I am developing a React Native app. My code is error free, but it is facing build problems. I get an error in the Metro Bundler when I execute the command react-native run-android. The error says:
UnhandledPromiseRejectionWarning: Failed to start watch mode.
I also tried adding Watchman to node_modules using the command $yarn
add watchman.
I get a prompt that it is deprecated.
How should I solve the error?
My package.json contains the following:
"dependencies": {
"expo": "^25.0.0",
"native-base": "^2.3.7",
"react": "16.2.0",
"react-native": "0.52.0",
"react-native-vector-icons": "^4.5.0",
"react-navigation": "^1.0.0-beta.27",
"watchman": "^1.0.0"
}
"devDependencies": {
"babel-jest": "22.1.0",
"babel-preset-react-native": "4.0.0",
"jest": "22.1.3",
"react-test-renderer": "16.2.0"
}
To have watchman in windows do the following:
(1)Download watchman zip file from the link here
(2) Unzip the folder
(3) Place the watchman.exe file in the folder that is registered in the PATH (environment variable) (Eg: Place the watchman.exe file in C:/ProgramFiles/ and make sure the PATH = 'C:/ProgramFiles')
Done! You would never face this error again!