Do I need to unbind jquery event before remove element?

Question

I have a page using jquery-ui-dialog. Each time the dialog opens, page contents load in using ajax. Then it binds some event using jquery \"on()\". When the dialog close,

Answer 1

It's better to unbind but must.

Most browsers handle this correctly and remove those handlers themselves.

You can also see do-i-need-to-remove-event-listeners

Better way to handle this problem, you can use the Event Delegate.