React Uncaught ReferenceError: process is not defined

reactjs

I am getting issue with iframe. Till today everything was working as expected. Today I added very simple Modal component and somehow iframe started appearing. It appears when I am editing file and hot reload is done. Also with this issue it's showing error in Console as "Uncaught ReferenceError: process is not defined". Can someone please help me with this?

import React, {useEffect} from 'react';
import ReactDOM from "react-dom";
import Close from "../static/assets/close-white.svg"

const trapStyles = {
    position: 'absolute',
    opacity: 0
}
const Test = () => {

    return ReactDOM.createPortal(
        <div data-react-modal-body-trap="" tabIndex="0" style={trapStyles}/>,
        document.getElementById("app")
    )
}

const Modal = ({ open, onClose, children }) => {

    useEffect(() => {

        if (open)document.getElementById("app").classList.add("ReactModal__Body--open");

        return () => {
            document.getElementById("app").classList.remove("ReactModal__Body--open")
        }
    })
    if (!open) return null

    return ReactDOM.createPortal(
        <>
            <Test />
            <div className="ReactModal__Overlay--after-open">
                <div className="modal-form-page"
                     tabIndex="-1" role="dialog" aria-modal="true">
                    <button onClick={onClose} className="close-modal">
                        <img id="close-button" alt="close" src={Close}/>
                    </button>
                    { children }
                </div>
            </div>
        </>,
        document.getElementById("ModalPortal")
    )
};

export default Modal;

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8"/>
    <link href="%PUBLIC_URL%/favicon.ico" rel="icon"/>
    <meta content="width=device-width, initial-scale=1" name="viewport"/>
    <meta content="#000000" name="theme-color"/>
    <link href="%PUBLIC_URL%/logo192.png" rel="apple-touch-icon"/>
    <link href="%PUBLIC_URL%/manifest.json" rel="manifest"/>
    <title>React App</title>
</head>
<body id="app">
<noscript>You need to enable javascript to run this website</noscript>
<div id="content">
<-- All other content render here -->
</div>
<div class="ReactModalPortal" id="ModalPortal"></div>
</body>
</html>

Uncaught ReferenceError: process is not defined
    at Object.4043 (<anonymous>:2:13168)
    at r (<anonymous>:2:306599)
    at Object.8048 (<anonymous>:2:9496)
    at r (<anonymous>:2:306599)
    at Object.8641 (<anonymous>:2:1379)
    at r (<anonymous>:2:306599)
    at <anonymous>:2:315627
    at <anonymous>:2:324225
    at <anonymous>:2:324229
    at HTMLIFrameElement.e.onload (index.js:1)
4043 @ VM128:2
r @ VM128:2
8048 @ VM128:2
r @ VM128:2
8641 @ VM128:2
r @ VM128:2
(anonymous) @ VM128:2
(anonymous) @ VM128:2
(anonymous) @ VM128:2
e.onload @ index.js:1
be @ index.js:1
he @ index.js:1
tryDismissErrorOverlay @ webpackHotDevClient.js:184
onHotUpdateSuccess @ webpackHotDevClient.js:109
handleApplyUpdates @ webpackHotDevClient.js:257
(anonymous) @ webpackHotDevClient.js:273
load (async)
be @ index.js:1
he @ index.js:1
tryDismissErrorOverlay @ webpackHotDevClient.js:184
onHotUpdateSuccess @ webpackHotDevClient.js:109
handleApplyUpdates @ webpackHotDevClient.js:257
(anonymous) @ webpackHotDevClient.js:273
Promise.then (async)
tryApplyUpdates @ webpackHotDevClient.js:271
handleSuccess @ webpackHotDevClient.js:106
push../node_modules/react-dev-utils/webpackHotDevClient.js.connection.onmessage @ webpackHotDevClient.js:203

Solution 1:

Upgrading to react-scripts v5 is not always the solution.

The full reason for this bug is described here. In short here is a brief summary:

The real culprit is react-error-overlay (which many people would never have heard of because it is a dependency of react-scripts). This package updated its dependencies to support webpack v5, and that version of webpack is not compatible with react-scripts v4.

If upgrading to react-scripts v5 is not working for you, you can also try another workaround which is to pin react-error-overlay to version 6.0.9:

Add this to your package.json

"resolutions": {
  "//": "See https://github.com/facebook/create-react-app/issues/11773",
  "react-error-overlay": "6.0.9"
}

Delete your yarn.lock or package-lock.json, then install your dependencies again.

Yet another (not so popular) workaround is to use a webpack plugin:

plugins:[
  new webpack.DefinePlugin({
      process: {env: {}}
  })
]

If you use craco, you just need to modify your craco.config.js file to add that plugin:

{
  ...
  webpack: {
    plugins: {
      add: [
        new webpack.DefinePlugin({
          process: {env: {}}
        })
      ]
    }
  }
}

This last method is not popular because not many CRA users ever have to touch webpack directly to work with react.

Solution 2:

The issue was solved by updating react-scripts to 5.0.0

Solution 3:

I tried updating react-scripts to 5.0.0, but that didn't work.

Solution: -

npm i -D [email protected]

React Uncaught ReferenceError: process is not defined

Solution 1:

Solution 2:

Solution 3:

Solution: -

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