ECMAScript Language Specification by Ecma International
= ECMAScript Language Specification by Ecma International
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https://tc39.es/ecma262/
Official editor draft, inspected heading ECMAScript 2027 Language Specification; not asserted to be a published 2027 edition. Overview, Hosts and Implementations; Array.prototype.map; Addition Operator and string concatenation semantics. Used for stable language examples and distinction from host-provided DOM facilities.