title: get Elements By Class Name from other page
body: <p>I have this</p>
  
  <pre><code>console.log(document.getElementsByClassName('value')[0].innerHTML);
  </code></pre>
  
  <p>Is there possibility to get this value from other page (without manually open this page)?</p>
  
  <hr>
  
  <p>Can i get all value from page? Now when i use it i see only first value</p>