Undefined is not an object (evaluating '_react.PropTypes.number'

Question

I have such error in React Native project,

Undefined is not an object (evaluating '_react.PropTypes.number'

I have new import of PropTypes in all project. Any ideas how to solve this issue?

Dyo · Accepted Answer · 2018-02-05 11:55:56Z

2

React.PropTypes has been moved from react package to prop-types package, you're probably using an outdated third party component that havn't made the necessary updates.

Edit : if this error is from your PropTypes declaration you have to use PropTypes.number instead of React.PropTypes.number

answered Feb 5, 2018 at 11:55

Dyo

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3 Comments

Lucky_girl Over a year ago

And how to found it in the project? I have searched in all project for the old import of PropTypes (import {PropTypes} from 'react';) and there was 0 matches, the same as 0 matches for React.PropTypes.number.

Dyo Over a year ago

You have to search in your node_modules too

Dyo Over a year ago

But it may have different syntax with spaces... You should try to identify what module is wrong by removing imports until it works or maybe you can find it by reading the error.

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