title: How to deploy some functions to Cloud Functions for Firebase without affecting some other functions?
body: <p>When I run</p>
  
  <p><code>firebase deploy --only functions</code></p>
  
  <p>it reads the <code>index.js</code> file and updates all functions exported from that file. If on the previous deploy there was a function named <code>a</code>, and in the current deploy there is no such function, <code>a</code> will be deleted. </p>
  
  <p>In other words, the effect is the same as if all existing functions were deleted and then the all functions from the current <code>index.js</code> file were added.</p>
  
  <p>Is it possible to add/update/delete individual functions?</p>