Object doesn't support property or method 'indexOf'

Question

I am using the below code:

Answer 1

The load function has been deprecated in 1.8 and removed in 3.0. Use the on method instead

From https://blog.jquery.com/2016/06/09/jquery-3-0-final-released/

Removed deprecated event aliases

.load, .unload, and .error, deprecated since jQuery 1.8, are no more. Use .on() to register listeners.