Accessing PropTypes via the main React package is deprecated

Question

I'm using redux but when I run my code I have this error:

Accessing PropTypes via the main React package is deprecated. Use the prop-types package from npm instead.

I install

npm i prop-types -S

but I I still have the same error.

./components/action/article.js

import * as ArticleActionTypes   from '../actiontypes/article';

export const AddArticle = (name, description, prix, image) => {
    return {
        type: ArticleActionTypes.ADD_ARTICLE,
        name, 
        description, 
        prix,
        image
    }
}

export const RemoveArticle = index => {
    return {
        type: ArticleActionTypes.REMOVE_ARTICLE,
        index
    }
}

./components/actiontypes/article.js

export const ADD_ARTICLE = 'article/ADD_ARTICLE';
export const REMOVE_ARTICLE = 'article/REMOVE_ARTICLE';
export const UPDATE_ARTICLE = 'article/UPDATE_ARTICLE';

./components/reducers/article.js

import * as ArticleActionTypes   from '../actiontypes/article';

const initialState = [
    {
        name: 'test',
        description: 'test',
        prix: 'test',
        image: 'url'
    },
    {
        name: 'test',
        description: 'test',
        prix: test,
        image: 'url'
    }
]

export default function Article (state=initialState, action){
    switch(action.type){
        case ArticleActionTypes.ADD_ARTICLE : 
            return [
                ...state,
                {
                    name: action.name,
                    description: action.description,
                    prix: action.prix,
                    image: action.image
                }
            ];
        case ArticleActionTypes.REMOVE_ARTICLE :
            return [
                ...state.slice(0, action.index),
                ...state.slice(action.index +1)
            ] ;
        default: return state;
    }
}

index.js

import React            from 'react';
import { render }       from 'react-dom';
import {Provider}       from 'react-redux';
import {createStore}    from 'redux';

import ArticleReducer   from './components/reducers/article';
import Scoreboard       from './components/containers/Scoreboard';

const store = createStore(
    ArticleReducer,
    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
)

render(<Provider>
            <Scoreboard store={store}/>
        </Provider>, document.getElementById('root'));

./components/containers/Scorboard.js

import React                            from 'react';
import {connect}                        from 'react-redux';
import {bindActionCreactors}            from 'redux';
import PropTypes                        from 'prop-types';

class Scoreboard extends React.Component {

    render(){
        return (
            <div>
              Scoreboard
            </div>
        )
    }
}

const mapStateToProps = state => {
    {
        articles :state 
    }
}

Scoreboard.propTypes = {
  articles: PropTypes.array.isRequired
}

export default connect(mapStateToProps)(Scoreboard);

Answer 1

As others have mentioned- if you have audited your own project for PropTypes uses but you're still seeing the warning- it's likely coming from an upstream dependency. One way you can track down the cause of this warning is by setting a debug breakpoint where it's logged and then stepping back to the caller. Here's a quick example recording I made:

(A higher-quality version is available here.)

Once you've identified the library in question, consider filing a Github issue (or better yet- a PR!) to inform the authors of the new warning.

In the meanwhile, this is only a dev-mode warning so it should not affect production usage of your application.