new Operatorsuper Keyword? : ), )if Statementdo-while Statementwhile Statementfor Statementfor-in, for-of, and for-await-of Statementscontinue Statementbreak Statementreturn Statementwith Statementswitch Statementthrow Statementtry Statementdebugger Statement?um/p1-90`以下の参照文書は、この文書の適用に不可欠です。日付付き参照については、引用された版のみが適用されます。日付なし参照については、参照文書の最新版（すべての修正を含む）が適用されます。
The Unicode Standard.
https://unicode.org/versions/latest
ISO/IEC 10646, Information Technology — Universal Multiple-Octet Coded Character Set (UCS) plus Amendment 1:2005, Amendment 2:2006, Amendment 3:2008, Amendment 4:2008, and additional amendments and corrigenda, or successor.
ECMA-402, ECMAScript Internationalization API Specification, specifically the annual edition corresponding to this edition of this specification.
https://www.ecma-international.org/publications-and-standards/standards/ecma-402/
ECMA-404, The JSON Data Interchange Format.
https://www.ecma-international.org/publications-and-standards/standards/ecma-404/