title: Do not mutate state directly. Use setState()
body: <p>I see similar questions in this field but my question is different from these as i don't set state directly from this.state .
  my code is </p>
  
  <pre><code>state = {
  count: 0};
  
  handleIncrement = product =&gt; {
      console.log(product);
      this.setState({ count: ++this.state.count });
  };
  </code></pre>
  
  <p>as you see i don't set state directly but given me this error at this line</p>