React Native Change Port

usage on package.json

{
  // ...,
  "scripts": {
    // ...,
    "postinstall": "npx -y rn-change-port 6789"
  }
}

manual

npx rn-change-port [PORT] [ReactNativePath]

• PORT: port that metro will listen on
• ReactNativePath: path to react native root folder, use it when you place react native project on another location (ex. use with lerna)

notice

This module patch 2 files in pod React-Core, so if you call pod install, you should manually execute command npx -y rn-change-port xxx once before build

• If you get error

Error: EISDIR: illegal operation on a directory, read
    at Object.readSync (fs.js:568:3)
    at tryReadSync (fs.js:353:20)
    at Object.readFileSync (fs.js:390:19)
    at UnableToResolveError.buildCodeFrameMessage (./node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:348:17)
    at new UnableToResolveError (./node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:334:35)
    at ModuleResolver.resolveDependency (./node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:212:15)
    at DependencyGraph.resolveDependency (./node_modules/metro/src/node-haste/DependencyGraph.js:413:43)
    at ./node_modules/metro/src/lib/transformHelpers.js:317:42
    at ./node_modules/metro/src/Server.js:1471:14
    at Generator.next (<anonymous>)

You must cd into-react-native-project and run yarn start before build android or ios