headerFooterBar.js onTap function, why is the depth 3?

ionic-v1
1

In function onTap of directive headerFooterBar.js :
https://github.com/driftyco/ionic/blob/master/js/angular/directive/headerFooterBar.js#L94

Why is the depth set to 3. Why do we want to check only 3 level for a element that is not to be scrolled. Could it not be more, and this should be in the documentation as well.

Please help me understand the logic.

Thanks

2

So say for instance, you have a search bar in your header, you wouldn’t want to scroll top when you tap it.

3

Thanks for getting back. My question is how the number 3 was chosen. We are moving from the clicked DOM element to outsite checking if its parent is one of button, input, textarea, select, i or not ? right ?

Then why do we chose to go and check for 3 parents only ?