description

# Element.created constructor Null safety

Element.created()

Custom element creation constructor.

This constructor is used by the DOM when a custom element has been created. It can only be invoked by subclasses of Element from that classes created constructor.

    class CustomElement extends Element {
      factory CustomElement() => new Element.tag('x-custom');

      CustomElement.created() : super.created() {
         // Perform any element initialization.
      }
    }
    document.registerElement('x-custom', CustomElement);

## Implementation

    Element.created() : super._created();