title: How to get content from new tweet before submit button is pressed?
body: <p>I have been wanting to develop chrome extensions for a while now (because of this idea I had with tweets). I want to be able to get the content of a new tweet before the "Tweet" button is pressed. </p>
  
  <p>I then pass this message through my own js logic, and either create a popup before submitting the tweet, or let the tweet post. </p>
  
  <p>Can this be achieved through a Google Chrome Extension? If so, how can I do this?</p>