Common error handler for same type of Promise returning functions

common-fail-handle.js

aFunctionThatReturnPromise({ shiftid: event.shiftId, status: 'approve' })
.done(function () {
  //Do somehting when the promise succeeds
})
.fail(failHandler);


//Common function for fail handling
function failHandler(msg, res){
  alert(msg);
  console.log(res);
}