A [StackOverflow thread](https://stackoverflow.com/a/41992352) about this interface says it was introduced by Java way back in 1995, and copied by the first JavaScript implementation.
A [StackOverflow thread](https://stackoverflow.com/a/41992352) about this interface says it was introduced by Java way back in 1995, and copied by the first JavaScript implementation.
(We don't have Markdown formatting here, BTW. But thanks for the heads up, and welcome to YC.)