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GeezerVison is showing tc39.es (truncated) — ECMAScript® 2027 Language Specification

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    Table of Contents
    1. Introduction
    2. 1 Scope
    3. +2 Conformance
      1. 2.1 Example Normative Optional Clause Heading
      2. 2.2 Example Legacy Clause Heading
      3. 2.3 Example Legacy Normative Optional Clause Heading
    4. 3 Normative References
    5. +4 Overview
      1. 4.1 Web Scripting
      2. 4.2 Hosts and Implementations
      3. +4.3 ECMAScript Overview
        1. 4.3.1 Objects
        2. 4.3.2 The Strict Variant of ECMAScript
      4. 4.4 Organization of This Specification
    6. +5 Notational Conventions
      1. +5.1 Syntactic and Lexical Grammars
        1. 5.1.1 Context-Free Grammars
        2. 5.1.2 Parsing
        3. 5.1.3 The Lexical and RegExp Grammars
        4. 5.1.4 Runtime Grammars
        5. 5.1.5 The Syntactic Grammar
        6. +5.1.6 Grammar Notation
          1. 5.1.6.1 Terminal Symbols
          2. 5.1.6.2 Nonterminal Symbols and Productions
          3. 5.1.6.3 Optional Symbols
          4. 5.1.6.4 Grammatical Parameters
          5. 5.1.6.5 one of
          6. 5.1.6.6 [empty]
          7. 5.1.6.7 Lookahead Restrictions
          8. 5.1.6.8 [no LineTerminator here]
          9. 5.1.6.9 but not
          10. 5.1.6.10 Descriptive Phrases
      2. +5.2 Algorithm Conventions
        1. 5.2.1 Evaluation Order
        2. 5.2.2 Abstract Operations
        3. 5.2.3 Syntax-Directed Operations
        4. +5.2.4 Runtime Semantics
          1. 5.2.4.1 Completion ( completionRecord )
          2. 5.2.4.2 Throw
          3. 5.2.4.3 Shorthands for Unwrapping Completion Records
          4. 5.2.4.4 Implicit Normal Completion
        5. 5.2.5 Static Semantics
        6. 5.2.6 Mathematical Operations
        7. 5.2.7 Value Notation
        8. 5.2.8 Identity
    7. +6 ECMAScript Data Types and Values
      1. +6.1 ECMAScript Language Types
        1. 6.1.1 The Undefined Type
        2. 6.1.2 The Null Type
        3. 6.1.3 The Boolean Type
        4. +6.1.4 The String Type
          1. 6.1.4.1 StringIndexOf ( string, searchValue, fromIndex )
          2. 6.1.4.2 StringLastIndexOf ( string, searchValue, fromIndex )
        5. +6.1.5 The Symbol Type
          1. 6.1.5.1 Well-Known Symbols
        6. +6.1.6 Numeric Types
          1. +6.1.6.1 The Number Type
            1. 6.1.6.1.1 Number::unaryMinus ( number )
            2. 6.1.6.1.2 Number::bitwiseNOT ( number )
            3. 6.1.6.1.3 Number::exponentiate ( base, exponent )
            4. 6.1.6.1.4 Number::multiply ( x, y )
            5. 6.1.6.1.5 Number::divide ( x, y )
            6. 6.1.6.1.6 Number::remainder ( numerator, denominator )
            7. 6.1.6.1.7 Number::add ( x, y )
            8. 6.1.6.1.8 Number::subtract ( x, y )
            9. 6.1.6.1.9 Number::leftShift ( x, y )
            10. 6.1.6.1.10 Number::signedRightShift ( x, y )
            11. 6.1.6.1.11 Number::unsignedRightShift ( x, y )
            12. 6.1.6.1.12 Number::lessThan ( x, y )
            13. 6.1.6.1.13 Number::equal ( x, y )
            14. 6.1.6.1.14 Number::sameValue ( x, y )
            15. 6.1.6.1.15 Number::sameValueZero ( x, y )
            16. 6.1.6.1.16 NumberBitwiseOp ( op, x, y )
            17. 6.1.6.1.17 Number::bitwiseAND ( x, y )
            18. 6.1.6.1.18 Number::bitwiseXOR ( x, y )
            19. 6.1.6.1.19 Number::bitwiseOR ( x, y )
            20. 6.1.6.1.20 Number::toString ( x, radix )
          2. +6.1.6.2 The BigInt Type
            1. 6.1.6.2.1 BigInt::unaryMinus ( bigint )
            2. 6.1.6.2.2 BigInt::bitwiseNOT ( bigint )
            3. 6.1.6.2.3 BigInt::exponentiate ( base, exponent )
            4. 6.1.6.2.4 BigInt::multiply ( x, y )
            5. 6.1.6.2.5 BigInt::divide ( x, y )
            6. 6.1.6.2.6 BigInt::remainder ( numerator, denominator )
            7. 6.1.6.2.7 BigInt::add ( x, y )
            8. 6.1.6.2.8 BigInt::subtract ( x, y )
            9. 6.1.6.2.9 BigInt::leftShift ( x, y )
            10. 6.1.6.2.10 BigInt::signedRightShift ( x, y )
            11. 6.1.6.2.11 BigInt::unsignedRightShift ( x, y )
            12. 6.1.6.2.12 BigInt::lessThan ( x, y )
            13. 6.1.6.2.13 BigInt::equal ( x, y )
            14. 6.1.6.2.14 BigIntBitwiseOp ( op, x, y )
            15. 6.1.6.2.15 BigInt::bitwiseAND ( x, y )
            16. 6.1.6.2.16 BigInt::bitwiseXOR ( x, y )
            17. 6.1.6.2.17 BigInt::bitwiseOR ( x, y )
            18. 6.1.6.2.18 BigInt::toString ( x, radix )
        7. +6.1.7 The Object Type
          1. 6.1.7.1 Property Attributes
          2. 6.1.7.2 Object Internal Methods and Internal Slots
          3. 6.1.7.3 Invariants of the Essential Internal Methods
          4. 6.1.7.4 Well-Known Intrinsic Objects
      2. +6.2 ECMAScript Specification Types
        1. 6.2.1 The Enum Specification Type
        2. 6.2.2 The List and Record Specification Types
        3. 6.2.3 The Set and Relation Specification Types
        4. +6.2.4 The Completion Record Specification Type
          1. 6.2.4.1 NormalCompletion ( value )
          2. 6.2.4.2 ThrowCompletion ( value )
          3. 6.2.4.3 ReturnCompletion ( value )
          4. 6.2.4.4 UpdateEmpty ( completionRecord, value )
        5. +6.2.5 The Reference Record Specification Type
          1. 6.2.5.1 IsPropertyReference ( refRecord )
          2. 6.2.5.2 IsUnresolvableReference ( refRecord )
          3. 6.2.5.3 IsSuperReference ( refRecord )
          4. 6.2.5.4 IsPrivateReference ( refRecord )
          5. 6.2.5.5 GetValue ( refRecord )
          6. 6.2.5.6 PutValue ( refRecord, value )
          7. 6.2.5.7 GetThisValue ( refRecord )
          8. 6.2.5.8 InitializeReferencedBinding ( refRecord, value )
          9. 6.2.5.9 MakePrivateReference ( baseValue, privateIdentifier )
        6. +6.2.6 The Property Descriptor Specification Type
          1. 6.2.6.1 IsAccessorDescriptor ( propertyDesc )
          2. 6.2.6.2 IsDataDescriptor ( propertyDesc )
          3. 6.2.6.3 IsGenericDescriptor ( propertyDesc )
          4. 6.2.6.4 FromPropertyDescriptor ( propertyDesc )
          5. 6.2.6.5 ToPropertyDescriptor ( obj )
          6. 6.2.6.6 CompletePropertyDescriptor ( propertyDesc )
        7. 6.2.7 The Environment Record Specification Type
        8. 6.2.8 The Abstract Closure Specification Type
        9. +6.2.9 Data Blocks
          1. 6.2.9.1 CreateByteDataBlock ( size )
          2. 6.2.9.2 CreateSharedByteDataBlock ( size )
          3. 6.2.9.3 CopyDataBlockBytes ( toBlock, toIndex, fromBlock, fromIndex, count )
        10. 6.2.10 The PrivateElement Specification Type
        11. 6.2.11 The ClassFieldDefinition Record Specification Type
        12. 6.2.12 Private Names
        13. 6.2.13 The ClassStaticBlockDefinition Record Specification Type
    8. +7 Abstract Operations
      1. +7.1 Type Conversion
        1. +7.1.1 ToPrimitive ( input [ , preferredType ] )
          1. 7.1.1.1 OrdinaryToPrimitive ( obj, hint )
        2. 7.1.2 ToBoolean ( arg )
        3. 7.1.3 ToNumeric ( arg )
        4. +7.1.4 ToNumber ( arg )
          1. +7.1.4.1 ToNumber Applied to the String Type
            1. 7.1.4.1.1 StringToNumber ( string )
            2. 7.1.4.1.2 RS: StringNumericValue
            3. 7.1.4.1.3 RoundMVResult ( n )
        5. 7.1.5 ToIntegerOrInfinity ( arg )
        6. 7.1.6 SnapToInteger ( arg, nonIntHandling [ , minimum [ , maximum ] ] )
        7. 7.1.7 ToFixedSizeInteger ( int, signed, bitWidth )
        8. 7.1.8 ToInt32 ( arg )
        9. 7.1.9 ToUint32 ( arg )
        10. 7.1.10 ToInt16 ( arg )
        11. 7.1.11 ToUint16 ( arg )
        12. 7.1.12 ToInt8 ( arg )
        13. 7.1.13 ToUint8 ( arg )
        14. 7.1.14 ToUint8Clamp ( arg )
        15. 7.1.15 ToBigInt ( arg )
        16. +7.1.16 StringToBigInt ( string )
          1. 7.1.16.1 StringIntegerLiteral Grammar
          2. 7.1.16.2 RS: MV
        17. 7.1.17 ToBigInt64 ( arg )
        18. 7.1.18 ToBigUint64 ( arg )
        19. 7.1.19 ToString ( arg )
        20. 7.1.20 ToObject ( arg )
        21. 7.1.21 ToPropertyKey ( arg )
        22. 7.1.22 ToLength ( arg )
        23. 7.1.23 CanonicalNumericIndexString ( arg )
        24. 7.1.24 ToIndex ( arg )
        25. 7.1.25 ToAbsoluteIndex ( value, length )
        26. 7.1.26 ToClampedIndex ( value, length )
      2. +7.2 Testing and Comparison Operations
        1. 7.2.1 RequireObjectCoercible ( arg )
        2. 7.2.2 IsArray ( arg )
        3. 7.2.3 IsCallable ( arg )
        4. 7.2.4 IsConstructor ( arg )
        5. 7.2.5 IsExtensible ( obj )
        6. 7.2.6 IsRegExp ( arg )
        7. 7.2.7 SS: IsStringWellFormedUnicode ( string )
        8. 7.2.8 SameType ( x, y )
        9. 7.2.9 SameValue ( x, y )
        10. 7.2.10 SameValueZero ( x, y )
        11. 7.2.11 SameValueNonNumber ( x, y )
        12. 7.2.12 IsLessThan ( x, y, leftFirst )
        13. 7.2.13 IsLooselyEqual ( x, y )
        14. 7.2.14 IsStrictlyEqual ( x, y )
      3. +7.3 Operations on Objects
        1. 7.3.1 MakeBasicObject ( internalSlotsList )
        2. 7.3.2 Get ( obj, propertyKey )
        3. 7.3.3 GetV ( value, propertyKey )
        4. 7.3.4 Set ( obj, propertyKey, value, throw )
        5. 7.3.5 CreateDataProperty ( obj, propertyKey, value )
        6. 7.3.6 CreateDataPropertyOrThrow ( obj, propertyKey, value )
        7. 7.3.7 CreateNonEnumerableDataPropertyOrThrow ( obj, propertyKey, value )
        8. 7.3.8 DefinePropertyOrThrow ( obj, propertyKey, propertyDesc )
        9. 7.3.9 DeletePropertyOrThrow ( obj, propertyKey )
        10. 7.3.10 GetMethod ( value, propertyKey )
        11. 7.3.11 HasProperty ( obj, propertyKey )
        12. 7.3.12 HasOwnProperty ( obj, propertyKey )
        13. 7.3.13 Call ( func, thisValue [ , argList ] )
        14. 7.3.14 Construct ( ctor [ , argList [ , newTarget ] ] )
        15. 7.3.15 SetIntegrityLevel ( obj, level )
        16. 7.3.16 TestIntegrityLevel ( obj, level )
        17. 7.3.17 CreateArrayFromList ( elements )
        18. 7.3.18 LengthOfArrayLike ( obj )
        19. 7.3.19 CreateListFromArrayLike ( obj [ , validElementTypes ] )
        20. 7.3.20 Invoke ( value, propertyKey [ , argList ] )
        21. 7.3.21 OrdinaryHasInstance ( ctor, instance )
        22. 7.3.22 SpeciesConstructor ( obj, defaultCtor )
        23. 7.3.23 EnumerableOwnProperties ( obj, kind )
        24. 7.3.24 GetFunctionRealm ( func )
        25. 7.3.25 CopyDataProperties ( target, source, excludedItems )
        26. 7.3.26 PrivateElementFind ( obj, privateName )
        27. 7.3.27 PrivateFieldAdd ( obj, privateName, value )
        28. 7.3.28 PrivateMethodOrAccessorAdd ( obj, method )
        29. 7.3.29 HostEnsureCanAddPrivateElement ( obj )
        30. 7.3.30 PrivateGet ( obj, privateName )
        31. 7.3.31 PrivateSet ( obj, privateName, value )
        32. 7.3.32 DefineField ( receiver, fieldRecord )
        33. 7.3.33 InitializeInstanceElements ( obj, ctor )
        34. 7.3.34 AddValueToKeyedGroup ( groups, key, value )
