React - uncaught TypeError: Cannot read property 'setState' of undefined

Question

I am getting the following error

Uncaught TypeError: Cannot read property \'setState\' of undefined

even after binding delta in

Answer 1

Arrow function could have make your life more easier to avoid binding this keyword. Like so:

 delta = () => {
       this.setState({
           count : this.state.count++
      });
   }