You should avoid using this property in new code, and should instead use the
Event passed into the event handler function. This property is not universally supported and even when supported introduces potential fragility to your code.
Note: This property can be fragile, in that there may be situations in which the returned
Event is not the expected value. In addition,
Window.event is not accurate for events dispatched within shadow trees.
The definition of 'Window.event' in that specification.
|Living Standard||Initial definition.|
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