        35. 7.3.35 GroupBy ( items, callback, keyCoercion )
        36. 7.3.36 GetOptionsObject ( options )
        37. 7.3.37 SetterThatIgnoresPrototypeProperties ( thisValue, home, propertyKey, value )
      4. +7.4 Operations on Iterator Objects
        1. 7.4.1 Iterator Records
        2. 7.4.2 GetIteratorDirect ( obj )
        3. 7.4.3 GetIteratorFromMethod ( obj, method )
        4. 7.4.4 GetIterator ( obj, kind )
        5. 7.4.5 GetIteratorFlattenable ( obj, primitiveHandling )
        6. 7.4.6 IteratorNext ( iteratorRecord [ , value ] )
        7. 7.4.7 IteratorComplete ( iteratorResult )
        8. 7.4.8 IteratorValue ( iteratorResult )
        9. 7.4.9 IteratorStep ( iteratorRecord )
        10. 7.4.10 IteratorStepValue ( iteratorRecord )
        11. 7.4.11 IteratorClose ( iteratorRecord, completion )
        12. 7.4.12 IteratorCloseAll ( iterators, completion )
        13. 7.4.13 IfAbruptCloseIterator ( value, iteratorRecord )
        14. 7.4.14 IfAbruptCloseIterators ( value, iteratorRecords )
        15. 7.4.15 AsyncIteratorClose ( iteratorRecord, completion )
        16. 7.4.16 IfAbruptCloseAsyncIterator ( value, iteratorRecord )
        17. 7.4.17 CreateIteratorResultObject ( value, done )
        18. 7.4.18 CreateListIteratorRecord ( list )
        19. 7.4.19 IteratorToList ( iteratorRecord )
      5. +7.5 Operations on Disposable Objects
        1. 7.5.1 DisposableResource Records
        2. 7.5.2 AddDisposableResource ( disposableResourceStack, value, kind [ , method ] )
        3. 7.5.3 GetDisposeMethod ( value, kind )
        4. 7.5.4 DisposeResources ( disposableResourceStack, completion )
    9. +8 Syntax-Directed Operations
      1. 8.1 RS: Evaluation
      2. +8.2 Scope Analysis
        1. 8.2.1 SS: BoundNames
        2. 8.2.2 SS: DeclarationPart
        3. 8.2.3 SS: IsConstantDeclaration
        4. 8.2.4 SS: IsUsingDeclaration
        5. 8.2.5 SS: IsAwaitUsingDeclaration
        6. 8.2.6 SS: LexicallyDeclaredNames
        7. 8.2.7 SS: LexicallyScopedDeclarations
        8. 8.2.8 SS: VarDeclaredNames
        9. 8.2.9 SS: VarScopedDeclarations
        10. 8.2.10 SS: TopLevelLexicallyDeclaredNames
        11. 8.2.11 SS: TopLevelLexicallyScopedDeclarations
        12. 8.2.12 SS: TopLevelVarDeclaredNames
        13. 8.2.13 SS: TopLevelVarScopedDeclarations
      3. +8.3 Labels
        1. 8.3.1 SS: ContainsDuplicateLabels
        2. 8.3.2 SS: ContainsUndefinedBreakTarget
        3. 8.3.3 SS: ContainsUndefinedContinueTarget
      4. +8.4 Function Name Inference
        1. 8.4.1 SS: HasName
        2. 8.4.2 SS: IsFunctionDefinition
        3. 8.4.3 SS: IsAnonymousFunctionDefinition ( expr )
        4. 8.4.4 SS: IsIdentifierRef
        5. 8.4.5 RS: NamedEvaluation
      5. +8.5 Contains
        1. 8.5.1 SS: Contains
        2. 8.5.2 SS: ComputedPropertyContains
      6. +8.6 Miscellaneous
        1. 8.6.1 RS: InstantiateFunctionDeclaration
        2. +8.6.2 RS: BindingInitialization
          1. 8.6.2.1 InitializeBoundName ( name, value, envRecord )
        3. 8.6.3 RS: IteratorBindingInitialization
        4. 8.6.4 SS: AssignmentTargetType
        5. 8.6.5 SS: PropName
        6. 8.6.6 SS: ContainsUsing
    10. +9 Executable Code and Execution Contexts
      1. +9.1 Environment Records
        1. +9.1.1 The Environment Record Type Hierarchy
          1. +9.1.1.1 Declarative Environment Records
            1. 9.1.1.1.1 HasBinding ( name )
            2. 9.1.1.1.2 CreateMutableBinding ( name, deletable )
            3. 9.1.1.1.3 CreateImmutableBinding ( name, strict )
            4. 9.1.1.1.4 InitializeBinding ( name, value )
            5. 9.1.1.1.5 SetMutableBinding ( name, value, strict )
            6. 9.1.1.1.6 GetBindingValue ( name, strict )
            7. 9.1.1.1.7 DeleteBinding ( name )
            8. 9.1.1.1.8 HasThisBinding ( )
            9. 9.1.1.1.9 GetThisBinding ( )
            10. 9.1.1.1.10 HasSuperBinding ( )
            11. 9.1.1.1.11 WithBaseObject ( )
          2. +9.1.1.2 Object Environment Records
            1. 9.1.1.2.1 HasBinding ( name )
            2. 9.1.1.2.2 CreateMutableBinding ( name, deletable )
            3. 9.1.1.2.3 CreateImmutableBinding ( name, strict )
            4. 9.1.1.2.4 InitializeBinding ( name, value )
            5. 9.1.1.2.5 SetMutableBinding ( name, value, strict )
            6. 9.1.1.2.6 GetBindingValue ( name, strict )
            7. 9.1.1.2.7 DeleteBinding ( name )
            8. 9.1.1.2.8 HasThisBinding ( )
            9. 9.1.1.2.9 GetThisBinding ( )
            10. 9.1.1.2.10 HasSuperBinding ( )
            11. 9.1.1.2.11 WithBaseObject ( )
          3. +9.1.1.3 Function Environment Records
            1. 9.1.1.3.1 BindThisValue ( envRecord, value )
            2. 9.1.1.3.2 HasThisBinding ( )
            3. 9.1.1.3.3 GetThisBinding ( )
            4. 9.1.1.3.4 HasSuperBinding ( )
            5. 9.1.1.3.5 GetSuperBase ( envRecord )
          4. +9.1.1.4 Global Environment Records
            1. 9.1.1.4.1 HasBinding ( name )
            2. 9.1.1.4.2 CreateMutableBinding ( name, deletable )
            3. 9.1.1.4.3 CreateImmutableBinding ( name, strict )
            4. 9.1.1.4.4 InitializeBinding ( name, value )
            5. 9.1.1.4.5 SetMutableBinding ( name, value, strict )
            6. 9.1.1.4.6 GetBindingValue ( name, strict )
            7. 9.1.1.4.7 DeleteBinding ( name )
            8. 9.1.1.4.8 HasThisBinding ( )
            9. 9.1.1.4.9 GetThisBinding ( )
            10. 9.1.1.4.10 HasSuperBinding ( )
            11. 9.1.1.4.11 WithBaseObject ( )
            12. 9.1.1.4.12 HasLexicalDeclaration ( envRecord, name )
            13. 9.1.1.4.13 HasRestrictedGlobalProperty ( envRecord, name )
            14. 9.1.1.4.14 CanDeclareGlobalVar ( envRecord, name )
            15. 9.1.1.4.15 CanDeclareGlobalFunction ( envRecord, name )
            16. 9.1.1.4.16 CreateGlobalVarBinding ( envRecord, name, deletable )
            17. 9.1.1.4.17 CreateGlobalFunctionBinding ( envRecord, name, value, deletable )
          5. +9.1.1.5 Module Environment Records
            1. 9.1.1.5.1 GetBindingValue ( name, strict )
            2. 9.1.1.5.2 DeleteBinding ( name )
            3. 9.1.1.5.3 HasThisBinding ( )
            4. 9.1.1.5.4 GetThisBinding ( )
            5. 9.1.1.5.5 CreateImportBinding ( envRecord, name, targetModule, targetName )
        2. +9.1.2 Environment Record Operations
          1. 9.1.2.1 GetIdentifierReference ( envRecord, name, strict )
          2. 9.1.2.2 NewDeclarativeEnvironment ( outerEnv )
          3. 9.1.2.3 NewObjectEnvironment ( obj, isWithEnv, outerEnv )
          4. 9.1.2.4 NewFunctionEnvironment ( func, newTarget )
          5. 9.1.2.5 NewGlobalEnvironment ( obj, thisValue )
          6. 9.1.2.6 NewModuleEnvironment ( outerEnv )
      2. +9.2 PrivateEnvironment Records
        1. +9.2.1 PrivateEnvironment Record Operations
          1. 9.2.1.1 NewPrivateEnvironment ( outerPrivateEnv )
          2. 9.2.1.2 ResolvePrivateIdentifier ( privateEnv, identifier )
      3. +9.3 Realms
        1. 9.3.1 InitializeHostDefinedRealm ( )
        2. 9.3.2 CreateIntrinsics ( realmRecord )
        3. 9.3.3 SetDefaultGlobalBindings ( realmRecord )
      4. +9.4 Execution Contexts
        1. 9.4.1 GetActiveScriptOrModule ( )
        2. 9.4.2 ResolveBinding ( name [ , envRecord ] )
        3. 9.4.3 GetThisEnvironment ( )
        4. 9.4.4 ResolveThisBinding ( )
        5. 9.4.5 GetNewTarget ( )
        6. 9.4.6 GetGlobalObject ( )
        7. 9.4.7 RunSuspendedContext ( context, completionRecord )
        8. 9.4.8 RunCallerContext ( value )
      5. +9.5 Jobs and Host Operations to Enqueue Jobs
        1. 9.5.1 JobCallback Records
        2. 9.5.2 HostMakeJobCallback ( callback )
        3. 9.5.3 HostCallJobCallback ( jobCallback, thisValue, argList )
        4. 9.5.4 HostEnqueueGenericJob ( job, realm )
        5. 9.5.5 HostEnqueuePromiseJob ( job, realm )
        6. 9.5.6 HostEnqueueTimeoutJob ( timeoutJob, realm, milliseconds )
      6. +9.6 Agents
        1. 9.6.1 AgentSignifier ( )
        2. 9.6.2 AgentCanSuspend ( )
        3. 9.6.3 IncrementModuleAsyncEvaluationCount ( )
      7. 9.7 Agent Clusters
      8. 9.8 Forward Progress
      9. +9.9 Processing Model of WeakRef and FinalizationRegistry Targets
        1. 9.9.1 Objectives
        2. 9.9.2 Liveness
        3. 9.9.3 Execution
        4. +9.9.4 Host Hooks
          1. 9.9.4.1 HostEnqueueFinalizationRegistryCleanupJob ( finalizationRegistry )
      10. 9.10 ClearKeptObjects ( )
      11. 9.11 AddToKeptObjects ( value )
      12. 9.12 CleanupFinalizationRegistry ( finalizationRegistry )
      13. 9.13 CanBeHeldWeakly ( arg )
    11. +10 Ordinary and Exotic Objects Behaviours
      1. +10.1 Ordinary Object Internal Methods and Internal Slots
        1. +10.1.1 [[GetPrototypeOf]] ( )
          1. 10.1.1.1 OrdinaryGetPrototypeOf ( obj )
        2. +10.1.2 [[SetPrototypeOf]] ( proto )
          1. 10.1.2.1 OrdinarySetPrototypeOf ( obj, proto )
        3. +10.1.3 [[IsExtensible]] ( )
          1. 10.1.3.1 OrdinaryIsExtensible ( obj )
        4. +10.1.4 [[PreventExtensions]] ( )
          1. 10.1.4.1 OrdinaryPreventExtensions ( obj )
        5. +10.1.5 [[GetOwnProperty]] ( propertyKey )
          1. 10.1.5.1 OrdinaryGetOwnProperty ( obj, propertyKey )
        6. +10.1.6 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          1. 10.1.6.1 OrdinaryDefineOwnProperty ( obj, propertyKey, propertyDesc )
          2. 10.1.6.2 IsCompatiblePropertyDescriptor ( extensible, propertyDesc, current )
          3. 10.1.6.3 ValidateAndApplyPropertyDescriptor ( obj, propertyKey, extensible, propertyDesc, current )
        7. +10.1.7 [[HasProperty]] ( propertyKey )
          1. 10.1.7.1 OrdinaryHasProperty ( obj, propertyKey )
        8. +10.1.8 [[Get]] ( propertyKey, receiver )
          1. 10.1.8.1 OrdinaryGet ( obj, propertyKey, receiver )
        9. +10.1.9 [[Set]] ( propertyKey, value, receiver )
          1. 10.1.9.1 OrdinarySet ( obj, propertyKey, value, receiver )
          2. 10.1.9.2 OrdinarySetWithOwnDescriptor ( obj, propertyKey, value, receiver, ownDesc )
        10. +10.1.10 [[Delete]] ( propertyKey )
          1. 10.1.10.1 OrdinaryDelete ( obj, propertyKey )
        11. +10.1.11 [[OwnPropertyKeys]] ( )
          1. 10.1.11.1 OrdinaryOwnPropertyKeys ( obj )
        12. 10.1.12 OrdinaryObjectCreate ( proto [ , additionalInternalSlotsList ] )
        13. 10.1.13 OrdinaryCreateFromConstructor ( ctor, intrinsicDefaultProto [ , internalSlotsList ] )
        14. 10.1.14 GetPrototypeFromConstructor ( ctor, intrinsicDefaultProto )
        15. 10.1.15 RequireInternalSlot ( obj, internalSlot )
      2. +10.2 ECMAScript Function Objects
        1. +10.2.1 [[Call]] ( thisArg, argList )
          1. 10.2.1.1 PrepareForOrdinaryCall ( func, newTarget )
          2. 10.2.1.2 OrdinaryCallBindThis ( func, calleeContext, thisArg )
          3. 10.2.1.3 RS: EvaluateBody
          4. 10.2.1.4 OrdinaryCallEvaluateBody ( func, argList )
