導入
1 適用範囲
+2 適合性
1. 2.1 Normative Optional Clause Headingの例
2. 2.2 Legacy Clause Headingの例
3. 2.3 Legacy Normative Optional Clause Headingの例
3 規範的参照
+4 概要
1. 4.1 Webスクリプティング
2. 4.2 ホストと実装
3. +4.3 ECMAScriptの概要
  1. 4.3.1 オブジェクト
  2. 4.3.2 ECMAScriptのStrictバリアント
4. +4.4 用語と定義
5. 4.5 この仕様の構成
+5 記法上の慣例
1. +5.1 構文文法と字句文法
2. +5.2 アルゴリズムの慣例
+6 ECMAScriptのデータ型と値
1. +6.1 ECMAScript言語型
2. +6.2 ECMAScript仕様型
+7 抽象操作
1. +7.1 型変換
2. +7.2 テストおよび比較操作
3. +7.3 オブジェクト上の操作
4. +7.4 Iterator Objects上の操作
5. +7.5 Disposable オブジェクトに対する操作
+8 構文指向操作
1. 8.1 RS: Evaluation
2. +8.2 Scope Analysis
3. +8.3 ラベル
4. +8.4 関数名推論
5. +8.5 Contains
  1. 8.5.1 SS: Contains
  2. 8.5.2 SS: ComputedPropertyContains
6. +8.6 その他
+9 実行可能コードと実行コンテキスト
1. +9.1 Environment Records
  1. +9.1.1 Environment Record型階層
  2. +9.1.2 Environment Record操作
2. +9.2 PrivateEnvironment Records
  1. +9.2.1 PrivateEnvironment Record操作
    1. 9.2.1.1 NewPrivateEnvironment ( outerPrivateEnv )
    2. 9.2.1.2 ResolvePrivateIdentifier ( privateEnv, identifier )
3. +9.3 Realms
4. +9.4 Execution Contexts
5. +9.5 JobsおよびJobsをEnqueueするHost Operations
6. +9.6 Agents
7. 9.7 Agent Clusters
8. 9.8 Forward Progress
9. +9.9 WeakRefおよびFinalizationRegistry TargetsのProcessing Model
10. 9.10 ClearKeptObjects ( )
11. 9.11 AddToKeptObjects ( value )
12. 9.12 CleanupFinalizationRegistry ( finalizationRegistry )
13. 9.13 CanBeHeldWeakly ( arg )
+10 Ordinary ObjectsおよびExotic Objectsの振る舞い
1. +10.1 Ordinary Object Internal Methods and Internal Slots
2. +10.2 ECMAScript関数オブジェクト
3. +10.3 Built-in Function Objects
4. +10.4 Built-in Exotic Object Internal Methods and Slots
5. +10.5 Proxy Object Internal Methods and Internal Slots
+11 ECMAScript Language: Source Text
1. +11.1 Source Text
2. +11.2 Types of Source Code
+12 ECMAScript Language: Lexical Grammar
1. 12.1 Unicode Format-Control Characters
2. 12.2 White Space
3. 12.3 Line Terminators
4. 12.4 Comments
5. 12.5 Hashbang Comments
6. 12.6 Tokens
7. +12.7 Names and Keywords
  1. +12.7.1 Identifier Names
  2. 12.7.2 Keywords and Reserved Words
8. 12.8 Punctuators
9. +12.9 Literals
10. +12.10 Automatic Semicolon Insertion
+13 ECMAScript Language: Expressions
1. +13.1 Identifiers
2. +13.2 Primary Expression
3. +13.3 Left-Hand-Side Expressions
4. +13.4 Update Expressions
5. +13.5 Unary Operators
6. +13.6 Exponentiation Operator
  1. 13.6.1 RS: Evaluation
7. +13.7 Multiplicative Operators
  1. 13.7.1 RS: Evaluation
8. +13.8 Additive Operators
  1. +13.8.1 The Addition Operator ( + )
    1. 13.8.1.1 RS: Evaluation
  2. +13.8.2 The Subtraction Operator ( - )
    1. 13.8.2.1 RS: Evaluation
9. +13.9 Bitwise Shift Operators
10. +13.10 Relational Operators
  1. 13.10.1 RS: Evaluation
  2. 13.10.2 InstanceofOperator ( value, target )
11. +13.11 Equality Operators
  1. 13.11.1 RS: Evaluation
12. +13.12 Binary Bitwise Operators
  1. 13.12.1 RS: Evaluation
13. +13.13 Binary Logical Operators
  1. 13.13.1 RS: Evaluation
14. +13.14 Conditional Operator ( ? : )
  1. 13.14.1 RS: Evaluation
15. +13.15 Assignment Operators
16. +13.16 Comma Operator ( , )
  1. 13.16.1 RS: Evaluation
+14 ECMAScript Language: Statements and Declarations
