title: How to watch .sss files and re-run my npm script if they change
body: <p>Is there a way to watch my .sss files and re-run this if they change?</p>
  
  <pre><code>"css": "postcss -u autoprefixer -u postcss-easy-import -p sugarss src/index.sss -o src/index.css"
  </code></pre>
  
  <p>I can't find a way, I've looked on the net all over.  I don't see any kind of watch available from postcss.  There's a -w or --watch with the postcss-cli but I tried adding that to the end of the script above.  Unless I'm just doing it wrong, my css script does not re-run itself if my .sss files change.</p>
  
  <p>maybe there's some generic node watcher lib I can use?</p>