        2. 10.2.2 [[Construct]] ( argList, newTarget )
        3. 10.2.3 OrdinaryFunctionCreate ( proto, sourceText, paramList, body, thisMode, envRecord, privateEnv )
        4. +10.2.4 AddRestrictedFunctionProperties ( func, realm )
          1. 10.2.4.1 %ThrowTypeError% ( )
        5. 10.2.5 MakeConstructor ( func [ , writableProto [ , proto ] ] )
        6. 10.2.6 MakeClassConstructor ( func )
        7. 10.2.7 MakeMethod ( func, homeObj )
        8. 10.2.8 DefineMethodProperty ( homeObj, name, closure, enumerable )
        9. 10.2.9 SetFunctionName ( func, name [ , prefix ] )
        10. 10.2.10 SetFunctionLength ( func, length )
        11. 10.2.11 FunctionDeclarationInstantiation ( func, argList )
      3. +10.3 Built-in Function Objects
        1. 10.3.1 [[Call]] ( thisArg, argList )
        2. 10.3.2 [[Construct]] ( argList, newTarget )
        3. 10.3.3 BuiltinCallOrConstruct ( func, thisArg, argList, newTarget )
        4. 10.3.4 CreateBuiltinFunction ( behaviour, length, name, additionalInternalSlotsList [ , realm [ , proto [ , prefix [ , async ] ] ] ] )
      4. +10.4 Built-in Exotic Object Internal Methods and Slots
        1. +10.4.1 Bound Function Exotic Objects
          1. 10.4.1.1 [[Call]] ( thisArg, argList )
          2. 10.4.1.2 [[Construct]] ( argList, newTarget )
          3. 10.4.1.3 BoundFunctionCreate ( targetFunc, boundThis, boundArgs )
        2. +10.4.2 Array Exotic Objects
          1. 10.4.2.1 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          2. 10.4.2.2 ArrayCreate ( length [ , proto ] )
          3. 10.4.2.3 ArraySpeciesCreate ( originalArray, length )
          4. 10.4.2.4 ArraySetLength ( array, propertyDesc )
        3. +10.4.3 String Exotic Objects
          1. 10.4.3.1 [[GetOwnProperty]] ( propertyKey )
          2. 10.4.3.2 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          3. 10.4.3.3 [[OwnPropertyKeys]] ( )
          4. 10.4.3.4 StringCreate ( value, proto )
          5. 10.4.3.5 StringGetOwnProperty ( string, propertyKey )
        4. +10.4.4 Arguments Exotic Objects
          1. 10.4.4.1 [[GetOwnProperty]] ( propertyKey )
          2. 10.4.4.2 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          3. 10.4.4.3 [[Get]] ( propertyKey, receiver )
          4. 10.4.4.4 [[Set]] ( propertyKey, value, receiver )
          5. 10.4.4.5 [[Delete]] ( propertyKey )
          6. 10.4.4.6 CreateUnmappedArgumentsObject ( argList )
          7. +10.4.4.7 CreateMappedArgumentsObject ( func, formals, argList, envRecord )
            1. 10.4.4.7.1 MakeArgGetter ( name, envRecord )
            2. 10.4.4.7.2 MakeArgSetter ( name, envRecord )
        5. +10.4.5 TypedArray Exotic Objects
          1. 10.4.5.1 [[PreventExtensions]] ( )
          2. 10.4.5.2 [[GetOwnProperty]] ( propertyKey )
          3. 10.4.5.3 [[HasProperty]] ( propertyKey )
          4. 10.4.5.4 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          5. 10.4.5.5 [[Get]] ( propertyKey, receiver )
          6. 10.4.5.6 [[Set]] ( propertyKey, value, receiver )
          7. 10.4.5.7 [[Delete]] ( propertyKey )
          8. 10.4.5.8 [[OwnPropertyKeys]] ( )
          9. 10.4.5.9 TypedArray With Buffer Witness Records
          10. 10.4.5.10 MakeTypedArrayWithBufferWitnessRecord ( obj, order )
          11. 10.4.5.11 TypedArrayCreate ( proto )
          12. 10.4.5.12 TypedArrayByteLength ( taRecord )
          13. 10.4.5.13 TypedArrayLength ( taRecord )
          14. 10.4.5.14 IsTypedArrayOutOfBounds ( taRecord )
          15. 10.4.5.15 IsTypedArrayFixedLength ( obj )
          16. 10.4.5.16 IsValidIntegerIndex ( obj, index )
          17. 10.4.5.17 TypedArrayGetElement ( obj, index )
          18. 10.4.5.18 TypedArraySetElement ( obj, index, value )
          19. 10.4.5.19 IsArrayBufferViewOutOfBounds ( obj )
        6. +10.4.6 Module Namespace Exotic Objects
          1. 10.4.6.1 [[GetPrototypeOf]] ( )
          2. 10.4.6.2 [[SetPrototypeOf]] ( proto )
          3. 10.4.6.3 [[IsExtensible]] ( )
          4. 10.4.6.4 [[PreventExtensions]] ( )
          5. 10.4.6.5 [[GetOwnProperty]] ( propertyKey )
          6. 10.4.6.6 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
          7. 10.4.6.7 [[HasProperty]] ( propertyKey )
          8. 10.4.6.8 [[Get]] ( propertyKey, receiver )
          9. 10.4.6.9 [[Set]] ( propertyKey, value, receiver )
          10. 10.4.6.10 [[Delete]] ( propertyKey )
          11. 10.4.6.11 [[OwnPropertyKeys]] ( )
          12. 10.4.6.12 ModuleNamespaceCreate ( module, exports )
        7. +10.4.7 Immutable Prototype Exotic Objects
          1. 10.4.7.1 [[SetPrototypeOf]] ( proto )
          2. 10.4.7.2 SetImmutablePrototype ( obj, proto )
      5. +10.5 Proxy Object Internal Methods and Internal Slots
        1. 10.5.1 [[GetPrototypeOf]] ( )
        2. 10.5.2 [[SetPrototypeOf]] ( proto )
        3. 10.5.3 [[IsExtensible]] ( )
        4. 10.5.4 [[PreventExtensions]] ( )
        5. 10.5.5 [[GetOwnProperty]] ( propertyKey )
        6. 10.5.6 [[DefineOwnProperty]] ( propertyKey, propertyDesc )
        7. 10.5.7 [[HasProperty]] ( propertyKey )
        8. 10.5.8 [[Get]] ( propertyKey, receiver )
        9. 10.5.9 [[Set]] ( propertyKey, value, receiver )
        10. 10.5.10 [[Delete]] ( propertyKey )
        11. 10.5.11 [[OwnPropertyKeys]] ( )
        12. 10.5.12 [[Call]] ( thisArg, argList )
        13. 10.5.13 [[Construct]] ( argList, newTarget )
        14. 10.5.14 ValidateNonRevokedProxy ( proxy )
        15. 10.5.15 ProxyCreate ( target, handler )
    12. +11 ECMAScript Language: Source Text
      1. +11.1 Source Text
        1. 11.1.1 SS: UTF16EncodeCodePoint ( codePoint )
        2. 11.1.2 SS: CodePointsToString ( text )
        3. 11.1.3 SS: UTF16SurrogatePairToCodePoint ( lead, trail )
        4. 11.1.4 SS: CodePointAt ( string, position )
        5. 11.1.5 SS: StringToCodePoints ( string )
        6. 11.1.6 SS: ParseText ( sourceText, goalSymbol )
      2. +11.2 Types of Source Code
        1. 11.2.1 Directive Prologues and the Use Strict Directive
        2. +11.2.2 Strict Mode Code
          1. 11.2.2.1 SS: IsStrict ( parseNode )
        3. 11.2.3 Non-ECMAScript Functions
    13. +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
          1. 12.7.1.1 SS: Early Errors
          2. 12.7.1.2 SS: IdentifierCodePoints
          3. 12.7.1.3 SS: IdentifierCodePoint
        2. 12.7.2 Keywords and Reserved Words
      8. 12.8 Punctuators
      9. +12.9 Literals
        1. 12.9.1 Null Literals
        2. 12.9.2 Boolean Literals
        3. +12.9.3 Numeric Literals
          1. 12.9.3.1 SS: Early Errors
          2. 12.9.3.2 SS: MV
          3. 12.9.3.3 SS: NumericValue
        4. +12.9.4 String Literals
          1. 12.9.4.1 SS: Early Errors
          2. 12.9.4.2 SS: SV
          3. 12.9.4.3 SS: MV
        5. +12.9.5 Regular Expression Literals
          1. 12.9.5.1 SS: BodyText
          2. 12.9.5.2 SS: FlagText
        6. +12.9.6 Template Literal Lexical Components
          1. 12.9.6.1 SS: TV
          2. 12.9.6.2 SS: TRV
      10. +12.10 Automatic Semicolon Insertion
        1. 12.10.1 Rules of Automatic Semicolon Insertion
        2. 12.10.2 Examples of Automatic Semicolon Insertion
        3. +12.10.3 Interesting Cases of Automatic Semicolon Insertion
          1. 12.10.3.1 Interesting Cases of Automatic Semicolon Insertion in Statement Lists
          2. +12.10.3.2 Cases of Automatic Semicolon Insertion and “[no LineTerminator here]”
            1. 12.10.3.2.1 List of Grammar Productions with Optional Operands and “[no LineTerminator here]”
    14. +13 ECMAScript Language: Expressions
      1. +13.1 Identifiers
        1. 13.1.1 SS: Early Errors
        2. 13.1.2 SS: StringValue
        3. 13.1.3 RS: Evaluation
      2. +13.2 Primary Expression
        1. +13.2.1 The this Keyword
          1. 13.2.1.1 RS: Evaluation
        2. 13.2.2 Identifier Reference
        3. +13.2.3 Literals
          1. 13.2.3.1 RS: Evaluation
        4. +13.2.4 Array Initializer
          1. 13.2.4.1 RS: ArrayAccumulation
          2. 13.2.4.2 RS: Evaluation
        5. +13.2.5 Object Initializer
          1. 13.2.5.1 SS: Early Errors
          2. 13.2.5.2 SS: IsComputedPropertyKey
          3. 13.2.5.3 SS: PropertyDefinitionNodes
          4. 13.2.5.4 SS: PropertyNameList
          5. 13.2.5.5 RS: Evaluation
          6. 13.2.5.6 RS: PropertyDefinitionEvaluation
        6. 13.2.6 Function Defining Expressions
        7. +13.2.7 Regular Expression Literals
          1. 13.2.7.1 SS: Early Errors
          2. 13.2.7.2 SS: IsValidRegularExpressionLiteral ( literal )
          3. 13.2.7.3 RS: Evaluation
        8. +13.2.8 Template Literals
          1. 13.2.8.1 SS: Early Errors
          2. 13.2.8.2 SS: TemplateStrings
          3. 13.2.8.3 SS: TemplateString ( templateToken, escapes )
          4. 13.2.8.4 GetTemplateObject ( templateLiteral )
          5. 13.2.8.5 RS: SubstitutionEvaluation
          6. 13.2.8.6 RS: Evaluation
        9. +13.2.9 The Grouping Operator
          1. 13.2.9.1 SS: Early Errors
          2. 13.2.9.2 RS: Evaluation
      3. +13.3 Left-Hand-Side Expressions
        1. +13.3.1 Static Semantics
          1. 13.3.1.1 SS: Early Errors
        2. +13.3.2 Property Accessors
          1. 13.3.2.1 RS: Evaluation
        3. 13.3.3 EvaluatePropertyAccessWithExpressionKey ( baseValue, expr, strict )
        4. 13.3.4 EvaluatePropertyAccessWithIdentifierKey ( baseValue, identifierName, strict )
        5. +13.3.5 The new Operator
          1. +13.3.5.1 RS: Evaluation
            1. 13.3.5.1.1 EvaluateNew ( constructExpr, argumentsNode )
        6. +13.3.6 Function Calls
          1. 13.3.6.1 RS: Evaluation
          2. 13.3.6.2 EvaluateCall ( func, thisValueRef, argumentListNode, tailPosition )
        7. +13.3.7 The super Keyword
          1. 13.3.7.1 RS: Evaluation
          2. 13.3.7.2 GetSuperConstructor ( )
          3. 13.3.7.3 MakeSuperPropertyReference ( actualThis, propertyKey, strict )
        8. +13.3.8 Argument Lists
          1. 13.3.8.1 RS: ArgumentListEvaluation
        9. +13.3.9 Optional Chains
          1. 13.3.9.1 RS: Evaluation
          2. 13.3.9.2 RS: ChainEvaluation
        10. +13.3.10 Import Calls
          1. 13.3.10.1 RS: Evaluation
          2. 13.3.10.2 EvaluateImportCall ( specifierExpr [ , optionsExpr ] )
          3. 13.3.10.3 ContinueDynamicImport ( promiseCapability, moduleCompletion )
        11. +13.3.11 Tagged Templates
          1. 13.3.11.1 RS: Evaluation
        12. +13.3.12 Meta Properties
          1. +13.3.12.1 RS: Evaluation
            1. 13.3.12.1.1 HostGetImportMetaProperties ( moduleRecord )
            2. 13.3.12.1.2 HostFinalizeImportMeta ( importMeta, moduleRecord )
      4. +13.4 Update Expressions
        1. 13.4.1 SS: Early Errors
        2. +13.4.2 Postfix Increment Operator
          1. 13.4.2.1 RS: Evaluation
        3. +13.4.3 Postfix Decrement Operator
          1. 13.4.3.1 RS: Evaluation
        4. +13.4.4 Prefix Increment Operator
          1. 13.4.4.1 RS: Evaluation
        5. +13.4.5 Prefix Decrement Operator
          1. 13.4.5.1 RS: Evaluation
      5. +13.5 Unary Operators
        1. +13.5.1 The delete Operator
          1. 13.5.1.1 SS: Early Errors
          2. 13.5.1.2 RS: Evaluation
        2. +13.5.2 The void Operator
          1. 13.5.2.1 RS: Evaluation
        3. +13.5.3 The typeof Operator
          1. 13.5.3.1 RS: Evaluation
        4. +13.5.4 Unary + Operator
          1. 13.5.4.1 RS: Evaluation
        5. +13.5.5 Unary - Operator
          1. 13.5.5.1 RS: Evaluation
        6. +13.5.6 Bitwise NOT Operator ( ~ )
          1. 13.5.6.1 RS: Evaluation
        7. +13.5.7 Logical NOT Operator ( ! )
          1. 13.5.7.1 RS: Evaluation
      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
        1. +13.9.1 The Left Shift Operator ( << )
          1. 13.9.1.1 RS: Evaluation
        2. +13.9.2 The Signed Right Shift Operator ( >> )
          1. 13.9.2.1 RS: Evaluation
        3. +13.9.3 The Unsigned Right Shift Operator ( >>> )
          1. 13.9.3.1 RS: Evaluation
      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
        1. 13.15.1 SS: Early Errors
        2. 13.15.2 RS: Evaluation
        3. 13.15.3 ApplyStringOrNumericBinaryOperator ( leftValue, opText, rightValue )
        4. 13.15.4 EvaluateStringOrNumericBinaryExpression ( leftOperand, opText, rightOperand )
        5. +13.15.5 Destructuring Assignment
          1. 13.15.5.1 SS: Early Errors
          2. 13.15.5.2 RS: DestructuringAssignmentEvaluation
          3. 13.15.5.3 RS: PropertyDestructuringAssignmentEvaluation
          4. 13.15.5.4 RS: RestDestructuringAssignmentEvaluation
          5. 13.15.5.5 RS: IteratorDestructuringAssignmentEvaluation
          6. 13.15.5.6 RS: KeyedDestructuringAssignmentEvaluation
      16. +13.16 Comma Operator ( , )
        1. 13.16.1 RS: Evaluation
    15. +14 ECMAScript Language: Statements and Declarations
      1. +14.1 Statement Semantics
        1. 14.1.1 RS: Evaluation
      2. +14.2 Block
        1. 14.2.1 SS: Early Errors
        2. 14.2.2 RS: Evaluation
        3. 14.2.3 BlockDeclarationInstantiation ( code, envRecord )
      3. +14.3 Declarations and the Variable Statement
        1. +14.3.1 Let, Const, Using, and Await Using Declarations
          1. 14.3.1.1 SS: Early Errors
          2. 14.3.1.2 RS: Evaluation
          3. 14.3.1.3 RS: BindingEvaluation
        2. +14.3.2 Variable Statement
          1. 14.3.2.1 RS: Evaluation
        3. +14.3.3 Destructuring Binding Patterns
          1. 14.3.3.1 RS: PropertyBindingInitialization
          2. 14.3.3.2 RS: RestBindingInitialization
          3. 14.3.3.3 RS: KeyedBindingInitialization
      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
        1. +14.7.1 Semantics
          1. 14.7.1.1 LoopContinues ( completion, labelSet )
          2. 14.7.1.2 RS: LoopEvaluation
        2. +14.7.2 The do-while Statement
          1. 14.7.2.1 SS: Early Errors
          2. 14.7.2.2 RS: DoWhileLoopEvaluation
        3. +14.7.3 The while Statement
          1. 14.7.3.1 SS: Early Errors
          2. 14.7.3.2 RS: WhileLoopEvaluation
        4. +14.7.4 The for Statement
          1. 14.7.4.1 SS: Early Errors
          2. 14.7.4.2 RS: ForLoopEvaluation
          3. 14.7.4.3 ForBodyEvaluation ( test, increment, stmt, perIterationBindings, labelSet )
          4. 14.7.4.4 CreatePerIterationEnvironment ( perIterationBindings )
        5. +14.7.5 The for-in, for-of, and for-await-of Statements
          1. 14.7.5.1 SS: Early Errors
          2. 14.7.5.2 SS: IsDestructuring
          3. 14.7.5.3 RS: ForDeclarationBindingInitialization
          4. 14.7.5.4 RS: ForDeclarationBindingInstantiation
          5. 14.7.5.5 RS: ForInOfLoopEvaluation
          6. 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind )
          7. 14.7.5.7 ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] )
          8. 14.7.5.8 RS: Evaluation
          9. 14.7.5.9 EnumerateObjectProperties ( obj )
          10. +14.7.5.10 For-In Iterator Objects
            1. 14.7.5.10.1 CreateForInIterator ( obj )
            2. +14.7.5.10.2 The %ForInIteratorPrototype% Object
              1. 14.7.5.10.2.1 %ForInIteratorPrototype%.next ( )
            3. 14.7.5.10.3 Properties of For-In Iterator Instances
      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
        1. 14.12.1 SS: Early Errors
        2. 14.12.2 RS: CaseBlockEvaluation
        3. 14.12.3 CaseClauseIsSelected ( caseClauseNode, input )
        4. 14.12.4 RS: Evaluation
      13. +14.13 Labelled Statements
        1. 14.13.1 SS: Early Errors
        2. 14.13.2 SS: IsLabelledFunction ( stmt )
        3. 14.13.3 RS: Evaluation
        4. 14.13.4 RS: LabelledEvaluation
      14. +14.14 The throw Statement
        1. 14.14.1 RS: Evaluation
      15. +14.15 The try Statement
        1. 14.15.1 SS: Early Errors
        2. 14.15.2 RS: CatchClauseEvaluation
        3. 14.15.3 RS: Evaluation
      16. +14.16 The debugger Statement
        1. 14.16.1 RS: Evaluation
    16. +15 ECMAScript Language: Functions and Classes
      1. +15.1 Parameter Lists
        1. 15.1.1 SS: Early Errors
        2. 15.1.2 SS: ContainsExpression
        3. 15.1.3 SS: IsSimpleParameterList
        4. 15.1.4 SS: HasInitializer
        5. 15.1.5 SS: ExpectedArgumentCount
      2. +15.2 Function Definitions
        1. 15.2.1 SS: Early Errors
        2. 15.2.2 SS: FunctionBodyContainsUseStrict
        3. 15.2.3 RS: EvaluateFunctionBody
        4. 15.2.4 RS: InstantiateOrdinaryFunctionDeclaration
        5. 15.2.5 RS: InstantiateOrdinaryFunctionExpression
        6. 15.2.6 RS: Evaluation
      3. +15.3 Arrow Function Definitions
        1. 15.3.1 SS: Early Errors
        2. 15.3.2 SS: ConciseBodyContainsUseStrict
        3. 15.3.3 RS: EvaluateConciseBody
        4. 15.3.4 RS: InstantiateArrowFunctionExpression
        5. 15.3.5 RS: Evaluation
      4. +15.4 Method Definitions
        1. 15.4.1 SS: Early Errors
        2. 15.4.2 SS: HasDirectSuper
        3. 15.4.3 SS: SpecialMethod
        4. 15.4.4 RS: DefineMethod
        5. 15.4.5 RS: MethodDefinitionEvaluation
      5. +15.5 Generator Function Definitions
        1. 15.5.1 SS: Early Errors
        2. 15.5.2 RS: EvaluateGeneratorBody
        3. 15.5.3 RS: InstantiateGeneratorDeclaration
        4. 15.5.4 RS: InstantiateGeneratorFunctionExpression
        5. 15.5.5 RS: Evaluation
      6. +15.6 Async Generator Function Definitions
        1. 15.6.1 SS: Early Errors
        2. 15.6.2 RS: EvaluateAsyncGeneratorBody
        3. 15.6.3 RS: InstantiateAsyncGeneratorDeclaration
        4. 15.6.4 RS: InstantiateAsyncGeneratorFunctionExpression
        5. 15.6.5 RS: Evaluation
      7. +15.7 Class Definitions
        1. 15.7.1 SS: Early Errors
        2. 15.7.2 SS: ClassElementKind
        3. 15.7.3 SS: ConstructorMethod
        4. 15.7.4 SS: IsStatic
        5. 15.7.5 SS: NonConstructorElements
        6. 15.7.6 SS: PrototypePropertyNameList
        7. 15.7.7 SS: AllPrivateIdentifiersValid
        8. 15.7.8 SS: PrivateBoundIdentifiers
        9. 15.7.9 SS: ContainsArguments
        10. 15.7.10 RS: ClassFieldDefinitionEvaluation
        11. 15.7.11 RS: ClassStaticBlockDefinitionEvaluation
        12. 15.7.12 RS: EvaluateClassStaticBlockBody
        13. 15.7.13 RS: ClassElementEvaluation
        14. 15.7.14 RS: ClassDefinitionEvaluation
        15. 15.7.15 RS: BindingClassDeclarationEvaluation
        16. 15.7.16 RS: Evaluation
      8. +15.8 Async Function Definitions
        1. 15.8.1 SS: Early Errors
        2. 15.8.2 RS: InstantiateAsyncFunctionDeclaration
        3. 15.8.3 RS: InstantiateAsyncFunctionExpression
        4. 15.8.4 RS: EvaluateAsyncFunctionBody
        5. 15.8.5 RS: Evaluation
      9. +15.9 Async Arrow Function Definitions
        1. 15.9.1 SS: Early Errors
        2. 15.9.2 SS: AsyncConciseBodyContainsUseStrict
        3. 15.9.3 RS: EvaluateAsyncConciseBody
        4. 15.9.4 RS: InstantiateAsyncArrowFunctionExpression
        5. 15.9.5 RS: Evaluation
      10. +15.10 Tail Position Calls
        1. 15.10.1 SS: IsInTailPosition ( call )
        2. 15.10.2 SS: HasCallInTailPosition
        3. 15.10.3 PrepareForTailCall ( )
    17. +16 ECMAScript Language: Scripts and Modules
      1. +16.1 Scripts
        1. 16.1.1 SS: Early Errors
        2. 16.1.2 SS: ScriptIsStrict
        3. 16.1.3 RS: Evaluation
        4. 16.1.4 Script Records
        5. 16.1.5 ParseScript ( sourceText, realm, hostDefined )
        6. 16.1.6 ScriptEvaluation ( scriptRecord )
        7. 16.1.7 GlobalDeclarationInstantiation ( script, envRecord )
      2. +16.2 Modules
        1. +16.2.1 Module Semantics
          1. 16.2.1.1 SS: Early Errors
          2. 16.2.1.2 SS: ImportedLocalNames ( importEntries )
          3. +16.2.1.3 ModuleRequest Records
            1. 16.2.1.3.1 ModuleRequestsEqual ( x, y )
          4. 16.2.1.4 SS: ModuleRequests
          5. +16.2.1.5 Abstract Module Records
            1. 16.2.1.5.1 EvaluateModuleSync ( module )
          6. +16.2.1.6 Cyclic Module Records
            1. +16.2.1.6.1 Implementation of Module Record Abstract Methods
              1. +16.2.1.6.1.1 LoadRequestedModules ( [ hostDefined ] )
                1. 16.2.1.6.1.1.1 InnerModuleLoading ( state, module )
                2. 16.2.1.6.1.1.2 ContinueModuleLoading ( state, moduleCompletion )
              2. +16.2.1.6.1.2 Link ( )
                1. 16.2.1.6.1.2.1 InnerModuleLinking ( module, stack, index )
              3. +16.2.1.6.1.3 Evaluate ( )
                1. 16.2.1.6.1.3.1 InnerModuleEvaluation ( module, stack, index )
                2. 16.2.1.6.1.3.2 ExecuteAsyncModule ( module )
                3. 16.2.1.6.1.3.3 GatherAvailableAncestors ( module, execList )
                4. 16.2.1.6.1.3.4 AsyncModuleExecutionFulfilled ( module )
                5. 16.2.1.6.1.3.5 AsyncModuleExecutionRejected ( module, error )
            2. 16.2.1.6.2 Example Cyclic Module Record Graphs
          7. +16.2.1.7 Source Text Module Records
            1. 16.2.1.7.1 ParseModule ( sourceText, realm, hostDefined )
            2. +16.2.1.7.2 Implementation of Module Record Abstract Methods
              1. 16.2.1.7.2.1 GetExportedNames ( [ exportStarSet ] )
              2. 16.2.1.7.2.2 ResolveExport ( exportName [ , resolveSet ] )
            3. +16.2.1.7.3 Implementation of Cyclic Module Record Abstract Methods
              1. 16.2.1.7.3.1 InitializeEnvironment ( )
              2. 16.2.1.7.3.2 ExecuteModule ( [ capability ] )
          8. +16.2.1.8 Synthetic Module Records
            1. 16.2.1.8.1 CreateDefaultExportSyntheticModule ( defaultExport )
            2. 16.2.1.8.2 ParseJSONModule ( source )
            3. 16.2.1.8.3 SetSyntheticModuleExport ( module, exportName, exportValue )
            4. +16.2.1.8.4 Implementation of Module Record Abstract Methods
              1. 16.2.1.8.4.1 LoadRequestedModules ( [ hostDefined ] )
              2. 16.2.1.8.4.2 GetExportedNames ( [ exportStarSet ] )
              3. 16.2.1.8.4.3 ResolveExport ( exportName [ , resolveSet ] )
              4. 16.2.1.8.4.4 Link ( )
