Moving JS from Libraries to Polyfills
summary
Argues for shipping polyfills as a way to adopt new language features so teams can use features before the standard is finalized and before browsers implement them, with the goal to unify on a single set of tools instead of fragmenting into competing libraries; describes using polyfills at Facebook and in open source, reports on working through TC39 to push adoption, and notes the payoff: faster real use of language advances and converging tooling.
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