# JS Tip of the Day: Attribute Event Scopes
**URL:** https://forum.kirupa.com/t/js-tip-of-the-day-attribute-event-scopes/643139
**Category:** web dev
**Created:** [March 28, 2020, 1:57pm UTC](https://forum.kirupa.com/t/js-tip-of-the-day-attribute-event-scopes/643139 "2020-03-28T13:57:52Z")
**Posts on this page:** 1
**Page:** 1
**Attribute Event Scopes**
Level: Intermediate
We’ve seen how event attributes in HTML create functions in JavaScript that get assigned to the element’s respective event callback property. But there’s actually a lot more to how this function gets created than you may realize. Specifically, what you don’t see are the scopes involved in creating that function. Scopes determine what variables are available to the function that aren’t local to the function itself. All functions have access to the global scope, but they would also have access to any other scopes they were in when they were defined.
Unfortunately, you don’t exactly see how or where callback functions for attribute events are defined. So it’s not something you’d be able to identify through source code as you might be able to with your other functions. But that’s ok, because I’m about to show you exactly how it might look right now.
Here, we’re going to be using a `