1. @DomName('IntersectionObserver.observe')
  2. @DocsEditable()
  3. @Experimental()
void observe(Element target)

Source

@DomName('IntersectionObserver.observe')
@DocsEditable()
@Experimental() // untriaged
void observe(Element target) => _blink.BlinkIntersectionObserver.instance
    .observe_Callback_1_(this, target);