The SVGZoom event is fired when the zoom level of a document view is being changed, either through a direct user interaction or any change to the currentScale property available on the <svg> element interface. This event is only applicable to outermost svg elements and is dispatched after the zoom level modification has taken place. The target of the event is the <svg> element.
| Property | Type | Description | 
|---|---|---|
target Read only 
 |  EventTarget |  The event target (the topmost target in the DOM tree). | 
type Read only 
 |  DOMString |  The type of event. | 
bubbles Read only 
 |  Boolean |  Whether the event normally bubbles or not. | 
cancelable Read only 
 |  Boolean |  Whether the event is cancellable or not. | 
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    https://developer.mozilla.org/en-US/docs/Web/Events/SVGZoom