Before looking at other solutions (I have a new ticket from you with another library), can you clarify what exactly it is you want with this filter input?
The field is for a price, and you want when people enter a large number it appears with a particular format (e.g. "11,500"), is that simply the issue?
So what specifically do you want the format to be? (Your previous message had spaces rather than commas.)
I tested it on my own site and I'm able to enter values like ="14,500" and submit the filter form and the value used in the filter is the numeric value 14500, as required.
You should just need to edit the field name, and you may need a more specific selector for the form, depending on whether there are other forms on the same page.
You have another custom function to format the number?
Your next reply is marked as private—you may want to create a temporary admin user for me to use that you can later delete. And be sure to have a current backup of your site, even though I don't intend to break anything.
Please give as many details as I need to find the View in question and see the problem.