aka Chris Brody) and other contributors.
Support options
- community support via issues
- commercial support is available, please contact if interested: sales@brodysoft.com
General status
- Minimum React Native version:
0.60
(outdated),0.64
or upcoming0.65
(recommended) - see issue#423
- It is recommended to disable or remove Flipper on iOS in case of debug build issues - see issue
#422
- generated example app with symlink by default, has known issue with adding dependencies to the library root - see issue
#308
- Platform fork support
- tvOS platform fork
- requires use of
--tvos-enabled
option as documented below - requires the
react-native-tvos
fork, with minimum version of0.60.x
(newer version is highly recommended) ref: - It is recommended to disable or remove Flipper in case of debug build issues - see issue
#422
- requires use of
- tvOS platform fork
- Out-of-tree target platforms
- Windows target platform - not supported directly, please use
react-native-windows-init
according to this procedure: https://aka.ms/RNW-NativeModuleSetup - for future consideration: macOS (see issue
#94
)
- Windows target platform - not supported directly, please use
Why might you need this?
If you are looking to create a native module for React Native, you need some native code for each platform you want to support and then some JavaScript code to bind it all together. Setting this up by yourself can be time-consuming.
This is where this tool comes in. It creates a boilerplate with all current best practices in mind.
Why not use react-native new-library
? Unfortunately that command doesn't create an up-to-date library, requires an already initialized React Native project and only sets up the iOS side of things.
Alternatives
otobank/create-react-native-module
- fork with TypeScript, Swift, and Kotlin support, with some other updates and some less useful features removed; see also issue#425
brodybits/react-native-module-init
- new interactive CLI that uses the templates from this utiityreact-native-community/bob
- opinionated, interactive library CLI that is designed to support both native libraries and libraries with web support
Outdated alternatives: see acknowledgements below
Installation
Package required to be installed globally if the recommended example app is generated:
$ npm install -g yarn
To install this package:
$ npm install -g create-react-native-module
Command-line usage
Navigate into an empty directory to execute the command.
$ create-react-native-module MyFancyLibrary
This will create the folder MyFancyLibrary
in which the library will be created in.
Now install dependencies by running this command in the newly created library.
$ npm install
Usage: create-react-native-module [options] <name>
Options:
-V, --version output the version number
--package-name <packageName> The full package name to be used in package.json. Default: react-native-(name in param-case)
--is-view Generate the package as a very simple native view component. Status: EXPERIMENTAL, with limited testing.
--object-class-name The name of the object class to be exported by both JavaScript and native code. Default: (name in PascalCase)
--native-package-id <nativePackageId> [Android] The native Java package identifier used for Android (Default: `com.reactlibrary`)
--platforms <platforms> Platforms the library module will be created for - comma separated (Default: `ios,android`)
--tvos-enabled Generate the module with tvOS build enabled (requires react-native-tvos fork, with minimum version of 0.60, and iOS platform to be enabled)
--github-account <githubAccount> The github account where the library module is hosted (Default: `github_account`)
--author-name <authorName> The author's name (Default: `Your Name`)
--author-email <authorEmail> The author's email (Default: `yourname@email.com`)
--license <license> The license type (Default: `MIT`)
--use-apple-networking [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: Use `AFNetworking` dependency as a sample in the podspec & use it from the iOS code - see issue #426
--generate-example Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally
--example-file-linkage DEPRECATED: do `yarn add file:../` instead of `yarn add link:../` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js
--example-name <exampleName> Name for the example project (default: `example`)
--example-react-native-template <...> The React Native template used for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (default: `react-native@latest`)
--write-example-podfile [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile
-h, --help output usage information
Programmatic usage
const createLibraryModule = require('create-react-native-module');
createLibraryModule({
name: 'MyFancyLibraryModule'
}).then(() => {
console.log('Oh yay! My library module has been created!');
})
Options
{
name: String, /* The name of the library (mandatory) */
