[eeJah9to]

You can, using the template element: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/te...

I tried that for webcomponents, but I found more to my taste to actually have everything in my javascript file rather than to jump between files (it's not that messy if you keep your components smalls).

[Izkata]

I experimented with this some years ago, building my own mini-framework for components. The main system provided a global hook that javascript within the template file could attach itself to, so everything for a single component did exist in a single file. So it is doable.

(I liked that part of my system, but I'd rewrite about half of it if I wanted to use it again)

[clairity]

neat, i remember running across that a while back, but promptly forgot about it. thanks for the reminder!