> make that more customizable
make what more customizable? what is "that"?
> list component how I can handle the click event
The click event on what? You should probably not be listening to the click event, instead listening to some state change (perhaps selected). However, you can provide the list component user content and listen to clicks that way:
<list items="{items}">
<li can-click="doSomething'>{{name</li>
</list>
I'm still not sure what you are saying.
Here's an example of listening to a state change: