title: Angular error: "Can't bind to 'ngModel' since it isn't a known property of 'input'"
body: <p>I'm using Angular 4 and I am getting an error in the console:</p>
  
  <blockquote>
    <p>Can't bind to 'ngModel' since it isn't a known property of 'input'</p>
  </blockquote>
  
  <p>How can I resolve this?</p>