title: Change button style with angularjs
body: <p>I have 3 buttons and I want change its style when the button was clicked. I don't know if angular has its own function like ng-class, ng-click or similar, but I not get it to works.</p>
  
  <pre><code>&lt;button class="btn1" ng-click="function1"&gt;&lt;/button&gt;
  &lt;button class="btn2" ng-click="function2"&gt;&lt;/button&gt;
  &lt;button class="btn3" ng-click="function3"&gt;&lt;/button&gt;
  </code></pre>
  
  <p>is possible call to another css class from js(in the function)? Thanks.</p>