React: 'state' is not defined no-undef

Question

I am currently going through an intro React course and get the following error when trying to compile my code:

src/App.js
  Line 6:5:  'state' is not defined  no-undef

Here is the code from my main React component:

import React from 'react';
import './App.css';
import Person from './Person/Person.js';

class App extends React.Component {
    state = {
      persons: [
        { name: 'Max', age: 28 },
        { name: 'Manu', age: 29 },
        { name: 'Stephanie', age: 26 }
      ],
      otherState: 'some other value'
    }

  render() {
    return (
      <div className="App">
        <h1>Does this work now?</h1>
        <p>This is really working</p>
        <button>Switch Name</button>
        <Person name={this.state.persons[0].name} age={this.state.persons[0].age}> My Hobbies: Racing</Person>
        <Person name={this.state.persons[1].name} age={this.state.persons[1].age}> My Hobbies: Racing</Person>
        <Person name={this.state.persons[2].name} age={this.state.persons[2].age}> My Hobbies: Racing</Person>
      </div>
    );
   // return React.createElement('div', {className: 'App'}, React.createElement('h1', null, 'does this work now'));
  }
}
export default App;

I have tried everything from copying the instructor's code exactly, to looking at other answers on Stack, but to no avail. Weirdly, the page loads correctly for a second, only to raise an error.

Any help would be hugely appreciated. Thank you.

Answer 1

Since you are using Class components, you have to add this . So it becomes this.state Also check out this guide manage state in react