CODEWITHSUNDEEP
reactjsreact-domreact-proptypes
bigmugcup
bigmugcup

Reputation: 1351

Error: cannot find module object-assign after upgrading to react ^15.3 and react-dom ^15.3 for Proptypes warning

I have been getting the warning in my console about deprecation of Proptypes directly from React.

bundle.js:9748 Warning: Accessing PropTypes via the main React package is deprecated, and will be removed in  React v16.0. Use the latest available v15.* prop-types package from npm instead. For info on usage, compatibility, migration and more...

So, I installed prop-types per the Facebook github page, and migrated the code.

npm install --save prop-types

But the warning did not go away since I did not have React and React-dom 15.3 so I upgraded them both. After which, I got the error and my app stopped running:

Error: Cannot find module object-assign

I tried installing object-assign but that did not get rid of the error or get the app running again. 

npm install object-assign --save-dev

How can I fix this problem and get rid of the Proptypes console warning?

Upvotes: 2

Views: 4000

Answers (2)

bigmugcup
bigmugcup

Reputation: 1351

The error was due to a node module that was not fully upgraded. I searched the entire node modules directory using the search function on atom for "PropTypes } from 'react'" and react-router-dom came up. I upgraded the package to the most recent one and the warning was gone.

Upvotes: 1

Pranay Tripathi
Pranay Tripathi

Reputation: 1842

Well the warning seems like you are importing Proptypes directly from react rather than using prop-types. If you change to use the Proptypes from prop-types package/module, it should fix the issue.

Upvotes: 0

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