ECMAScript of the Future: ES2017 & Beyond
summary
ES2017 brings async functions and SharedArrayBuffer plus Atomics to enable true cross‑thread performance; the standards test suite has grown to 50,000 tests driving implementations. Upcoming proposals include true private fields (no reflective access), decorators, regex lookbehind and Unicode property escapes, named capture groups and the s flag, rest/spread for properties, optional chaining, numeric separators, the pipeline operator, and BigInt arbitrary-size integers for exact integer arithmetic.
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