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  • Copyright & Software License

    Ecma International Rue du Rhone 114 CH-1204 Geneva Tel: +41 22 849 6000 Fax: +41 22 849 6001 Web: https://ecma-international.org/ Copyright Notice ALTERNATIVE COPYRIGHT NOTICE AND COPYRIGHT LICENSE © 2026 Ecma International By obtaining and/or copying this work, you (the licensee) agree that you have read, understood, and will comply with the following terms and conditions….

  •  Normative References

    The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEEE 754-2019, IEEE Standard for Floating-Point Arithmetic. The Unicode Standard.https://unicode.org/versions/latest ISO/IEC 10646, Information Technology — Universal Multiple-Octet Coded Character Set (UCS) plus Amendment 1:2005,…

  • 11 ECMAScript Language: Source Text

    11.1 Source Text Syntax SourceCharacter ::any Unicode code point ECMAScript source text is a sequence of Unicode code points. All Unicode code point values from U+0000 to U+10FFFF, including surrogate code points, may occur in ECMAScript source text where permitted by the ECMAScript grammars. The actual encodings used to store and interchange ECMAScript source text is not relevant…

  • Draft ECMA-262 / December 10, 2025

    ECMAScript® 2026 Language Specification About this Specification The document at https://tc39.es/ecma262/ is the most accurate and up-to-date ECMAScript specification. It contains the content of the most recent yearly snapshot plus any finished proposals (those that have reached Stage 4 in the proposal process and thus are implemented in several implementations and will be in the next practical revision) since that snapshot was taken….