Cannot find module 'warnOnce'

Question

When i upgrade my react-native version to 0.59.5 and i run webpack to create a bundle for my web app in the same folder app i get this error

  Module build failed (from ./node_modules/babel-loader/lib/index.js):
  Error: Cannot find module 'warnOnce'
  at Function.Module._resolveFilename 
  (internal/modules/cjs/loader.js:603:15)

I can't understand where is used this WarnOnce and how can i fix it ? Does someone face the same issue ? I did a cache clean and it still not working

Answer 1

Add resolver in module.exports in your metro.config.js and make sure it looks something like below.

const blacklist = require('metro-config/src/defaults/blacklist');

module.exports = {
  resolver: {
    blacklistRE: blacklist([
      /node_modules\/.*\/node_modules\/react-native\/.*/,
    ])
  },
  transformer: {
    getTransformOptions: async () => ({
      transform: {
        experimentalImportSupport: false,
        inlineRequires: false,
      },
    }),
  },
};