packageName: String, /* The full package name to be used in package.json. Default: react-native-(name in param-case) */
isView: Boolean, /* Generate the package as a very simple native view component. Status: EXPERIMENTAL, with limited testing. (Default: false) */
objectClassName: String, /* The name of the object class to be exported by both JavaScript and native code. Default: (name in PascalCase) */
platforms: Array | String, /* Platforms the library will be created for. (Default: ['android', 'ios']) */
nativePackageId: String, /* [Android] The native Java package identifier used for Android (Default: `com.reactlibrary`) */
tvosEnabled: Boolean, /* Generate the module with tvOS build enabled (requires react-native-tvos fork, with minimum version of 0.60, and iOS platform to be enabled) */
githubAccount: String, /* The github account where the library is hosted (Default: `github_account`) */
authorName: String, /* The author's name (Default: `Your Name`) */
authorEmail: String, /* The author's email (Default: `yourname@email.com`) */
license: String, /* The license type of this library (Default: `MIT`) */
useAppleNetworking: Boolean, /* [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: Use `AFNetworking` dependency as a sample in the podspec & use it from the iOS code - see issue #426 (Default: false) */
generateExample: Boolean, /* Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally (Default: false) */
exampleFileLinkage: Boolean, /* DEPRECATED: do `yarn add file:../` instead of `yarn add link:../` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js (Default: false) */
exampleName: String, /* Name for the example project (Default: `example`) */
exampleReactNativeTemplate: String, /* The React Native template used for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (Default: `react-native@latest`) */
writeExamplePodfile: Boolean, /* [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile (Default: false) */
}
Examples
Example module with no view
Create the module with no view:
create-react-native-module --package-identifier io.mylibrary --generate-example AliceHelper
The module would be generated in the react-native-alice-helper
subdirectory, and the example test app would be in react-native-alice-helper/example
.
Then go into the example app subdirectory:
cd react-native-alice-helper/example
Running the example app
Recommended: Follow the instructions shown in the end of the console log output, which are more likely to be up-to-date.
Extra notes:
Within the example test app subdirectory:
It is recommended to start the Metro Bundler manually (within react-native-alice-helper/example
), which would run in the foreground:
yarn start
Otherwise, React Native will open its own window to run the Metro Bundler.
To run on Android, do the following command (within react-native-alice-helper/example
):
yarn android
for React Native 0.60
: npx react-native run-android
This assumes that the ANDROID_HOME
environmental variable is set properly. Here is a sample command that does not make such an assumption on a mac:
ANDROID_HOME=~/Library/Android/sdk npx react-native run-android
For iOS:
Extra installation step needed in case of clean checkout only:
cd ios && pod install && cd ..
Then to run on iOS:
yarn ios
for React Native 0.60
: npx react-native run-ios
or do the following command to open the iOS project in Xcode:
open ios/example.xcodeproj
Expected result
The example app shows the following indications:
- STATUS: native callback received
- NATIVE CALLBACK MESSAGE with the number argument and string argument values that are received by the native module
Example view module
EXPERIMENTAL feature with limited testing
Create the module with an extremely simple view:
create-react-native-module --package-identifier io.mylibrary --is-view --generate-example CarolWidget
The module would be generated in the react-native-carol-widget
subdirectory, and the example test app would be in react-native-carol-widget/example
.
Then go into the example app subdirectory:
cd react-native-carol-widget/example
Running the view example app
Recommended: Follow the instructions shown in the end of the console log output, which are more likely to be up-to-date.
Some extra notes:
Within the example test app subdirectory:
It is recommended to start the Metro Bundler manually as described above (within react-native-carol-widget/example
):
yarn start
To run on Android: do yarn android
or npx react-native run-android
as described for the other example above.
To run on iOS (as described above):
- in case of clean checkout only: do
pod install
inios
subdirectory - do
yarn ios
,npx react-native run-ios
, oropen ios/example.xcodeproj
Expected result:
- on Android: a check box that is checked (and cannot be changed)
- on iOS: a label with 5 red asterisks
Acknowledgements
react-native-create-library
- original basis of this projectreact-native-share
- was acknowledged as "a great source of inspiration" forreact-native-create-library