ECMAScript Proposal, specs, and reference implementation for Map.prototype.upsert
Why do you think that https://github.com/tc39/proposal-set-methods is a good alternative to proposal-upsert
ECMAScript Proposal, specs, and reference implementation for Map.prototype.upsert
Why do you think that https://github.com/tc39/proposal-set-methods is a good alternative to proposal-upsert