Jquery in React is not defined

Question

Hi I just want to receive ajax request, but the problem is that jquery is not defined in React. React version is 14.0

Error message

 Uncaught ReferenceError: $ is not defined

I have two files :

index.js

import React from 'react'; 
import { render } from 'react-dom';
import App from './containers/App';  

const root = document.getElementById('root');  

render( 
  <App source='https://api.github.com/users/octocat/gists' />, 
  root
);

app.js

import React, { Component } from 'react';

export default class App extends Component {

    componentDidMount() {
        const { source } = this.props;

        console.log($); // throws error
    }

    render() {
        return (
            <h1>Hey there.</h1>
        );
    }
}

Solution 1

Try add jQuery to your project, like

npm i jquery --save

or if you use bower

bower i jquery --save

then

import $ from 'jquery'; 

Solution 2

I just want to receive ajax request, but the problem is that jQuery is not defined in React.

Then don't use it. Use Fetch and have a look at Fetch polyfill in React not completely working in IE 11 to see example of alternative ways to get it running

Something like this

const that = this; 
fetch('http://jsonplaceholder.typicode.com/posts') 
  .then(function(response) { return response.json(); }) 
  .then(function(myJson) { 
     that.setState({data: myJson}); // for example
  });

Solution 3

It happens mostly when JQuery is not installed in your project. Install JQuery in your project by following commands according to your package manager.

Yarn

yarn add jquery

npm

npm i jquery --save

After this just import $ in your project file. import $ from 'jquery'

Solution 4

Isn't easier than doing like :

1- Install jquery in your project:

yarn add jquery

2- Import jquery and start playing with DOM:

import $ from 'jquery';

View more solutions

Comments

[Michael]

If you are using typescript with react, then use import * as $ from 'jquery'; instead. more info here stackoverflow.com/questions/35310361/…

[boandriy]

If you will get an error, try running: 1. yarn install. 2.yarn upgrade. 3.yarn add yarn. it solved all the problems for me.

[Emile Bergeron]

Thanks for the answer, this was really missing from this thread!

[Adrian B]

I get this error at the runtime: Uncaught TypeError: Cannot define property jQuery360080900754312289092, object is not extensible