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