ResizeObserver
@Js
class ResizeObserver : Obj
ResizeObserver invokes a callback when Elem size is changed.
Create a new ResizeObserver instance
Disconnect this observer from all resize events for all nodes
Callback when an observed target size has been modified
Stop receiving resize events for given node
Register to receive resize events for given node
This disconnect()
Disconnect this observer from all resize events for all nodes.
new make()
Create a new ResizeObserver instance.
This observe(Elem target)
Register to receive resize events for given node.
Void onResize(|ResizeObserverEntry[]| callback)
Callback when an observed target size has been modified.
This unobserve(Elem target)
Stop receiving resize events for given node.