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

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.

For npm

 npm install --save core-js@^3

for yarn

yarn add core-js@^3

For ng9 upgraders:

npm i -g core-js@^3

..then:

npm cache clean -f

..followed by:

npm i

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