Gets a selector function for a specific context.
The at() function returns a scoped selector where the scope is based on the
context property. Usually, you will use at() in a event handler that handles
events fired on an element contained in a repeater to get a selector with
repeated item scope. The returned function
selects the elements from the same repeater item where the event was fired.
An event context.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.