Extjs solves this by abstracting the dom. When you want to remove a component from its parent, you call the remove() method and it handles all the dom unbinding

Extjs solves this by abstracting the dom. When you want to remove a component from its parent, you call the remove() method and it handles all the dom unbinding behind the scenes. You never interact with the dom api directly. Adding content is done by calling the add() method of the parent and passing it a child component instance. It also decouples rendering from component construction. You can have an entire component hierarchy with operational events and fully interactive from the code's perspective, that isn't rendered to the dom at all.