InterestEvent: source property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

The source read-only property of the InterestEvent interface is an Element object instance that represents the interest invoker element on which interest was shown or lost to fire the event.