Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
originalTarget property of the
Event interface returns the original target of the event before any retargetings. Unlike
Event.explicitOriginalTarget it can also be native anonymous content.
See also Comparison of Event Targets.
This is a Mozilla-specific property and is not part of any current specification. It is not on track to become a standard.
BCD tables only load in the browser