              5. 16.2.1.8.4.5 Evaluate ( )
          9. 16.2.1.9 GetImportedModule ( referrer, request )
          10. 16.2.1.10 HostLoadImportedModule ( referrer, moduleRequest, hostDefined, payload )
          11. 16.2.1.11 FinishLoadingImportedModule ( referrer, moduleRequest, payload, result )
          12. +16.2.1.12 AllImportAttributesSupported ( attrs )
            1. 16.2.1.12.1 HostGetSupportedImportAttributes ( )
          13. 16.2.1.13 GetModuleNamespace ( module )
          14. 16.2.1.14 RS: Evaluation
        2. +16.2.2 Imports
          1. 16.2.2.1 SS: Early Errors
          2. 16.2.2.2 SS: ImportEntries
          3. 16.2.2.3 SS: ImportEntriesForModule
          4. 16.2.2.4 SS: WithClauseToAttributes
        3. +16.2.3 Exports
          1. 16.2.3.1 SS: Early Errors
          2. 16.2.3.2 SS: ExportedBindings
          3. 16.2.3.3 SS: ExportedNames
          4. 16.2.3.4 SS: ExportEntries
          5. 16.2.3.5 SS: ExportEntriesForModule
          6. 16.2.3.6 SS: ReferencedBindings
          7. 16.2.3.7 RS: Evaluation
    18. +17 Error Handling and Language Extensions
      1. 17.1 Forbidden Extensions
    19. 18 ECMAScript Standard Built-in Objects
    20. +19 The Global Object
      1. +19.1 Value Properties of the Global Object
        1. 19.1.1 globalThis
        2. 19.1.2 Infinity
        3. 19.1.3 NaN
        4. 19.1.4 undefined
      2. +19.2 Function Properties of the Global Object
        1. +19.2.1 eval ( source )
          1. 19.2.1.1 PerformEval ( source, strictCaller, direct )
          2. 19.2.1.2 HostEnsureCanCompileStrings ( calleeRealm, paramStrings, bodyString, codeString, compilationType, paramArgs, bodyArg )
          3. 19.2.1.3 HostGetCodeForEval ( arg )
          4. 19.2.1.4 EvalDeclarationInstantiation ( body, variableEnv, lexicalEnv, privateEnv, strict )
        2. 19.2.2 isFinite ( value )
        3. 19.2.3 isNaN ( value )
        4. 19.2.4 parseFloat ( string )
        5. 19.2.5 parseInt ( string, radix )
        6. +19.2.6 URI Handling Functions
          1. 19.2.6.1 decodeURI ( encodedURI )
          2. 19.2.6.2 decodeURIComponent ( encodedURIComponent )
          3. 19.2.6.3 encodeURI ( uri )
          4. 19.2.6.4 encodeURIComponent ( uriComponent )
          5. 19.2.6.5 Encode ( string, extraUnescaped )
          6. 19.2.6.6 Decode ( string, preserveEscapeSet )
          7. 19.2.6.7 ParseHexOctet ( string, position )
      3. +19.3 Constructor Properties of the Global Object
        1. 19.3.1 AggregateError ( . . . )
        2. 19.3.2 Array ( . . . )
        3. 19.3.3 ArrayBuffer ( . . . )
        4. 19.3.4 AsyncDisposableStack ( . . . )
        5. 19.3.5 BigInt ( . . . )
        6. 19.3.6 BigInt64Array ( . . . )
        7. 19.3.7 BigUint64Array ( . . . )
        8. 19.3.8 Boolean ( . . . )
        9. 19.3.9 DataView ( . . . )
        10. 19.3.10 Date ( . . . )
        11. 19.3.11 DisposableStack ( . . . )
        12. 19.3.12 Error ( . . . )
        13. 19.3.13 EvalError ( . . . )
        14. 19.3.14 FinalizationRegistry ( . . . )
        15. 19.3.15 Float16Array ( . . . )
        16. 19.3.16 Float32Array ( . . . )
        17. 19.3.17 Float64Array ( . . . )
        18. 19.3.18 Function ( . . . )
        19. 19.3.19 Int8Array ( . . . )
        20. 19.3.20 Int16Array ( . . . )
        21. 19.3.21 Int32Array ( . . . )
        22. 19.3.22 Iterator ( . . . )
        23. 19.3.23 Map ( . . . )
        24. 19.3.24 Number ( . . . )
        25. 19.3.25 Object ( . . . )
        26. 19.3.26 Promise ( . . . )
        27. 19.3.27 Proxy ( . . . )
        28. 19.3.28 RangeError ( . . . )
        29. 19.3.29 ReferenceError ( . . . )
        30. 19.3.30 RegExp ( . . . )
        31. 19.3.31 Set ( . . . )
        32. 19.3.32 SharedArrayBuffer ( . . . )
        33. 19.3.33 String ( . . . )
        34. 19.3.34 SuppressedError ( . . . )
        35. 19.3.35 Symbol ( . . . )
        36. 19.3.36 SyntaxError ( . . . )
        37. 19.3.37 TypeError ( . . . )
        38. 19.3.38 Uint8Array ( . . . )
        39. 19.3.39 Uint8ClampedArray ( . . . )
        40. 19.3.40 Uint16Array ( . . . )
        41. 19.3.41 Uint32Array ( . . . )
        42. 19.3.42 URIError ( . . . )
        43. 19.3.43 WeakMap ( . . . )
        44. 19.3.44 WeakRef ( . . . )
        45. 19.3.45 WeakSet ( . . . )
      4. +19.4 Other Properties of the Global Object
        1. 19.4.1 Atomics
        2. 19.4.2 JSON
        3. 19.4.3 Math
        4. 19.4.4 Reflect
    21. +20 Fundamental Objects
      1. +20.1 Object Objects
        1. +20.1.1 The Object Constructor
          1. 20.1.1.1 Object ( value )
        2. +20.1.2 Properties of the Object Constructor
          1. 20.1.2.1 Object.assign ( target, ...sources )
          2. 20.1.2.2 Object.create ( proto, properties )
          3. +20.1.2.3 Object.defineProperties ( obj, properties )
            1. 20.1.2.3.1 ObjectDefineProperties ( obj, properties )
          4. 20.1.2.4 Object.defineProperty ( obj, key, attrs )
          5. 20.1.2.5 Object.entries ( obj )
          6. 20.1.2.6 Object.freeze ( obj )
          7. 20.1.2.7 Object.fromEntries ( iterable )
          8. 20.1.2.8 Object.getOwnPropertyDescriptor ( obj, key )
          9. 20.1.2.9 Object.getOwnPropertyDescriptors ( obj )
          10. 20.1.2.10 Object.getOwnPropertyNames ( obj )
          11. +20.1.2.11 Object.getOwnPropertySymbols ( obj )
            1. 20.1.2.11.1 GetOwnPropertyKeys ( value, type )
          12. 20.1.2.12 Object.getPrototypeOf ( obj )
          13. 20.1.2.13 Object.groupBy ( items, callback )
          14. 20.1.2.14 Object.hasOwn ( obj, key )
          15. 20.1.2.15 Object.is ( value1, value2 )
          16. 20.1.2.16 Object.isExtensible ( obj )
          17. 20.1.2.17 Object.isFrozen ( obj )
          18. 20.1.2.18 Object.isSealed ( obj )
          19. 20.1.2.19 Object.keys ( obj )
          20. 20.1.2.20 Object.preventExtensions ( obj )
          21. 20.1.2.21 Object.prototype
          22. 20.1.2.22 Object.seal ( obj )
          23. 20.1.2.23 Object.setPrototypeOf ( obj, proto )
          24. 20.1.2.24 Object.values ( obj )
        3. +20.1.3 Properties of the Object Prototype Object
          1. 20.1.3.1 Object.prototype.constructor
          2. 20.1.3.2 Object.prototype.hasOwnProperty ( value )
          3. 20.1.3.3 Object.prototype.isPrototypeOf ( value )
          4. 20.1.3.4 Object.prototype.propertyIsEnumerable ( value )
          5. 20.1.3.5 Object.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
          6. 20.1.3.6 Object.prototype.toString ( )
          7. 20.1.3.7 Object.prototype.valueOf ( )
          8. +20.1.3.8 Object.prototype.__proto__
            1. 20.1.3.8.1 get Object.prototype.__proto__
            2. 20.1.3.8.2 set Object.prototype.__proto__
          9. +20.1.3.9 Legacy Object.prototype Accessor Methods
            1. 20.1.3.9.1 Object.prototype.__defineGetter__ ( key, getter )
            2. 20.1.3.9.2 Object.prototype.__defineSetter__ ( key, setter )
            3. 20.1.3.9.3 Object.prototype.__lookupGetter__ ( key )
            4. 20.1.3.9.4 Object.prototype.__lookupSetter__ ( key )
        4. 20.1.4 Properties of Object Instances
      2. +20.2 Function Objects
        1. +20.2.1 The Function Constructor
          1. +20.2.1.1 Function ( ...paramArgs, bodyArg )
            1. 20.2.1.1.1 CreateDynamicFunction ( ctor, newTarget, kind, paramArgs, bodyArg )
        2. +20.2.2 Properties of the Function Constructor
          1. 20.2.2.1 Function.prototype
        3. +20.2.3 Properties of the Function Prototype Object
          1. 20.2.3.1 Function.prototype.apply ( thisArg, argArray )
          2. 20.2.3.2 Function.prototype.bind ( thisArg, ...args )
          3. 20.2.3.3 Function.prototype.call ( thisArg, ...args )
          4. 20.2.3.4 Function.prototype.constructor
          5. 20.2.3.5 Function.prototype.toString ( )
          6. 20.2.3.6 Function.prototype [ %Symbol.hasInstance% ] ( value )
        4. +20.2.4 Function Instances
          1. 20.2.4.1 length
          2. 20.2.4.2 name
          3. 20.2.4.3 prototype
        5. 20.2.5 HostHasSourceTextAvailable ( func )
      3. +20.3 Boolean Objects
        1. +20.3.1 The Boolean Constructor
          1. 20.3.1.1 Boolean ( value )
        2. +20.3.2 Properties of the Boolean Constructor
          1. 20.3.2.1 Boolean.prototype
        3. +20.3.3 Properties of the Boolean Prototype Object
          1. 20.3.3.1 Boolean.prototype.constructor
          2. 20.3.3.2 Boolean.prototype.toString ( )
          3. +20.3.3.3 Boolean.prototype.valueOf ( )
            1. 20.3.3.3.1 ThisBooleanValue ( arg )
        4. 20.3.4 Properties of Boolean Instances
      4. +20.4 Symbol Objects
        1. +20.4.1 The Symbol Constructor
          1. 20.4.1.1 Symbol ( [ description ] )
        2. +20.4.2 Properties of the Symbol Constructor
          1. 20.4.2.1 Symbol.asyncDispose
          2. 20.4.2.2 Symbol.asyncIterator
          3. 20.4.2.3 Symbol.dispose
          4. 20.4.2.4 Symbol.for ( key )
          5. 20.4.2.5 Symbol.hasInstance
          6. 20.4.2.6 Symbol.isConcatSpreadable
          7. 20.4.2.7 Symbol.iterator
          8. 20.4.2.8 Symbol.keyFor ( symbol )
          9. 20.4.2.9 Symbol.match
          10. 20.4.2.10 Symbol.matchAll
          11. 20.4.2.11 Symbol.prototype
          12. 20.4.2.12 Symbol.replace
          13. 20.4.2.13 Symbol.search
          14. 20.4.2.14 Symbol.species
          15. 20.4.2.15 Symbol.split
          16. 20.4.2.16 Symbol.toPrimitive
          17. 20.4.2.17 Symbol.toStringTag
          18. 20.4.2.18 Symbol.unscopables
        3. +20.4.3 Properties of the Symbol Prototype Object
          1. 20.4.3.1 Symbol.prototype.constructor
          2. 20.4.3.2 get Symbol.prototype.description
          3. +20.4.3.3 Symbol.prototype.toString ( )
            1. 20.4.3.3.1 SymbolDescriptiveString ( symbol )
          4. +20.4.3.4 Symbol.prototype.valueOf ( )
            1. 20.4.3.4.1 ThisSymbolValue ( arg )
          5. 20.4.3.5 Symbol.prototype [ %Symbol.toPrimitive% ] ( hint )
          6. 20.4.3.6 Symbol.prototype [ %Symbol.toStringTag% ]
        4. 20.4.4 Properties of Symbol Instances
        5. +20.4.5 Abstract Operations for Symbols
          1. 20.4.5.1 GlobalSymbolRegistry Records
          2. 20.4.5.2 KeyForSymbol ( symbol )
      5. +20.5 Error Objects
        1. +20.5.1 The Error Constructor
          1. 20.5.1.1 Error ( message [ , options ] )
        2. +20.5.2 Properties of the Error Constructor
          1. 20.5.2.1 Error.isError ( arg )
          2. 20.5.2.2 Error.prototype
        3. +20.5.3 Properties of the Error Prototype Object
          1. 20.5.3.1 Error.prototype.constructor
          2. 20.5.3.2 Error.prototype.message
          3. 20.5.3.3 Error.prototype.name
          4. 20.5.3.4 Error.prototype.toString ( )
        4. 20.5.4 Properties of Error Instances
        5. +20.5.5 Native Error Types Used in This Standard
          1. 20.5.5.1 EvalError
          2. 20.5.5.2 RangeError
          3. 20.5.5.3 ReferenceError
          4. 20.5.5.4 SyntaxError
