title: How to add and remove single propertys to ngStyle?
body: <p>How can I add properties to an existing <strong>ngStyle</strong>-Attribute without setting it completely new? </p>
  
  <p>For now I found a workaround by setting [<code>style.float</code>] but in future I want to do something like my posted code.</p>
  
  <p>I tried it with: </p>
  
  <pre><code>obj.style = obj.style + { float: 'right' }
  </code></pre>
  
  <p>I searched with multiple Search Phrases. More and more I assume its not possible.</p>
  
  <pre class="lang-js prettyprint-override"><code>
  obj.style: { color: 'red' }
  
  &lt; .... [ngStyle]="obj.style"...&gt;
  
  
  public ButtonClickAddFloating(obj) {
  
  // Target: obj.style: { color: 'red', float: 'right' }
  
  }
  
  
  public ButtonClickRemoveFloating(obj) {
  
  // Target: obj.style: { color: 'red' }
  
  }
  
  
  
  </code></pre>