ECMAScript 2019 has finished and rolled out new exciting features for developers. The proposals which have been accepted and reached stage 4 by the TC39 committee would be included in the specification of that year and the others - are postponed to the next year.What that’s mentioned above is a part of the TC39 process - which is responsible to make changes and add features to the ECMAScript specification.Stage 0: StrawmanStage 1: ProposalsStage 2: DraftsStage 3: CandidatesStage 4: Finished/ApprovedHere are the links for you can see all the proposals on Stage 0, Stage 1 – 3 and Final Stage.Optional Catch BindingUntil this proposal, the specification forced us to bind…