title: Angular2:getting event.target.value
body: <p>I want to get <code>event.target.value</code> by the codes below.</p>
  
  <pre><code>    &lt;input 
        mdInput 
        #owner
        required 
        placeholder="荷主" 
        [formControl]="detail.ownerTx" 
        [mdAutocomplete]="autoTxt" 
        (change)="detail.changeOwner(owner.value)"
       &gt;
  
     class Detail {
      changeOwner(val: string){
       console.log(val);
      }
     }
  </code></pre>
  
  <p>but the answer of the <code>console.log(val)</code> is nothing.... any idea to actually do the data-binding??</p>