title: Angular material 2 stepper - next step
body: <p>I have a simple stepper with two steps. </p>
  
  <p>On the first step there is a form with two radio inputs. I want to switch to the next step by clicking on one of the radio (without any submit buttons). I'm using <code>stepper.next()</code> method to achieve this.</p>
  
  <p>The problem is - it switching to the next step only after two clicks on the radio inputs. </p>
  
  <p>Is there any way to switch to the next step by clicking only once?</p>
  
  <p>Here's a demo with the problem <a href="https://angular-srtsoi.stackblitz.io" rel="noreferrer">https://angular-srtsoi.stackblitz.io</a></p>
  
  <p>Editor: <a href="https://stackblitz.com/edit/angular-srtsoi?embed=1&amp;file=app/stepper-overview-example.ts" rel="noreferrer">https://stackblitz.com/edit/angular-srtsoi?embed=1&amp;file=app/stepper-overview-example.ts</a></p>