title: Dynamically add html on click on a amp webpage
body: <p>Is it possible to dynamically add HTML to a webpage on click when using AMP?</p>
  
  <p>Something along the lines of the </p>
  
  <pre><code>&lt;button on="tap:AMP.setState({foo: 'amp-bind'})"&gt;Say "Hello amp- 
  bind"&lt;/button&gt;
  
  &lt;div [text]="foo"&gt;This is the placeholder to append the new 
  content&lt;/div&gt;
  </code></pre>
  
  <p>But rather than text HTML?</p>