title: How to automatically run a transcompiler when a JS file is changed/saved
body: <p>I'm coding an ES6 project with WebStorm (trial) at the moment which has a tool called 'File Watchers', which also conveniently includes a Traceur watcher transcompiling ES6 files when they change.</p>
  
  <p>Is there an equivalent functionality to the WebStorm 'File Watchers' tool incorporated into NetBeans?  Or a technique otherwise to execute a program when a source code file is changed/saved.</p>