title: an Emacs cursor movement hook, like the JavaScript mousemove event
body: <p>I want to track the "current word" in the current buffer. which another (networked) application will be aware of.</p>
  
  <p>I could do this by sending a request every time the cursor moves, whether from clicking or scrolling or arrowing or etc. i.e. any time the cursor's position in the buffer changes. </p>
  
  <p>e.g.</p>
  
  <pre><code>(add-hook 'cursor-move-hook 'post-request-with-current-word)
  </code></pre>