1. +14.1 Statement Semantics
  1. 14.1.1 RS: Evaluation
2. +14.2 Block
3. +14.3 Declarations and the Variable Statement
4. +14.4 Empty Statement
  1. 14.4.1 RS: Evaluation
5. +14.5 Expression Statement
  1. 14.5.1 RS: Evaluation
6. +14.6 The if Statement
  1. 14.6.1 SS: Early Errors
  2. 14.6.2 RS: Evaluation
7. +14.7 Iteration Statements
8. +14.8 The continue Statement
  1. 14.8.1 SS: Early Errors
  2. 14.8.2 RS: Evaluation
9. +14.9 The break Statement
  1. 14.9.1 SS: Early Errors
  2. 14.9.2 RS: Evaluation
10. +14.10 The return Statement
  1. 14.10.1 RS: Evaluation
11. +14.11 The with Statement
  1. 14.11.1 SS: Early Errors
  2. 14.11.2 RS: Evaluation
12. +14.12 The switch Statement
13. +14.13 Labelled Statements
14. +14.14 The throw Statement
  1. 14.14.1 RS: Evaluation
15. +14.15 The try Statement
16. +14.16 The debugger Statement
  1. 14.16.1 RS: Evaluation
+15 ECMAScript Language: Functions and Classes
1. +15.1 Parameter Lists
2. +15.2 Function Definitions
3. +15.3 Arrow Function Definitions
4. +15.4 Method Definitions
5. +15.5 Generator Function Definitions
6. +15.6 Async Generator Function Definitions
7. +15.7 Class Definitions
8. +15.8 Async Function Definitions
9. +15.9 Async Arrow Function Definitions
10. +15.10 Tail Position Calls
+16 ECMAScript Language: Scripts and Modules
1. +16.1 Scripts
2. +16.2 Modules
+17 Error Handling and Language Extensions
1. 17.1 Forbidden Extensions
18 ECMAScript Standard Built-in Objects
+19 The Global Object
1. +19.1 Value Properties of the Global Object
2. +19.2 Function Properties of the Global Object
3. +19.3 Constructor Properties of the Global Object
4. +19.4 Other Properties of the Global Object
+20 Fundamental Objects
1. +20.1 Object Objects
2. +20.2 Function Objects
3. +20.3 Boolean Objects
4. +20.4 Symbol Objects
5. +20.5 Error Objects
+21 Numbers and Dates
1. +21.1 Number Objects
2. +21.2 BigInt Objects
3. +21.3 The Math Object
  1. +21.3.1 Value Properties of the Math Object
  2. +21.3.2 Function Properties of the Math Object
4. +21.4 Date Objects
+22 Text Processing
1. +22.1 String Objects
2. +22.2 RegExp（Regular Expression）Objects
+23 Indexed Collections
1. +23.1 Array Objects
2. +23.2 TypedArray Objects
3. +23.3 Uint8Arrayオブジェクト
+24 Keyed Collections
1. +24.1 Mapオブジェクト
2. +24.2 Setオブジェクト
3. +24.3 WeakMapオブジェクト
4. +24.4 WeakSetオブジェクト
5. +24.5 Keyed Collectionsの抽象操作
  1. 24.5.1 CanonicalizeKeyedCollectionKey ( key )
+25 構造化データ
1. +25.1 ArrayBufferオブジェクト
2. +25.2 SharedArrayBufferオブジェクト
3. +25.3 DataViewオブジェクト
4. +25.4 Atomicsオブジェクト
5. +25.5 JSONオブジェクト
+26 メモリ管理
1. +26.1 WeakRefオブジェクト
2. +26.2 FinalizationRegistryオブジェクト
+27 制御抽象オブジェクト
1. +27.1 反復
2. +27.2 リソース管理
  1. +27.2.1 共通リソース管理インターフェイス
    1. 27.2.1.1 Disposable インターフェイス
    2. 27.2.1.2 AsyncDisposable インターフェイス
3. +27.3 DisposableStack オブジェクト
4. +27.4 AsyncDisposableStack オブジェクト
5. +27.5 Promiseオブジェクト
6. +27.6 GeneratorFunctionオブジェクト
7. +27.7 AsyncGeneratorFunctionオブジェクト
8. +27.8 Generatorオブジェクト
9. +27.9 AsyncGeneratorオブジェクト
10. +27.10 AsyncFunctionオブジェクト
+28 Reflection
1. +28.1 Reflectオブジェクト
2. +28.2 Proxyオブジェクト
  1. +28.2.1 Proxyコンストラクタ
    1. 28.2.1.1 Proxy ( target, handler )
