This is the static html output that was generated by my cfg parser. See blog post.
Also: this is a good reference for the ECMAScript 5 specification ;)
A1 Lexical Grammar
: SourceCharacter : InputElementDiv WhiteSpace LineTerminator Comment Token DivPunctuator : InputElementRegExp WhiteSpace LineTerminator Comment Token RegularExpressionLiteral : TAB '0009' : VT '000B' : FF '000C' : SP '0020' : NBSP '00A0' : BOM 'FEFF' : USP : WhiteSpace TAB VT FF SP NBSP BOM USP : LF '000A' : CR '000D' : LS '2028' : PS '2029' : LineTerminator LF CR LS PS : LineTerminatorSequence LF CR no{LF}here LS PS CR LF : Comment MultiLineComment SingleLineComment : MultiLineComment "/*" optional{MultiLineCommentChars} "*/" : MultiLineCommentChars MultiLineNotAsteriskChar optional{MultiLineCommentChars} "*" no{"/"}here optional{PostAsteriskCommentChars} : PostAsteriskCommentChars MultiLineNotForwardSlashOrAsteriskChar optional{MultiLineCommentChars} "*" no{"/"}here optional{PostAsteriskCommentChars} : MultiLineNotAsteriskChar SourceCharacter except{"*"} : MultiLineNotForwardSlashOrAsteriskChar SourceCharacter except{any{"/" "*"}} : SingleLineComment "//" optional{SingleLineCommentChars} : SingleLineCommentChars SingleLineCommentChar optional{SingleLineCommentChars} : SingleLineCommentChar SourceCharacter except{LineTerminator} : Token IdentifierName Punctuator NumericLiteral StringLiteral : Identifier IdentifierName except{ReservedKeyword} : IdentifierName IdentifierStart IdentifierName IdentifierPart : IdentifierStart UnicodeLetter "$" "_" "\" UnicodeEscapeSequence : ZWNJ '200C' : ZWJ '200D' : IdentifierPart IdentifierStart UnicodeCombiningMark UnicodeDigit UnicodeConnectorPunctuation ZWNJ ZWJ : UnicodeLetter : UnicodeCombiningMark : UnicodeDigit : UnicodeConnectorPunctuation : ReservedKeyword Keyword FutureReservedKeyword NullLiteral BooleanLiteral : Keyword any{"break" "case" "catch" "continue" "debugger" "default" "delete" "do" "else" "finally" "for" "function" "if" "in" "instanceof" "new" "return" "switch" "this" "throw" "try" "typeof" "var" "void" "while" "with"} : FutureReservedKeyword any{"class" "const" "enum" "export" "extends" "import" "super"} : Punctuator any{"{" "}" "(" ")" "[" "]" "." ";" "," "<" ">" "<=" ">=" "==" "!=" "===" "!==" "+" "-" "*" "%" "++" "--" "|" "^" "<<" ">>" ">>>" "&" "|" "^" "!" "~" "&&" "||" "?" ":" "=" "+=" "-=" "*=" "%=" "<<=" ">>=" ">>>=" "&=" "|=" "^="} : DivPunctuator any{"/" "/="} : Literal NullLiteral BooleanLiteral NumericLiteral StringLiteral RegularExpressionLiteral : NullLiteral "null" : BooleanLiteral "true" "false" : NumericLiteral DecimalLiteral HexIntegerLiteral : DecimalLiteral DecimalIntegerLiteral "." optional{DecimalDigits} optional{ExponentPart} "." DecimalDigits optional{ExponentPart} DecimalIntegerLiteral optional{ExponentPart} : DecimalIntegerLiteral "0" NonZeroDigit optional{DecimalDigits} : DecimalDigits DecimalDigit DecimalDigits DecimalDigit : DecimalDigit any{"0" "1" "2" "3" "4" "5" "6" "7" "8" "9"} : NonZeroDigit any{"1" "2" "3" "4" "5" "6" "7" "8" "9"} : ExponentPart ExponentIndicator SignedInteger : ExponentIndicator any{"e" "E"} : SignedInteger DecimalDigits "+" DecimalDigits "-" DecimalDigits : HexIntegerLiteral "0x" HexDigit "0X" HexDigit HexIntegerLiteral HexDigit : HexDigit any{"0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "A" "B" "C" "D" "E" "F" "a" "b" "c" "d" "e" "f"} : StringLiteral """ optional{DoubleStringCharacters} """ "'" optional{SingleStringCharacters} "'" : DoubleStringCharacters DoubleStringCharacter optional{DoubleStringCharacters} : SingleStringCharacters SingleStringCharacter optional{SingleStringCharacters} : DoubleStringCharacter SourceCharacter except{any{""" "\" LineTerminator}} "\" EscapeSequence LineContinuation : SingleStringCharacter SourceCharacter except{any{"'" "\" LineTerminator}} "\" EscapeSequence LineContinuation : LineContinuation "\" LineTerminatorSequence : EscapeSequence CharacterEscapeSequence "0" no{DecimalDigit}here HexEscapeSequence UnicodeEscapeSequence : CharacterEscapeSequence SingleEscapeCharacter NonEscapeCharacter : SingleEscapeCharacter any{"'" """ "\" "b" "f" "n" "r" "t" "v"} : NonEscapeCharacter SourceCharacter except{any{EscapeCharacter LineTerminator}} : EscapeCharacter SingleEscapeCharacter DecimalDigit "x" "u" : HexEscapeSequence "x" HexDigit HexDigit : UnicodeEscapeSequence "u" HexDigit HexDigit HexDigit HexDigit : RegularExpressionLiteral "/" RegularExpressionBody "/" optional{RegularExpressionFlags} : RegularExpressionBody RegularExpressionFirstChar RegularExpressionChars : RegularExpressionChars "[empty]" RegularExpressionChars RegularExpressionChar : RegularExpressionFirstChar RegularExpressionNonTerminator except{any{"*" "\" "/" "["}} RegularExpressionBackslashSequence RegularExpressionClass : RegularExpressionChar RegularExpressionNonTerminator except{any{"\" "/" "["}} RegularExpressionBackslashSequence RegularExpressionClass : RegularExpressionBackslashSequence "\" RegularExpressionNonTerminator : RegularExpressionNonTerminator SourceCharacter except{LineTerminator} : RegularExpressionClass "[" RegularExpressionClassChars "]" : RegularExpressionClassChars "[empty]" RegularExpressionClassChars RegularExpressionClassChar : RegularExpressionClassChar RegularExpressionNonTerminator except{any{"]" "\"}} RegularExpressionBackslashSequenceA2 Number conversions
: RegularExpressionFlags IdentifierPart RegularExpressionFlags IdentifierPart : StringNumericLiteral optional{StrWhiteSpace} optional{StrWhiteSpace} StrNumericLiteral optional{StrWhiteSpace} : StrWhiteSpace StrWhiteSpaceChar optional{StrWhiteSpace} : StrWhiteSpaceChar WhiteSpace LineTerminator : StrNumericLiteral StrDecimalLiteral HexIntegerLiteral : StrDecimalLiteral StrUnsignedDecimalLiteral "+" StrUnsignedDecimalLiteral "-" StrUnsignedDecimalLiteralA3 Expressions
: StrUnsignedDecimalLiteral "Infinity" DecimalDigits "." optional{DecimalDigits} optional{ExponentPart} "." DecimalDigits optional{ExponentPart} DecimalDigits optional{ExponentPart} : PrimaryExpression "this" Identifier Literal ArrayLiteral ObjectLiteral "(" Expression ")" : ArrayLiteral "[" optional{Elision} "]" "[" ElementList "]" "[" ElementList "," optional{Elision} "]" : ElementList optional{Elision} AssignmentExpression ElementList "," optional{Elision} AssignmentExpression : Elision "," Elision "," : ObjectLiteral "{" "}" "{" PropertyNameAndValueList "}" "{" PropertyNameAndValueList "," "}" : PropertyNameAndValueList PropertyAssignment PropertyNameAndValueList "," PropertyAssignment : PropertyAssignment PropertyName ":" AssignmentExpression "get" PropertyName "(" ")" "{" FunctionBody "}" "set" PropertyName "(" PropertySetParameterList ")" "{" FunctionBody "}" : PropertyName IdentifierName StringLiteral NumericLiteral : PropertySetParameterList Identifier : MemberExpression PrimaryExpression FunctionExpression MemberExpression "[" Expression "]" MemberExpression "." IdentifierName "new" MemberExpression Arguments : NewExpression MemberExpression "new" NewExpression : CallExpression MemberExpression Arguments CallExpression Arguments CallExpression "[" Expression "]" CallExpression "." IdentifierName : Arguments "(" ")" "(" ArgumentList ")" : ArgumentList AssignmentExpression ArgumentList "," AssignmentExpression : LeftHandSideExpression NewExpression CallExpression : PostfixExpression LeftHandSideExpression LeftHandSideExpression no{LineTerminator}here "++" LeftHandSideExpression no{LineTerminator}here "--" : UnaryExpression PostfixExpression "delete" UnaryExpression "void" UnaryExpression "typeof" UnaryExpression "++" UnaryExpression "--" UnaryExpression "+" UnaryExpression "-" UnaryExpression "~" UnaryExpression "!" UnaryExpression : MultiplicativeExpression UnaryExpression MultiplicativeExpression "*" UnaryExpression MultiplicativeExpression "/" UnaryExpression MultiplicativeExpression "%" UnaryExpression : AdditiveExpression MultiplicativeExpression AdditiveExpression "+" MultiplicativeExpression AdditiveExpression "-" MultiplicativeExpression : ShiftExpression AdditiveExpression ShiftExpression "<<" AdditiveExpression ShiftExpression ">>" AdditiveExpression ShiftExpression ">>>" AdditiveExpression : RelationalExpression ShiftExpression RelationalExpression "<" ShiftExpression RelationalExpression ">" ShiftExpression RelationalExpression "<=" ShiftExpression RelationalExpression ">=" ShiftExpression RelationalExpression "instanceof" ShiftExpression RelationalExpression "in" ShiftExpression : RelationalExpressionNoIn ShiftExpression RelationalExpressionNoIn "<" ShiftExpression RelationalExpressionNoIn ">" ShiftExpression RelationalExpressionNoIn "<=" ShiftExpression RelationalExpressionNoIn ">=" ShiftExpression RelationalExpressionNoIn "instanceof" ShiftExpression : EqualityExpression RelationalExpression EqualityExpression "==" RelationalExpression EqualityExpression "!=" RelationalExpression EqualityExpression "===" RelationalExpression EqualityExpression "!==" RelationalExpression : EqualityExpressionNoIn RelationalExpressionNoIn EqualityExpressionNoIn "==" RelationalExpressionNoIn EqualityExpressionNoIn "!=" RelationalExpressionNoIn EqualityExpressionNoIn "===" RelationalExpressionNoIn EqualityExpressionNoIn "!==" RelationalExpressionNoIn : BitwiseANDExpression EqualityExpression BitwiseANDExpression "&" EqualityExpression : BitwiseANDExpressionNoIn EqualityExpressionNoIn BitwiseANDExpressionNoIn "&" EqualityExpressionNoIn : BitwiseXORExpression BitwiseANDExpression BitwiseXORExpression "^" BitwiseANDExpression : BitwiseXORExpressionNoIn BitwiseANDExpressionNoIn BitwiseXORExpressionNoIn "^" BitwiseANDExpressionNoIn : BitwiseORExpression BitwiseXORExpression BitwiseORExpression "|" BitwiseXORExpression : BitwiseORExpressionNoIn BitwiseXORExpressionNoIn BitwiseORExpressionNoIn "|" BitwiseXORExpressionNoIn : LogicalANDExpression BitwiseORExpression LogicalANDExpression "&&" BitwiseORExpression : LogicalANDExpressionNoIn BitwiseORExpressionNoIn LogicalANDExpressionNoIn "&&" BitwiseORExpressionNoIn : LogicalORExpression LogicalANDExpression LogicalORExpression "||" LogicalANDExpression : LogicalORExpressionNoIn LogicalANDExpressionNoIn LogicalORExpressionNoIn "||" LogicalANDExpressionNoIn : ConditionalExpression LogicalORExpression LogicalORExpression "?" AssignmentExpression ":" AssignmentExpression : ConditionalExpressionNoIn LogicalORExpressionNoIn LogicalORExpressionNoIn "?" AssignmentExpressionNoIn ":" AssignmentExpressionNoIn : AssignmentExpression ConditionalExpression LeftHandSideExpression AssignmentOperator AssignmentExpression : AssignmentExpressionNoIn ConditionalExpressionNoIn LeftHandSideExpression AssignmentOperator AssignmentExpressionNoIn : AssignmentOperator any{"=" "*=" "/=" "%=" "+=" "-=" "<<=" ">>=" ">>>=" "&=" "^=" "|="} : Expression AssignmentExpression Expression "," AssignmentExpressionA4 Statements
