beforeremove

typedef

An event called only on component's elements before they are removed from the document if live binding is performing the removal. It can be listened to within a component's events object or on a component element with (event) bindings. This is an additional special event only on component elements. inserted and removed events are available on all elements.

`"{element} beforeremove": function(element, event)`

Listens to when the component element is removed.
This is commonly used for cleaning up and tearing down a component.

For example, the following might remove the component's ViewModel from a parent component's ViewModel:

events: {
    "{element} beforeremove": function(){
        canViewModel(this.element.parentNode)
            .removePanel(this.viewModel);
    }
}

Parameters

element {HTMLElement}:
The component element.
event {Event}:
The beforeremove event object.

`($beforeremove)="CALL_EXRESSION"`

Uses (event) bindings to listen for a component's beforeremove event.

<my-panel ($beforeremove)="removePanel(%viewModel)"/>

Parameters

CALL_EXRESSION {Call Expression}:
A call expression that calls some method when the event happens.