          5. 20.5.5.5 TypeError
          6. 20.5.5.6 URIError
        6. +20.5.6 NativeError Object Structure
          1. +20.5.6.1 The NativeError Constructors
            1. 20.5.6.1.1 NativeError ( message [ , options ] )
          2. +20.5.6.2 Properties of the NativeError Constructors
            1. 20.5.6.2.1 NativeError.prototype
          3. +20.5.6.3 Properties of the NativeError Prototype Objects
            1. 20.5.6.3.1 NativeError.prototype.constructor
            2. 20.5.6.3.2 NativeError.prototype.message
            3. 20.5.6.3.3 NativeError.prototype.name
          4. 20.5.6.4 Properties of NativeError Instances
        7. +20.5.7 AggregateError Objects
          1. +20.5.7.1 The AggregateError Constructor
            1. 20.5.7.1.1 AggregateError ( errors, message [ , options ] )
          2. +20.5.7.2 Properties of the AggregateError Constructor
            1. 20.5.7.2.1 AggregateError.prototype
          3. +20.5.7.3 Properties of the AggregateError Prototype Object
            1. 20.5.7.3.1 AggregateError.prototype.constructor
            2. 20.5.7.3.2 AggregateError.prototype.message
            3. 20.5.7.3.3 AggregateError.prototype.name
          4. 20.5.7.4 Properties of AggregateError Instances
        8. +20.5.8 SuppressedError Objects
          1. +20.5.8.1 The SuppressedError Constructor
            1. 20.5.8.1.1 SuppressedError ( error, suppressed, message )
          2. +20.5.8.2 Properties of the SuppressedError Constructor
            1. 20.5.8.2.1 SuppressedError.prototype
          3. +20.5.8.3 Properties of the SuppressedError Prototype Object
            1. 20.5.8.3.1 SuppressedError.prototype.constructor
            2. 20.5.8.3.2 SuppressedError.prototype.message
            3. 20.5.8.3.3 SuppressedError.prototype.name
          4. 20.5.8.4 Properties of SuppressedError Instances
        9. +20.5.9 Abstract Operations for Error Objects
          1. 20.5.9.1 InstallErrorCause ( obj, options )
    22. +21 Numbers and Dates
      1. +21.1 Number Objects
        1. +21.1.1 The Number Constructor
          1. 21.1.1.1 Number ( value )
        2. +21.1.2 Properties of the Number Constructor
          1. 21.1.2.1 Number.EPSILON
          2. 21.1.2.2 Number.isFinite ( number )
          3. 21.1.2.3 Number.isInteger ( number )
          4. 21.1.2.4 Number.isNaN ( number )
          5. 21.1.2.5 Number.isSafeInteger ( number )
          6. 21.1.2.6 Number.MAX_SAFE_INTEGER
          7. 21.1.2.7 Number.MAX_VALUE
          8. 21.1.2.8 Number.MIN_SAFE_INTEGER
          9. 21.1.2.9 Number.MIN_VALUE
          10. 21.1.2.10 Number.NaN
          11. 21.1.2.11 Number.NEGATIVE_INFINITY
          12. 21.1.2.12 Number.parseFloat ( string )
          13. 21.1.2.13 Number.parseInt ( string, radix )
          14. 21.1.2.14 Number.POSITIVE_INFINITY
          15. 21.1.2.15 Number.prototype
        3. +21.1.3 Properties of the Number Prototype Object
          1. 21.1.3.1 Number.prototype.constructor
          2. 21.1.3.2 Number.prototype.toExponential ( fractionDigits )
          3. 21.1.3.3 Number.prototype.toFixed ( fractionDigits )
          4. 21.1.3.4 Number.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
          5. 21.1.3.5 Number.prototype.toPrecision ( precision )
          6. 21.1.3.6 Number.prototype.toString ( [ radix ] )
          7. +21.1.3.7 Number.prototype.valueOf ( )
            1. 21.1.3.7.1 ThisNumberValue ( arg )
        4. 21.1.4 Properties of Number Instances
      2. +21.2 BigInt Objects
        1. +21.2.1 The BigInt Constructor
          1. +21.2.1.1 BigInt ( value )
            1. 21.2.1.1.1 NumberToBigInt ( number )
        2. +21.2.2 Properties of the BigInt Constructor
          1. 21.2.2.1 BigInt.asIntN ( bits, bigint )
          2. 21.2.2.2 BigInt.asUintN ( bits, bigint )
          3. 21.2.2.3 BigInt.prototype
        3. +21.2.3 Properties of the BigInt Prototype Object
          1. 21.2.3.1 BigInt.prototype.constructor
          2. 21.2.3.2 BigInt.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
          3. 21.2.3.3 BigInt.prototype.toString ( [ radix ] )
          4. +21.2.3.4 BigInt.prototype.valueOf ( )
            1. 21.2.3.4.1 ThisBigIntValue ( arg )
          5. 21.2.3.5 BigInt.prototype [ %Symbol.toStringTag% ]
        4. 21.2.4 Properties of BigInt Instances
      3. +21.3 The Math Object
        1. +21.3.1 Value Properties of the Math Object
          1. 21.3.1.1 Math.E
          2. 21.3.1.2 Math.LN10
          3. 21.3.1.3 Math.LN2
          4. 21.3.1.4 Math.LOG10E
          5. 21.3.1.5 Math.LOG2E
          6. 21.3.1.6 Math.PI
          7. 21.3.1.7 Math.SQRT1_2
          8. 21.3.1.8 Math.SQRT2
          9. 21.3.1.9 Math [ %Symbol.toStringTag% ]
        2. +21.3.2 Function Properties of the Math Object
          1. 21.3.2.1 Math.abs ( x )
          2. 21.3.2.2 Math.acos ( x )
          3. 21.3.2.3 Math.acosh ( x )
          4. 21.3.2.4 Math.asin ( x )
          5. 21.3.2.5 Math.asinh ( x )
          6. 21.3.2.6 Math.atan ( x )
          7. 21.3.2.7 Math.atanh ( x )
          8. 21.3.2.8 Math.atan2 ( y, x )
          9. 21.3.2.9 Math.cbrt ( x )
          10. 21.3.2.10 Math.ceil ( x )
          11. 21.3.2.11 Math.clz32 ( x )
          12. 21.3.2.12 Math.cos ( x )
          13. 21.3.2.13 Math.cosh ( x )
          14. 21.3.2.14 Math.exp ( x )
          15. 21.3.2.15 Math.expm1 ( x )
          16. 21.3.2.16 Math.floor ( x )
          17. 21.3.2.17 Math.fround ( x )
          18. 21.3.2.18 Math.f16round ( x )
          19. 21.3.2.19 Math.hypot ( ...args )
          20. 21.3.2.20 Math.imul ( x, y )
          21. 21.3.2.21 Math.log ( x )
          22. 21.3.2.22 Math.log1p ( x )
          23. 21.3.2.23 Math.log10 ( x )
          24. 21.3.2.24 Math.log2 ( x )
          25. 21.3.2.25 Math.max ( ...args )
          26. 21.3.2.26 Math.min ( ...args )
          27. 21.3.2.27 Math.pow ( base, exponent )
          28. 21.3.2.28 Math.random ( )
          29. 21.3.2.29 Math.round ( x )
          30. 21.3.2.30 Math.sign ( x )
          31. 21.3.2.31 Math.sin ( x )
          32. 21.3.2.32 Math.sinh ( x )
          33. 21.3.2.33 Math.sqrt ( x )
          34. 21.3.2.34 Math.sumPrecise ( items )
          35. 21.3.2.35 Math.tan ( x )
          36. 21.3.2.36 Math.tanh ( x )
          37. 21.3.2.37 Math.trunc ( x )
      4. +21.4 Date Objects
        1. +21.4.1 Overview of Date Objects and Definitions of Abstract Operations
          1. 21.4.1.1 Time Values and Time Range
          2. 21.4.1.2 Time-related Constants
          3. 21.4.1.3 Day ( tv )
          4. 21.4.1.4 TimeWithinDay ( tv )
          5. 21.4.1.5 DayFromYear ( y )
          6. 21.4.1.6 TimeFromYear ( y )
          7. 21.4.1.7 YearFromTime ( tv )
          8. 21.4.1.8 DayWithinYear ( tv )
          9. 21.4.1.9 IsLeapYear ( y )
          10. 21.4.1.10 MonthFromTime ( tv )
          11. 21.4.1.11 DateFromTime ( tv )
          12. 21.4.1.12 WeekDay ( tv )
          13. 21.4.1.13 HourFromTime ( tv )
          14. 21.4.1.14 MinuteFromTime ( tv )
          15. 21.4.1.15 SecondFromTime ( tv )
          16. 21.4.1.16 MillisecondFromTime ( tv )
          17. 21.4.1.17 Epoch Nanoseconds and Range
          18. 21.4.1.18 GetUTCEpochNanoseconds ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond )
          19. 21.4.1.19 Time Zone Identifiers
          20. 21.4.1.20 GetNamedTimeZoneEpochNanoseconds ( timeZoneIdentifier, year, month, day, hour, minute, second, millisecond, microsecond, nanosecond )
          21. 21.4.1.21 GetNamedTimeZoneOffsetNanoseconds ( timeZoneIdentifier, epochNanoseconds )
          22. 21.4.1.22 Time Zone Identifier Record
          23. 21.4.1.23 AvailableNamedTimeZoneIdentifiers ( )
          24. 21.4.1.24 SystemTimeZoneIdentifier ( )
          25. 21.4.1.25 LocalTime ( tv )
          26. 21.4.1.26 UTC ( t )
          27. 21.4.1.27 MakeTime ( hour, minute, second, millisecond )
          28. 21.4.1.28 MakeDay ( year, month, day )
          29. 21.4.1.29 MakeDate ( day, time )
          30. 21.4.1.30 MakeFullYear ( year )
          31. 21.4.1.31 TimeClip ( time )
          32. +21.4.1.32 Date Time String Format
            1. 21.4.1.32.1 Expanded Years
          33. +21.4.1.33 Time Zone Offset String Format
            1. 21.4.1.33.1 IsTimeZoneOffsetString ( offsetString )
            2. 21.4.1.33.2 ParseTimeZoneOffsetString ( offsetString )
        2. +21.4.2 The Date Constructor
          1. 21.4.2.1 Date ( ...values )
        3. +21.4.3 Properties of the Date Constructor
          1. 21.4.3.1 Date.now ( )
          2. 21.4.3.2 Date.parse ( string )
          3. 21.4.3.3 Date.prototype
          4. 21.4.3.4 Date.UTC ( year [ , month [ , day [ , hour [ , minute [ , second [ , millisecond ] ] ] ] ] ] )
        4. +21.4.4 Properties of the Date Prototype Object
          1. 21.4.4.1 Date.prototype.constructor
          2. 21.4.4.2 Date.prototype.getDate ( )
          3. 21.4.4.3 Date.prototype.getDay ( )
          4. 21.4.4.4 Date.prototype.getFullYear ( )
          5. 21.4.4.5 Date.prototype.getHours ( )
          6. 21.4.4.6 Date.prototype.getMilliseconds ( )
          7. 21.4.4.7 Date.prototype.getMinutes ( )
          8. 21.4.4.8 Date.prototype.getMonth ( )
          9. 21.4.4.9 Date.prototype.getSeconds ( )
          10. 21.4.4.10 Date.prototype.getTime ( )
          11. 21.4.4.11 Date.prototype.getTimezoneOffset ( )
          12. 21.4.4.12 Date.prototype.getUTCDate ( )
          13. 21.4.4.13 Date.prototype.getUTCDay ( )
          14. 21.4.4.14 Date.prototype.getUTCFullYear ( )
          15. 21.4.4.15 Date.prototype.getUTCHours ( )
          16. 21.4.4.16 Date.prototype.getUTCMilliseconds ( )
          17. 21.4.4.17 Date.prototype.getUTCMinutes ( )
          18. 21.4.4.18 Date.prototype.getUTCMonth ( )
          19. 21.4.4.19 Date.prototype.getUTCSeconds ( )
          20. 21.4.4.20 Date.prototype.setDate ( day )
          21. 21.4.4.21 Date.prototype.setFullYear ( year [ , month [ , day ] ] )
          22. 21.4.4.22 Date.prototype.setHours ( hour [ , minute [ , second [ , millisecond ] ] ] )
          23. 21.4.4.23 Date.prototype.setMilliseconds ( millisecond )
          24. 21.4.4.24 Date.prototype.setMinutes ( minute [ , second [ , millisecond ] ] )
          25. 21.4.4.25 Date.prototype.setMonth ( month [ , day ] )
          26. 21.4.4.26 Date.prototype.setSeconds ( second [ , millisecond ] )
          27. 21.4.4.27 Date.prototype.setTime ( time )
          28. 21.4.4.28 Date.prototype.setUTCDate ( day )
          29. 21.4.4.29 Date.prototype.setUTCFullYear ( year [ , month [ , day ] ] )
          30. 21.4.4.30 Date.prototype.setUTCHours ( hour [ , minute [ , second [ , millisecond ] ] ] )
          31. 21.4.4.31 Date.prototype.setUTCMilliseconds ( millisecond )
          32. 21.4.4.32 Date.prototype.setUTCMinutes ( minute [ , second [ , millisecond ] ] )
          33. 21.4.4.33 Date.prototype.setUTCMonth ( month [ , day ] )
          34. 21.4.4.34 Date.prototype.setUTCSeconds ( second [ , millisecond ] )
          35. 21.4.4.35 Date.prototype.toDateString ( )