: ExpressionNoIn AssignmentExpressionNoIn ExpressionNoIn "," AssignmentExpressionNoIn : Statement Block VariableStatement EmptyStatement ExpressionStatement IfStatement IterationStatement ContinueStatement BreakStatement ReturnStatement WithStatement LabelledStatement SwitchStatement ThrowStatement TryStatement DebuggerStatement : Block "{" optional{StatementList} "}" : StatementList Statement StatementList Statement : VariableStatement "var" VariableDeclarationList ";" : VariableDeclarationList VariableDeclaration VariableDeclarationList "," VariableDeclaration : VariableDeclarationListNoIn VariableDeclarationNoIn VariableDeclarationListNoIn "," VariableDeclarationNoIn : VariableDeclaration Identifier optional{Initialiser} : VariableDeclarationNoIn Identifier optional{InitialiserNoIn} : Initialiser "=" AssignmentExpression : InitialiserNoIn "=" AssignmentExpressionNoIn : EmptyStatement ";" : ExpressionStatement no{any{"{" "function"}}here Expression ";" : IfStatement "if" "(" Expression ")" Statement "else" Statement "if" "(" Expression ")" Statement : IterationStatement "do" Statement "while" "(" Expression ")" ";" "while" "(" Expression ")" Statement "for" "(" optional{ExpressionNoIn} ";" optional{Expression} ";" optional{Expression} ")" Statement "for" "(" "var" VariableDeclarationListNoIn ";" optional{Expression} ";" optional{Expression} ")" Statement "for" "(" LeftHandSideExpression "in" Expression ")" Statement "for" "(" "var" VariableDeclarationNoIn "in" Expression ")" Statement : ContinueStatement "continue" no{LineTerminator}here optional{Identifier} ";" "continue" LineTerminator ";" : BreakStatement "break" no{LineTerminator}here optional{Identifier} ";" "break" LineTerminator ";" : ReturnStatement "return" no{LineTerminator}here optional{Expression} ";" "return" LineTerminator ";" : WithStatement "with" "(" Expression ")" Statement : SwitchStatement "switch" "(" Expression ")" CaseBlock : CaseBlock "{" optional{CaseClauses} "}" "{" optional{CaseClauses} DefaultClause optional{CaseClauses} "}" : CaseClauses CaseClause CaseClauses CaseClause : CaseClause "case" Expression ":" optional{StatementList} : DefaultClause "default" ":" optional{StatementList} : LabelledStatement Identifier ":" Statement : ThrowStatement "throw" no{LineTerminator}here Expression ";" : TryStatement "try" Block Catch "try" Block Finally "try" Block Catch Finally : Catch "catch" "(" Identifier ")" Block : Finally "finally" BlockA5 Functions and Programs
: DebuggerStatement "debugger" ";" : FunctionDeclaration "function" Identifier "(" optional{FormalParameterList} ")" "{" optional{FunctionBody} "}" : FunctionExpression "function" optional{Identifier} "(" optional{FormalParameterList} ")" "{" optional{FunctionBody} "}" : FormalParameterList Identifier FormalParameterList "," Identifier : FunctionBody optional{SourceElements} : Program optional{SourceElements} : SourceElements SourceElement SourceElements SourceElementA6 Universal Resource Identifier Character Classes