  2. +28.2.2 Proxyコンストラクタのプロパティ
    1. 28.2.2.1 Proxy.revocable ( target, handler )
3. +28.3 Module Namespaceオブジェクト
  1. 28.3.1 %Symbol.toStringTag%
+29 Memory Model
1. 29.1 Memory Modelの基礎
2. 29.2 Agent Events Records
3. 29.3 Chosen Value Records
4. 29.4 Candidate Executions
5. +29.5 Memory ModelのAbstract Operations
6. +29.6 Candidate ExecutionsのRelations
7. +29.7 Valid Executionsのプロパティ
8. 29.8 Races
9. 29.9 Data Races
10. 29.10 Data Race Freedom
11. 29.11 Shared Memory Guidelines
+Annex A (informative) Grammar Summary
1. A.1 Lexical Grammar
2. A.2 Expressions
3. A.3 Statements
4. A.4 Functions and Classes
5. A.5 Scripts and Modules
6. A.6 Number Conversions
7. A.7 Time Zone Offset String Format
8. A.8 Regular Expressions
+Annex B (normative) Webブラウザー向け追加ECMAScript機能
1. +B.1 追加Syntax
  1. B.1.1 HTML-like Comments
  2. +B.1.2 Regular Expressions Patterns
2. +B.2 追加Built-in Properties
3. +B.3 その他の追加Features
Annex C (informative) ECMAScriptのStrict Mode
+Annex D (informative) Host Layering Points
1. D.1 Host Hooks
2. D.2 Host-defined Fields
3. D.3 Host-defined Objects
4. D.4 Running Jobs
5. D.5 Exotic ObjectsのInternal Methods
6. D.6 Built-in Objects and Methods
Annex E (informative) 互換性に影響する可能性があるECMAScript 2015におけるCorrections and Clarifications
Annex F (informative) 以前のEditionsとのIncompatibilitiesをIntroduceするAdditions and Changes
Bibliography
Colophon
Copyright & Software License

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Bibliography

IEEE 754-2019: IEEE Standard for Floating-Point Arithmetic. Institute of Electrical and Electronic Engineers, New York (2019) Note

ECMA-262 specificationに影響するnormative changesは、IEEE 754-2008とIEEE 754-2019の間にない。
The Unicode Standard、<https://unicode.org/versions/latest>で入手可能
Unicode Technical Note #5: Canonical Equivalence in Applications、<https://unicode.org/notes/tn5/>で入手可能
Unicode Technical Standard #10: Unicode Collation Algorithm、<https://unicode.org/reports/tr10/>で入手可能
Unicode Standard Annex #15, Unicode Normalization Forms、<https://unicode.org/reports/tr15/>で入手可能
Unicode Standard Annex #18: Unicode Regular Expressions、<https://unicode.org/reports/tr18/>で入手可能
Unicode Standard Annex #24: Unicode Script Property、<https://unicode.org/reports/tr24/>で入手可能
Unicode Standard Annex #31, Unicode Identifiers and Pattern Syntax、<https://unicode.org/reports/tr31/>で入手可能
Unicode Standard Annex #44: Unicode Character Database、<https://unicode.org/reports/tr44/>で入手可能
Unicode Technical Standard #51: Unicode Emoji、<https://unicode.org/reports/tr51/>で入手可能
IANA Time Zone Database、<https://www.iana.org/time-zones>で入手可能
ISO 8601:2004(E) Data elements and interchange formats — Information interchange — Representation of dates and times
RFC 1738 “Uniform Resource Locators (URL)”、<https://tools.ietf.org/html/rfc1738>で入手可能
RFC 2396 “Uniform Resource Identifiers (URI): Generic Syntax”、<https://tools.ietf.org/html/rfc2396>で入手可能
RFC 3629 “UTF-8, a transformation format of ISO 10646”、<https://tools.ietf.org/html/rfc3629>で入手可能
RFC 7231 “Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content”、<https://tools.ietf.org/html/rfc7231>で入手可能