web api instance property
Event: originalTarget property
Available in workers
The read-only originalTarget property of the Event interface returns the original target of the event before any retargetings. Unlike explicitOriginalTarget it can also be native anonymous content.
Specifications
This is a Mozilla-specific property and is not part of any current specification. It is not on track to become a standard.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.