: SourceElement Statement FunctionDeclaration : uri optional{uriCharacters} : uriCharacters uriCharacter optional{uriCharacters} : uriCharacter uriReserved uriUnescaped uriEscaped : uriReserved any{";" "/" "?" ":" "@" "&" "=" "+" "$" ","} : uriUnescaped uriAlpha DecimalDigit uriMark : uriEscaped "%" HexDigit HexDigit : uriAlpha any{"a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z" "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R" "S" "T" "U" "V" "W" "X" "Y" "Z"}A7 Regular Expressions
: uriMark any{"-" "_" "." "!" "~" "*" "�" "(" ")"} : Pattern Disjunction : Disjunction Alternative Alternative "|" Disjunction : Alternative "[empty]" Alternative Term : Term Assertion Atom Atom Quantifier : Assertion "^" "$" "\" "b" "\" "B" "(" "?=" Disjunction ")" "(" "?!" Disjunction ")" : Quantifier QuantifierPrefix QuantifierPrefix "?" : QuantifierPrefix "*" "+" "?" "{" DecimalDigits "}" "{" DecimalDigits "," "}" "{" DecimalDigits "," DecimalDigits "}" : Atom PatternCharacter "." "\" AtomEscape CharacterClass "(" Disjunction ")" "(" "?" ":" Disjunction ")" : PatternCharacter SourceCharacter except{any{"^" "$" "\" "." "*" "+" "?" "(" ")" "[" "]" "{" "}" "|"}} : AtomEscape DecimalEscape CharacterEscape CharacterClassEscape : CharacterEscape ControlEscape "c" ControlLetter HexEscapeSequence UnicodeEscapeSequence IdentityEscape : ControlEscape any{"f" "n" "r" "t" "v"} : ControlLetter any{"a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z" "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R" "S" "T" "U" "V" "W" "X" "Y" "Z"} : IdentityEscape SourceCharacter except{any{IdentifierPart ZWJ ZWNJ}} : DecimalEscape DecimalIntegerLiteral no{DecimalDigit}here : CharacterClassEscape any{"d" "D" "s" "S" "w" "W"} : CharacterClass//meh.the^isoptional."[" no{"^"}here ClassRanges "]" "[" "^" ClassRanges "]" : ClassRanges "[empty]" NonemptyClassRanges : NonemptyClassRanges ClassAtom ClassAtom NonemptyClassRangesNoDash ClassAtom "�" ClassAtom ClassRanges : NonemptyClassRangesNoDash ClassAtom ClassAtomNoDash NonemptyClassRangesNoDash ClassAtomNoDash "�" ClassAtom ClassRanges : ClassAtom "-" ClassAtomNoDash : ClassAtomNoDash SourceCharacter except{any{"\" "]" "-"}} "\" ClassEscapeA81 JSON Lexical Grammar
: ClassEscape DecimalEscape "b" CharacterEscape CharacterClassEscape : JSONWhiteSpace TAB CR LF SP : JSONString """ optional{JSONStringCharacters} """ : JSONStringCharacters JSONStringCharacter optional{JSONStringCharacters} : JSONStringCharacter SourceCharacter except{any{""" "\" '0000' '0001' '0002' '0003' '0004' '0005' '0006' '0007' '0008' '0009' '000A' '000B' '000C' '000D' '000E' '000F' '0010' '0011' '0012' '0013' '0014' '0015' '0016' '0017' '0018' '0019' '001A' '001B' '001C' '001D' '001E' '001F'}} "\" JSONEscapeSequence : JSONEscapeSequence JSONEscapeCharacter UnicodeEscapeSequence : JSONEscapeCharacter any{""" "/" "\" "b" "f" "n" "r" "t"} : JSONNumber optional{"-"} DecimalIntegerLiteral optional{JSONFraction} optional{ExponentPart} : JSONFraction "." DecimalDigits : JSONNullLiteral NullLiteralA82 JSON Syntactic Grammar
: JSONBooleanLiteral BooleanLiteral : JSONText JSONValue : JSONValue JSONNullLiteral JSONBooleanLiteral JSONObject JSONArray JSONString JSONNumber : JSONObject "{" "}" "{" JSONMemberList "}" : JSONMember JSONString ":" JSONValue : JSONMemberList JSONMember JSONMemberList "," JSONMember : JSONArray "[" "]" "[" JSONElementList "]" : JSONElementList JSONValue JSONElementList "," JSONValue