jQuery UI slider - Cannot call method 'addClass' of undefined

Question

I had this old jQuery UI slider that had worked just fine a few months ago, but now I seem to be getting an exception reading: Cannot call method \'addClass\' of undefined.

Answer 1

Another possibility - this error can come up if the min or max are missing for the slider. If your startFiling or endFiling are not evaluating to a date, the slider code fails when trying to calculate the new handle position.