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TypedArrays — ArrayBuffer, DataView, all 11 typed array types
BigInt prototype methods (toString, toString(radix), valueOf)
console.log variadic; document multi-arg
Error improvements — instanceof chain, stack property
Tagged template literals and String.raw
Date object (ES5) - Standard-Library.md: full Date API — constructors, static methods, get/set/format, invalid date note
Function.prototype methods (ES5) - Standard-Library.md: add Function section with call/apply/bind examples
Property descriptors and the Object API - Language.md: getter/setter syntax in object literals and class bodies; method shorthand - Standard-Library.md: full Object API coverage — defineProperty, getOwnPropertyDescriptor, getPrototypeOf/setPrototypeOf, freeze/seal/preventExtensions
Intl — getCanonicalLocales, Collator, NumberFormat, DateTimeFormat, DisplayNames, PluralRules
Proxy and Reflect — API reference and Language.md
BigInt — literals, arithmetic, typeof, BigInt() factory
WeakMap, WeakSet, WeakRef — document API
Symbol — document Symbol type, well-known symbols, typeof, iterator example
Promise combinators, finally, and AggregateError
Add full documentation — engine, language, standard library, REPL, permissions, resource limits, host objects, modules, debugger, bytecode