Authors: @samuelgoto, @dimvar, @gbracha Early Reviewers: @adamk, @domenic, @waldemarhorwat, @erights, @slightlyoff, @dherman (mozilla), @avikchaudhuri (flow), @danielrosenwasser (typescript) This is a stage-0 proposal to add Optional Types to JS and bake them into the open web platform. For prior art (e.g. other languages, past proposals), alternatives considered (e.g. the status quo, gradual soun
