ReactJS this.state null

Question

Let me preface this by saying I am a novice to ReactJS. I am trying to learn by making a simple site that populates data using React. I have a JSON file that contains link d

Answer 1

More actual answer, for using ES7+ Classes:

export class Counter extends React.Component {
  state = { data : [] };
  ...
}

ES6 Classes (alredy was answered)

export class Component extends React.Component {
  constructor(props) {
    super(props);
    this.state = { data : [] };
  }
  ...
}