title: Save and show input value in session storage
body: <p>I have input number and button with text on subpage.</p>
  
  <pre><code>&lt;input id="quantity" type="number"&gt;
  </code></pre>
  
  <p>I want to save value from input and show on button.</p>
  
  <pre><code>&lt;a id="button2" data-role="button"&gt;You have "value" coins&lt;/a&gt;
  </code></pre>
  
  <p>How i can do it?</p>