React Material UI Button component not working-CodePudding

I have installed create-react-app and material-ui/core and have proceeded to make a simple Button.

After adding the Button to App file and using command npm start I'd expect the button to show in the browser, instead I get Error invalid hook call.

The only issue I could think of is the dependencies may be corrupt as the hook is clearly valid.

Here is the simple Button: App.js

import {Button} from '@material-ui/core';

export default function App() {
  return (
    <div className="App">
        <Button>Click Me</Button>
    </div>
  );
}

Index.js

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';

ReactDOM.render(
    <App />,
  document.getElementById('root')
);

Index.html

<div id='root'></div>

And here is the package.json file (dependencies only shown here to reduce code length):

{
  "name": "mui-play",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.15.1",
    "@testing-library/react": "^11.2.7",
    "@testing-library/user-event": "^12.8.3",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.1.2"
  }

CodePudding user response：

Solved: There was an issue with the dependencies, I learnt that even if you install an npm package you must still go to the terminal in the source code editor and install the dependency into the package.json file. Here is the fixed file that allows the button to be displayed in the browser: package.json:

  "name": "mui-play",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@material-ui/core": "^4.12.3",
    "@testing-library/jest-dom": "^5.15.1",
    "@testing-library/react": "^11.2.7",
    "@testing-library/user-event": "^12.8.3",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.1.2"
  }

The line "@material-ui/core": "^4.12.3", has been added so that the package can use the dependency.

CodePudding user response：

try by adding the packages you want manually and then run npm install on the terminal