          36. 21.4.4.36 Date.prototype.toISOString ( )
          37. 21.4.4.37 Date.prototype.toJSON ( key )
          38. 21.4.4.38 Date.prototype.toLocaleDateString ( [ reserved1 [ , reserved2 ] ] )
          39. 21.4.4.39 Date.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
          40. 21.4.4.40 Date.prototype.toLocaleTimeString ( [ reserved1 [ , reserved2 ] ] )
          41. +21.4.4.41 Date.prototype.toString ( )
            1. 21.4.4.41.1 TimeString ( tv )
            2. 21.4.4.41.2 DateString ( tv )
            3. 21.4.4.41.3 TimeZoneString ( tv )
            4. 21.4.4.41.4 ToDateString ( tv )
          42. 21.4.4.42 Date.prototype.toTimeString ( )
          43. 21.4.4.43 Date.prototype.toUTCString ( )
          44. 21.4.4.44 Date.prototype.valueOf ( )
          45. 21.4.4.45 Date.prototype [ %Symbol.toPrimitive% ] ( hint )
        5. 21.4.5 Properties of Date Instances
    23. +22 Text Processing
      1. +22.1 String Objects
        1. +22.1.1 The String Constructor
          1. 22.1.1.1 String ( value )
        2. +22.1.2 Properties of the String Constructor
          1. 22.1.2.1 String.fromCharCode ( ...codeUnits )
          2. 22.1.2.2 String.fromCodePoint ( ...codePoints )
          3. 22.1.2.3 String.prototype
          4. 22.1.2.4 String.raw ( template, ...substitutions )
        3. +22.1.3 Properties of the String Prototype Object
          1. 22.1.3.1 String.prototype.at ( index )
          2. 22.1.3.2 String.prototype.charAt ( position )
          3. 22.1.3.3 String.prototype.charCodeAt ( position )
          4. 22.1.3.4 String.prototype.codePointAt ( position )
          5. 22.1.3.5 String.prototype.concat ( ...args )
          6. 22.1.3.6 String.prototype.constructor
          7. 22.1.3.7 String.prototype.endsWith ( searchString [ , endPosition ] )
          8. 22.1.3.8 String.prototype.includes ( searchString [ , position ] )
          9. 22.1.3.9 String.prototype.indexOf ( searchString [ , position ] )
          10. 22.1.3.10 String.prototype.isWellFormed ( )
          11. 22.1.3.11 String.prototype.lastIndexOf ( searchString [ , position ] )
          12. 22.1.3.12 String.prototype.localeCompare ( that [ , reserved1 [ , reserved2 ] ] )
          13. 22.1.3.13 String.prototype.match ( regexpOrPattern )
          14. 22.1.3.14 String.prototype.matchAll ( regexpOrPattern )
          15. 22.1.3.15 String.prototype.normalize ( [ form ] )
          16. 22.1.3.16 String.prototype.padEnd ( maxLength [ , fillString ] )
          17. +22.1.3.17 String.prototype.padStart ( maxLength [ , fillString ] )
            1. 22.1.3.17.1 StringPaddingBuiltinsImpl ( thisValue, maxLength, fillString, placement )
            2. 22.1.3.17.2 StringPad ( string, maxLength, fillString, placement )
            3. 22.1.3.17.3 ToZeroPaddedDecimalString ( n, minLength )
          18. 22.1.3.18 String.prototype.repeat ( count )
          19. +22.1.3.19 String.prototype.replace ( searchValue, replaceValue )
            1. 22.1.3.19.1 GetSubstitution ( matched, string, position, captures, namedCaptures, replacementTemplate )
          20. 22.1.3.20 String.prototype.replaceAll ( searchValue, replaceValue )
          21. 22.1.3.21 String.prototype.search ( regexpOrPattern )
          22. 22.1.3.22 String.prototype.slice ( start, end )
          23. 22.1.3.23 String.prototype.split ( separator, substringLimit )
          24. 22.1.3.24 String.prototype.startsWith ( searchString [ , position ] )
          25. 22.1.3.25 String.prototype.substring ( start, end )
          26. 22.1.3.26 String.prototype.toLocaleLowerCase ( [ reserved1 [ , reserved2 ] ] )
          27. 22.1.3.27 String.prototype.toLocaleUpperCase ( [ reserved1 [ , reserved2 ] ] )
          28. 22.1.3.28 String.prototype.toLowerCase ( )
          29. 22.1.3.29 String.prototype.toString ( )
          30. 22.1.3.30 String.prototype.toUpperCase ( )
          31. 22.1.3.31 String.prototype.toWellFormed ( )
          32. +22.1.3.32 String.prototype.trim ( )
            1. 22.1.3.32.1 TrimString ( arg, where )
          33. 22.1.3.33 String.prototype.trimEnd ( )
          34. 22.1.3.34 String.prototype.trimStart ( )
          35. +22.1.3.35 String.prototype.valueOf ( )
            1. 22.1.3.35.1 ThisStringValue ( arg )
          36. 22.1.3.36 String.prototype [ %Symbol.iterator% ] ( )
        4. +22.1.4 Properties of String Instances
          1. 22.1.4.1 length
        5. +22.1.5 String Iterator Objects
          1. +22.1.5.1 The %StringIteratorPrototype% Object
            1. 22.1.5.1.1 %StringIteratorPrototype%.next ( )
            2. 22.1.5.1.2 %StringIteratorPrototype% [ %Symbol.toStringTag% ]
      2. +22.2 RegExp (Regular Expression) Objects
        1. +22.2.1 Patterns
          1. 22.2.1.1 SS: Early Errors
          2. 22.2.1.2 SS: CountLeftCapturingParensWithin ( parseNode )
          3. 22.2.1.3 SS: CountLeftCapturingParensBefore ( parseNode )
          4. 22.2.1.4 SS: MightBothParticipate ( x, y )
          5. 22.2.1.5 SS: CapturingGroupNumber
          6. 22.2.1.6 SS: IsCharacterClass
          7. 22.2.1.7 SS: CharacterValue
          8. 22.2.1.8 SS: MayContainStrings
          9. 22.2.1.9 SS: GroupSpecifiersThatMatch ( thisGroupName )
          10. 22.2.1.10 SS: CapturingGroupName
          11. 22.2.1.11 SS: RegExpIdentifierCodePoints
          12. 22.2.1.12 SS: RegExpIdentifierCodePoint
        2. +22.2.2 Pattern Semantics
          1. +22.2.2.1 Notation
            1. 22.2.2.1.1 RegExp Records
          2. 22.2.2.2 RS: CompilePattern
          3. +22.2.2.3 RS: CompileSubpattern
            1. 22.2.2.3.1 RepeatMatcher ( m, min, max, greedy, matchState, continue, parenIndex, parenCount )
            2. 22.2.2.3.2 EmptyMatcher ( )
            3. 22.2.2.3.3 MatchTwoAlternatives ( m1, m2 )
            4. 22.2.2.3.4 MatchSequence ( m1, m2, direction )
          4. +22.2.2.4 RS: CompileAssertion
            1. 22.2.2.4.1 IsWordChar ( regexpRecord, input, e )
          5. 22.2.2.5 RS: CompileQuantifier
          6. 22.2.2.6 RS: CompileQuantifierPrefix
          7. +22.2.2.7 RS: CompileAtom
            1. 22.2.2.7.1 CharacterSetMatcher ( regexpRecord, charSet, invert, direction )
            2. 22.2.2.7.2 BackreferenceMatcher ( regexpRecord, ns, direction )
            3. 22.2.2.7.3 Canonicalize ( regexpRecord, char )
            4. 22.2.2.7.4 UpdateModifiers ( regexpRecord, add, remove )
          8. 22.2.2.8 RS: CompileCharacterClass
          9. +22.2.2.9 RS: CompileToCharSet
            1. 22.2.2.9.1 CharacterRange ( charSet, otherSet )
            2. 22.2.2.9.2 HasEitherUnicodeFlag ( regexpRecord )
            3. 22.2.2.9.3 WordCharacters ( regexpRecord )
            4. 22.2.2.9.4 AllCharacters ( regexpRecord )
            5. 22.2.2.9.5 MaybeSimpleCaseFolding ( regexpRecord, charSet )
            6. 22.2.2.9.6 CharacterComplement ( regexpRecord, complement )
            7. 22.2.2.9.7 UnicodeMatchProperty ( regexpRecord, p )
            8. 22.2.2.9.8 UnicodeMatchPropertyValue ( p, v )
          10. 22.2.2.10 RS: CompileClassSetString
        3. +22.2.3 Abstract Operations for RegExp Creation
          1. 22.2.3.1 RegExpCreate ( pattern, flags )
          2. 22.2.3.2 RegExpAlloc ( newTarget )
          3. 22.2.3.3 RegExpInitialize ( obj, pattern, flags )
          4. 22.2.3.4 SS: ParsePattern ( patternText, u, v )
        4. +22.2.4 The RegExp Constructor
          1. 22.2.4.1 RegExp ( patternOrRegexp, flags )
        5. +22.2.5 Properties of the RegExp Constructor
          1. +22.2.5.1 RegExp.escape ( string )
            1. 22.2.5.1.1 EncodeForRegExpEscape ( codePoint )
          2. 22.2.5.2 RegExp.prototype
          3. 22.2.5.3 get RegExp [ %Symbol.species% ]
        6. +22.2.6 Properties of the RegExp Prototype Object
          1. 22.2.6.1 RegExp.prototype.constructor
          2. 22.2.6.2 RegExp.prototype.exec ( string )
          3. 22.2.6.3 get RegExp.prototype.dotAll
          4. +22.2.6.4 get RegExp.prototype.flags
            1. 22.2.6.4.1 RegExpHasFlag ( regexp, codeUnit )
          5. 22.2.6.5 get RegExp.prototype.global
          6. 22.2.6.6 get RegExp.prototype.hasIndices
          7. 22.2.6.7 get RegExp.prototype.ignoreCase
          8. 22.2.6.8 RegExp.prototype [ %Symbol.match% ] ( string )
          9. 22.2.6.9 RegExp.prototype [ %Symbol.matchAll% ] ( string )
          10. 22.2.6.10 get RegExp.prototype.multiline
          11. 22.2.6.11 RegExp.prototype [ %Symbol.replace% ] ( string, replaceValue )
          12. 22.2.6.12 RegExp.prototype [ %Symbol.search% ] ( string )
          13. +22.2.6.13 get RegExp.prototype.source
            1. 22.2.6.13.1 EscapeRegExpPattern ( pattern, flags )
          14. 22.2.6.14 RegExp.prototype [ %Symbol.split% ] ( string, substringLimit )
          15. 22.2.6.15 get RegExp.prototype.sticky
          16. 22.2.6.16 RegExp.prototype.test ( string )
          17. 22.2.6.17 RegExp.prototype.toString ( )
          18. 22.2.6.18 get RegExp.prototype.unicode
          19. 22.2.6.19 get RegExp.prototype.unicodeSets
        7. +22.2.7 Abstract Operations for RegExp Matching
          1. 22.2.7.1 RegExpExec ( regexp, string )
          2. 22.2.7.2 RegExpBuiltinExec ( regexp, string )
          3. 22.2.7.3 AdvanceStringIndex ( string, index, unicode )
          4. 22.2.7.4 GetStringIndex ( string, codePointIndex )
          5. 22.2.7.5 Match Records
          6. 22.2.7.6 GetMatchString ( string, match )
          7. 22.2.7.7 GetMatchIndexPair ( string, match )
          8. 22.2.7.8 MakeMatchIndicesIndexPairArray ( string, indices, groupNames, hasGroups )
        8. +22.2.8 Properties of RegExp Instances
          1. 22.2.8.1 lastIndex
        9. +22.2.9 RegExp String Iterator Objects
          1. 22.2.9.1 CreateRegExpStringIterator ( regexp, string, global, fullUnicode )
          2. +22.2.9.2 The %RegExpStringIteratorPrototype% Object
            1. 22.2.9.2.1 %RegExpStringIteratorPrototype%.next ( )
            2. 22.2.9.2.2 %RegExpStringIteratorPrototype% [ %Symbol.toStringTag% ]
          3. 22.2.9.3 Properties of RegExp String Iterator Instances
    24. +23 Indexed Collections
      1. +23.1 Array Objects
        1. +23.1.1 The Array Constructor
          1. 23.1.1.1 Array ( ...values )
        2. +23.1.2 Properties of the Array Constructor
          1. 23.1.2.1 Array.from ( items [ , mapper [ , thisArg ] ] )
          2. 23.1.2.2 Array.fromAsync ( items [ , mapper [ , thisArg ] ] )
          3. 23.1.2.3 Array.isArray ( arg )
          4. 23.1.2.4 Array.of ( ...items )
          5. 23.1.2.5 Array.prototype
          6. 23.1.2.6 get Array [ %Symbol.species% ]
        3. +23.1.3 Properties of the Array Prototype Object
          1. 23.1.3.1 Array.prototype.at ( index )
          2. +23.1.3.2 Array.prototype.concat ( ...items )
            1. 23.1.3.2.1 IsConcatSpreadable ( obj )
          3. 23.1.3.3 Array.prototype.constructor
          4. 23.1.3.4 Array.prototype.copyWithin ( target, start [ , end ] )
          5. 23.1.3.5 Array.prototype.entries ( )
