How to update core-js to core-js 3 dependency

Question

While I was trying to install and setup react native  the precaution observed about the core-js version as update your core-js     to core-js 3 But don t know how to update my core-js     sudo react-native init AwesomeProject121 Password  This will walk you through creating a new React Native project in  Users amarnr1989 AwesomeProject121 Using yarn v1 13 0 Installing react-native    yarn add v1 13 0 info No lockfile found   1 4    Resolving packages    warning react-native  gt  create-react-class  gt  fbjs  gt  core-js 1 2 7  core-js  lt 2 6 5 is no longer maintained  Please  upgrade to core-js 3 or at least to actual version of core-js 2   2 4    Fetching packages     ----------------------------------------------------------------------------------------------------------------------------------------------------------  0 601internal modules cjs loader js 584     throw err         Error  Cannot find module   Users amarnr1989 AwesomeProject121 node modules react-native package json      at Function Module  resolveFilename  internal modules cjs loader js 582 15      at Function Module  load  internal modules cjs loader js 508 25      at Module require  internal modules cjs loader js 637 17      at require  internal modules cjs helpers js 22 18      at checkNodeVersion   usr local lib node modules react-native-cli index js 306 21      at run   usr local lib node modules react-native-cli index js 300 3      at createProject   usr local lib node modules react-native-cli index js 249 3      at init   usr local lib node modules react-native-cli index js 200 5      at Object  lt anonymous gt    usr local lib node modules react-native-cli index js 153 7      at Module  compile  internal modules cjs loader js 701 30    Please Suggest

User · Answer

For ng9 upgraders   npm i -g core-js  3    then   npm cache clean -f    followed by   npm i

User · Answer

With this  npm install --save core-js  3   you now get the error   core-js  lt 3 is no longer maintained and not recommended for usage due to the number of issues  Please  upgrade your dependencies to the actual version of core-js 3    so you might want to instead try  npm install --save core-js 3   if you re reading this post June 9 2020

User · Answer

How about reinstalling the node module  Go to the root directory of the project and remove the current node modules and install again   These are the commands   rm -rf node modules npm install  OR  npm uninstall -g react-native-cli and  npm install -g react-native-cli

User · Answer

Install npm i core-js  Modular standard library for JavaScript  Includes polyfills for ECMAScript up to 2019  promises  symbols  collections  iterators  typed arrays  many other features  ECMAScript proposals  some cross-platform WHATWG   W3C features and proposals like URL  You can load only required features or use it without global namespace pollution  Read  https   www npmjs com package core-js

User · Answer

For npm    npm install --save core-js  3   for yarn   yarn add core-js  3

User · Answer

You update core-js with the following command   npm install --save core-js  3   If you read the React Docs you will find that the command is derived from when you need to upgrade React itself

[react-native] How to update core-js to core-js@3 dependency?

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