Absolutely!

You can declare something akin to a function, which takes arguments and emits HTML. Imagine e.g.

    let taskTemplate = template(task) {
         <div class="task">
              <span class="title">task.title</span>
         </div>
    }

    for (task in tasks) { taskTemplate(task) }

I'm not decided on syntax yet.

You can definitely separate out logic from template this way.

Fun outputs javascript, not HTML - the javascript then builds the DOM.