          6. 23.1.3.6 Array.prototype.every ( callback [ , thisArg ] )
          7. 23.1.3.7 Array.prototype.fill ( value [ , start [ , end ] ] )
          8. 23.1.3.8 Array.prototype.filter ( callback [ , thisArg ] )
          9. 23.1.3.9 Array.prototype.find ( predicate [ , thisArg ] )
          10. 23.1.3.10 Array.prototype.findIndex ( predicate [ , thisArg ] )
          11. 23.1.3.11 Array.prototype.findLast ( predicate [ , thisArg ] )
          12. +23.1.3.12 Array.prototype.findLastIndex ( predicate [ , thisArg ] )
            1. 23.1.3.12.1 FindViaPredicate ( obj, length, direction, predicate, thisArg )
          13. +23.1.3.13 Array.prototype.flat ( [ depth ] )
            1. 23.1.3.13.1 FlattenIntoArray ( target, source, sourceLength, start, depth [ , mapperFunc [ , thisArg ] ] )
          14. 23.1.3.14 Array.prototype.flatMap ( mapperFunc [ , thisArg ] )
          15. 23.1.3.15 Array.prototype.forEach ( callback [ , thisArg ] )
          16. 23.1.3.16 Array.prototype.includes ( searchElement [ , fromIndex ] )
          17. 23.1.3.17 Array.prototype.indexOf ( searchElement [ , fromIndex ] )
          18. +23.1.3.18 Array.prototype.join ( separator )
            1. 23.1.3.18.1 JoinIndexedProperties ( obj, length, separator [ , methodName [ , methodArgs ] ] )
          19. 23.1.3.19 Array.prototype.keys ( )
          20. 23.1.3.20 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
          21. 23.1.3.21 Array.prototype.map ( callback [ , thisArg ] )
          22. 23.1.3.22 Array.prototype.pop ( )
          23. 23.1.3.23 Array.prototype.push ( ...items )
          24. 23.1.3.24 Array.prototype.reduce ( callback [ , initialValue ] )
          25. 23.1.3.25 Array.prototype.reduceRight ( callback [ , initialValue ] )
          26. 23.1.3.26 Array.prototype.reverse ( )
          27. 23.1.3.27 Array.prototype.shift ( )
          28. 23.1.3.28 Array.prototype.slice ( start, end )
          29. 23.1.3.29 Array.prototype.some ( callback [ , thisArg ] )
          30. +23.1.3.30 Array.prototype.sort ( comparator )
            1. 23.1.3.30.1 SortIndexedProperties ( obj, length, sortCompare, holes )
            2. 23.1.3.30.2 CompareArrayElements ( x, y, comparator )
          31. 23.1.3.31 Array.prototype.splice ( start, deleteCount, ...items )
          32. +23.1.3.32 Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
            1. 23.1.3.32.1 LocalizedListSeparator ( )
          33. 23.1.3.33 Array.prototype.toReversed ( )
          34. 23.1.3.34 Array.prototype.toSorted ( comparator )
          35. 23.1.3.35 Array.prototype.toSpliced ( start, skipCount, ...items )
          36. 23.1.3.36 Array.prototype.toString ( )
          37. 23.1.3.37 Array.prototype.unshift ( ...items )
          38. 23.1.3.38 Array.prototype.values ( )
          39. 23.1.3.39 Array.prototype.with ( index, value )
          40. 23.1.3.40 Array.prototype [ %Symbol.iterator% ] ( )
          41. 23.1.3.41 Array.prototype [ %Symbol.unscopables% ]
        4. +23.1.4 Properties of Array Instances
          1. 23.1.4.1 length
        5. +23.1.5 Array Iterator Objects
          1. 23.1.5.1 CreateArrayIterator ( array, kind )
          2. +23.1.5.2 The %ArrayIteratorPrototype% Object
            1. 23.1.5.2.1 %ArrayIteratorPrototype%.next ( )
            2. 23.1.5.2.2 %ArrayIteratorPrototype% [ %Symbol.toStringTag% ]
          3. 23.1.5.3 Properties of Array Iterator Instances
      2. +23.2 TypedArray Objects
        1. +23.2.1 The %TypedArray% Intrinsic Object
          1. 23.2.1.1 %TypedArray% ( )
        2. +23.2.2 Properties of the %TypedArray% Intrinsic Object
          1. 23.2.2.1 %TypedArray%.from ( source [ , mapper [ , thisArg ] ] )
          2. 23.2.2.2 %TypedArray%.of ( ...items )
          3. 23.2.2.3 %TypedArray%.prototype
          4. 23.2.2.4 get %TypedArray% [ %Symbol.species% ]
        3. +23.2.3 Properties of the %TypedArray% Prototype Object
          1. 23.2.3.1 %TypedArray%.prototype.at ( index )
          2. 23.2.3.2 get %TypedArray%.prototype.buffer
          3. 23.2.3.3 get %TypedArray%.prototype.byteLength
          4. 23.2.3.4 get %TypedArray%.prototype.byteOffset
          5. 23.2.3.5 %TypedArray%.prototype.constructor
          6. 23.2.3.6 %TypedArray%.prototype.copyWithin ( target, start [ , end ] )
          7. 23.2.3.7 %TypedArray%.prototype.entries ( )
          8. 23.2.3.8 %TypedArray%.prototype.every ( callback [ , thisArg ] )
          9. 23.2.3.9 %TypedArray%.prototype.fill ( value [ , start [ , end ] ] )
          10. 23.2.3.10 %TypedArray%.prototype.filter ( callback [ , thisArg ] )
          11. 23.2.3.11 %TypedArray%.prototype.find ( predicate [ , thisArg ] )
          12. 23.2.3.12 %TypedArray%.prototype.findIndex ( predicate [ , thisArg ] )
          13. 23.2.3.13 %TypedArray%.prototype.findLast ( predicate [ , thisArg ] )
          14. 23.2.3.14 %TypedArray%.prototype.findLastIndex ( predicate [ , thisArg ] )
          15. 23.2.3.15 %TypedArray%.prototype.forEach ( callback [ , thisArg ] )
          16. 23.2.3.16 %TypedArray%.prototype.includes ( searchElement [ , fromIndex ] )
          17. 23.2.3.17 %TypedArray%.prototype.indexOf ( searchElement [ , fromIndex ] )
          18. 23.2.3.18 %TypedArray%.prototype.join ( separator )
          19. 23.2.3.19 %TypedArray%.prototype.keys ( )
          20. 23.2.3.20 %TypedArray%.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
          21. 23.2.3.21 get %TypedArray%.prototype.length
          22. 23.2.3.22 %TypedArray%.prototype.map ( callback [ , thisArg ] )
          23. 23.2.3.23 %TypedArray%.prototype.reduce ( callback [ , initialValue ] )
          24. 23.2.3.24 %TypedArray%.prototype.reduceRight ( callback [ , initialValue ] )
          25. 23.2.3.25 %TypedArray%.prototype.reverse ( )
          26. +23.2.3.26 %TypedArray%.prototype.set ( source [ , offset ] )
            1. 23.2.3.26.1 SetTypedArrayFromArrayLike ( target, targetOffset, source )
            2. 23.2.3.26.2 SetTypedArrayFromTypedArray ( target, targetOffset, source )
          27. 23.2.3.27 %TypedArray%.prototype.slice ( start, end )
          28. 23.2.3.28 %TypedArray%.prototype.some ( callback [ , thisArg ] )
          29. 23.2.3.29 %TypedArray%.prototype.sort ( comparator )
          30. 23.2.3.30 %TypedArray%.prototype.subarray ( start, end )
          31. 23.2.3.31 %TypedArray%.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
          32. 23.2.3.32 %TypedArray%.prototype.toReversed ( )
          33. 23.2.3.33 %TypedArray%.prototype.toSorted ( comparator )
          34. 23.2.3.34 %TypedArray%.prototype.toString ( )
          35. 23.2.3.35 %TypedArray%.prototype.values ( )
          36. 23.2.3.36 %TypedArray%.prototype.with ( index, value )
          37. 23.2.3.37 %TypedArray%.prototype [ %Symbol.iterator% ] ( )
          38. 23.2.3.38 get %TypedArray%.prototype [ %Symbol.toStringTag% ]
        4. +23.2.4 Abstract Operations for TypedArray Objects
          1. 23.2.4.1 TypedArrayCreateFromConstructor ( ctor, argList )
          2. 23.2.4.2 TypedArrayCreateSameType ( exemplar, length )
          3. 23.2.4.3 TypedArraySpeciesCreate ( exemplar, argList )
          4. 23.2.4.4 ValidateTypedArray ( obj, order )
          5. 23.2.4.5 ValidateTypedArrayBounds ( ta, order )
          6. 23.2.4.6 TypedArrayElementSize ( obj )
          7. 23.2.4.7 TypedArrayElementType ( obj )
          8. 23.2.4.8 CompareTypedArrayElements ( x, y, comparator )
        5. +23.2.5 The TypedArray Constructors
          1. +23.2.5.1 TypedArray ( ...args )
            1. 23.2.5.1.1 AllocateTypedArray ( ctorName, newTarget, defaultProto [ , length ] )
            2. 23.2.5.1.2 InitializeTypedArrayFromTypedArray ( obj, sourceArray )
            3. 23.2.5.1.3 InitializeTypedArrayFromArrayBuffer ( obj, buffer, byteOffset, length )
            4. 23.2.5.1.4 InitializeTypedArrayFromElements ( obj, source )
            5. 23.2.5.1.5 AllocateTypedArrayBuffer ( obj, length )
        6. +23.2.6 Properties of the TypedArray Constructors
          1. 23.2.6.1 TypedArray.BYTES_PER_ELEMENT
          2. 23.2.6.2 TypedArray.prototype
        7. +23.2.7 Properties of the TypedArray Prototype Objects
          1. 23.2.7.1 TypedArray.prototype.BYTES_PER_ELEMENT
          2. 23.2.7.2 TypedArray.prototype.constructor
        8. 23.2.8 Properties of TypedArray Instances
      3. +23.3 Uint8Array Objects
        1. +23.3.1 Additional Properties of the Uint8Array Constructor
          1. 23.3.1.1 Uint8Array.fromBase64 ( string [ , options ] )
          2. 23.3.1.2 Uint8Array.fromHex ( string )
        2. +23.3.2 Additional Properties of the Uint8Array Prototype Object
          1. 23.3.2.1 Uint8Array.prototype.setFromBase64 ( string [ , options ] )
          2. 23.3.2.2 Uint8Array.prototype.setFromHex ( string )
          3. 23.3.2.3 Uint8Array.prototype.toBase64 ( [ options ] )
          4. 23.3.2.4 Uint8Array.prototype.toHex ( )
        3. +23.3.3 Abstract Operations for Uint8Array Objects
          1. 23.3.3.1 ValidateUint8Array ( ta )
          2. 23.3.3.2 GetUint8ArrayBytes ( ta )
          3. 23.3.3.3 SetUint8ArrayBytes ( into, bytes )
          4. 23.3.3.4 SkipAsciiWhitespace ( string, index )
          5. 23.3.3.5 DecodeFinalBase64Chunk ( chunk, throwOnExtraBits )
          6. 23.3.3.6 DecodeFullLengthBase64Chunk ( chunk )
          7. 23.3.3.7 FromBase64 ( string, alphabet, lastChunkHandling [ , maxLength ] )
          8. 23.3.3.8 FromHex ( string [ , maxLength ] )
    25. +24 Keyed Collections
      1. +24.1 Map Objects
        1. +24.1.1 The Map Constructor
          1. 24.1.1.1 Map ( [ iterable ] )
          2. 24.1.1.2 AddEntriesFromIterable ( target, iterable, adder )
        2. +24.1.2 Properties of the Map Constructor
          1. 24.1.2.1 Map.groupBy ( items, callback )
          2. 24.1.2.2 Map.prototype
          3. 24.1.2.3 get Map [ %Symbol.species% ]
        3. +24.1.3 Properties of the Map Prototype Object
          1. 24.1.3.1 Map.prototype.clear ( )
          2. 24.1.3.2 Map.prototype.constructor
          3. 24.1.3.3 Map.prototype.delete ( key )
          4. 24.1.3.4 Map.prototype.entries ( )
          5. 24.1.3.5 Map.prototype.forEach ( callback [ , thisArg ] )
          6. 24.1.3.6 Map.prototype.get ( key )
          7. 24.1.3.7 Map.prototype.getOrInsert ( key, value )
          8. 24.1.3.8 Map.prototype.getOrInsertComputed ( key, callback )
          9. 24.1.3.9 Map.prototype.has ( key )
          10. 24.1.3.10 Map.prototype.keys ( )
          11. 24.1.3.11 Map.prototype.set ( key, value )
          12. 24.1.3.12 get Map.prototype.size
          13. 24.1.3.13 Map.prototype.values ( )
          14. 24.1.3.14 Map.prototype [ %Symbol.iterator% ] ( )
          15. 24.1.3.15 Map.prototype [ %Symbol.toStringTag% ]
        4. 24.1.4 Properties of Map Instances
        5. +24.1.5 Map Iterator Objects
          1. 24.1.5.1 CreateMapIterator ( map, kind )
          2. +You are visitor 01402503 — GeezerVison does not store the pages you look up.
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