target = e.getTarget('a:not(.exi)', 3), what does it mean?

target = e.getTarget('a:not(.exi)', 3)
what does it mean?
the following code come from EXT EXAMPLE
onClick: function(e, target){alert(target);
if(target = e.getTarget('a:not(.exi)', 3)){
var cls = Ext.fly(target).getAttributeNS('ext', 'cls');
e.stopEvent();
if(cls){
var member = Ext.fly(target).getAttributeNS('ext', 'member');
this.loadClass(target.href, cls, member);
}else if(target.className == 'inner-link'){
this.getActiveTab().scrollToSection(target.href.split('#')[1]);
}else{
window.open(target.href);
}
}else if(target = e.getTarget('.micon', 2)){
e.stopEvent();
var tr = Ext.fly(target.parentNode);
if(tr.hasClass('expandable')){
tr.toggleClass('expanded');
}
}
},

It's a css selector, which looks for:

Anchor tags, that don't have the class name "exi", to a height of 3 above the current element.

to a height of 3 above the current element.
what does it mean?

<a ext:cls="Ext.util.JSON" ext:member="encode" href="output/Ext.util.JSON.html#encode">Ext.util.JSON.encode</a>

onClick: function(e, target){alert(target);
if(target = e.getTarget('a:not(.exi)', 3)){...
when you click the link,the alert window show 'http://localhost/ext/docs/output/Ext.util.JSON.html#encode'
why e.getTarget('a:not(.exi)', 3) ='http://localhost/ext/docs/output/Ext.util.JSON.html#encode'

You could always just get this info from the docs: http://extjs.com/deploy/dev/docs/?cl...mber=getTarget

Looked up the API doc.. but there's no lines explaining what is ".exi" or "height above" all about. Is this a new web geek[guru] jargon?

Quote:

---

Originally Posted by evant

You could always just get this info from the docs: http://extjs.com/deploy/dev/docs/?cl...mber=getTarget

---

DomeQuery API docs say "DomQuery supports most of the CSS3 selectors spec, along with some custom selectors and basic XPath."

And http://extjs.com/deploy/dev/docs/?cl...mber=getTarget actually tells you what the depth is.

All it says is that selector is a string???

selector : String (optional)A simple selector to filter the target or look for an ancestor of the target

No info regarding format, links to resources or even mention of CSS3 or XPATH