New in JavaScript

이 장은 JavaScript 버전 이력에 관한 정보 및 Mozilla/SpiderMonkey 기반 JavaScript 애플리케이션, 가령 Firefox의 구현 상태를 포함합니다.

ECMAScript 버전

언어 리소스
JavaScript 언어의 기반이 된 ECMAScript 표준에 대해 자세히 알아보세요.
ECMAScript 5 지원
Mozilla 기반 엔진 및 제품에서 현재 표준 ECMA-262 Edition 5.1의 구현 상태.
ECMAScript 6 지원
Mozilla 기반 엔진 및 제품에서 초안 ECMA-262 Edition 6 (ES2015/ES6)의 구현 상태.
ECMAScript Next 지원
Mozilla 기반 엔진 및 제품에서 연간 (ES2016/ES2017/ES2018/...) 출시 계획에 따라 예정된 ECMA-262 기능의 구현 상태.

JavaScript 출시 기록

Firefox JavaScript changelog
Firefox 5 이상에서 구현된 JavaScript 기능은 이 changelog 참조.

JavaScript 버전

사라짐 ( ). 명백한 버전 관리 및 언어 기능의 채택은 Mozilla 전용이었고 제거되는 과정에 있습니다. Firefox 4는 JavaScript 버전 (1.8.5)에 참조되었던 마지막 버전이었습니다. 새로운 ECMA 표준이 있다면, JavaScript 언어 기능은 이제 종종 ECMA-262 Edition 가령 Edition 6 (ES2015/ES6) 내 그들의 초기 정의에 언급됩니다.

JavaScript는 Netscape Navigator 2.0 및 Internet Explorer 2.0에서 March 1996에 버전 1.0으로 출시되었습니다.

JavaScript 1.1
Netscape Navigator 3.0에 실린 버전. August 19, 1996에 출시됨.
JavaScript 1.2
Netscape Navigator 4.0-4.05에 실린 버전. June 11, 1997에 출시됨.
JavaScript 1.3
Netscape Navigator 4.06-4.7x에 실린 버전. October 19, 1998에 출시됨.
ECMA-262 1st 및 2nd Edition을 따르는 표준화 작업.
JavaScript 1.4
Netscape의 서버측 JavaScript에 실린 버전. 1999에 출시됨.
JavaScript 1.5
Netscape Navigator 6.0 및 Firefox 1.0에 실린 버전. November 14, 2000에 출시됨.
ECMA-262 3rd Edition을 따르는 표준화 작업.
JavaScript 1.6
Firefox 1.5에 실린 버전. November 2005에 출시됨.
ECMAScript for XML (E4X), 새로운 Array 메서드 더하기 String 및 Array generics 포함.
JavaScript 1.7
Firefox 2에 실린 버전. October 2006에 출시됨.
생성기, 반복기, 배열 내포(comprehension), let 식 및 해체 할당 포함.
JavaScript 1.8
Firefox 3에 실린 버전. June 2008에 출시됨.
식 클로저, 생성기 식 및 Array.reduce() 포함
JavaScript 1.8.1
Firefox 3.5에 실린 버전. June 30, 2009에 출시됨.
TraceMonkey JIT 포함 및 native JSON 지원.
JavaScript 1.8.2
Firefox 3.6에 실린 버전. June 22, 2009에 출시됨.
minor changes만 포함.
JavaScript 1.8.5
Firefox 4에 실린 버전. July 27, 2010에 출시됨.
ECMA-262 Edition 5를 따르는 많은 새 기능 포함.
이게 마지막 JavaScript 버전입니다.

Last modified:

, by MDN contributors
관련 주제
  1. JavaScript
  2. Tutorials:
  3. Complete beginners
    1. JavaScript basics
    2. JavaScript first steps
    3. JavaScript building blocks
    4. Introducing JavaScript objects
  4. JavaScript Guide
    1. Introduction
    2. Grammar and types
    3. Control flow and error handling
    4. Loops and iteration
    5. Functions
    6. Expressions and operators
    7. Numbers and dates
    8. Text formatting
    9. Regular expressions
    10. Indexed collections
    11. Keyed collections
    12. Working with objects
    13. Details of the object model
    14. Using promises
    15. Iterators and generators
    16. Meta programming
  5. Intermediate
    1. Introducing JavaScript objects
    2. Client-side web APIs
    3. A re-introduction to JavaScript
    4. JavaScript data structures
    5. Equality comparisons and sameness
    6. Closures
  6. Advanced
    1. Inheritance and the prototype chain
    2. Strict mode
    3. JavaScript typed arrays
    4. Memory Management
    5. Concurrency model and Event Loop
  7. References:
  8. Built-in objects
    1. Array
    2. ArrayBuffer
    3. AsyncFunction
    4. Atomics
    5. BigInt
    6. Boolean
    7. DataView
    8. Date
    9. Error
    10. EvalError
    11. Float32Array [Translate]
    12. Float64Array [Translate]
    13. Function
    14. Generator
    15. GeneratorFunction
    16. Infinity
    17. Int16Array [Translate]
    18. Int32Array [Translate]
    19. Int8Array [Translate]
    20. InternalError
    21. Intl
    22. Intl.Collator [Translate]
    23. Intl.DateTimeFormat
    24. Intl.ListFormat [Translate]
    25. Intl.NumberFormat
    26. Intl.PluralRules [Translate]
    27. Intl.RelativeTimeFormat [Translate]
    28. JSON
    29. Map
    30. Math
    31. NaN
    32. Number
    33. Object
    34. Promise
    35. Proxy
    36. RangeError
    37. ReferenceError
    38. Reflect
    39. RegExp
    40. Set
    41. SharedArrayBuffer
    42. String
    43. Symbol
    44. SyntaxError
    45. TypeError
    46. TypedArray
    47. URIError [Translate]
    48. Uint16Array
    49. Uint32Array [Translate]
    50. Uint8Array [Translate]
    51. Uint8ClampedArray [Translate]
    52. WeakMap
    53. WeakSet
    54. WebAssembly
    55. decodeURI()
    56. decodeURIComponent()
    57. encodeURI()
    58. encodeURIComponent()
    59. escape() [Translate]
    60. eval()
    61. isFinite()
    62. isNaN()
    63. null
    64. parseFloat()
    65. parseInt()
    66. undefined
    67. unescape() [Translate]
    68. uneval()
  9. Expressions & operators
    1. 산술연산자
    2. Array comprehensions
    3. 할당 연산자
    4. 비트 연산자
    5. 콤마 연산자
    6. 비교 연산자
    7. 삼항 조건 연산자
    8. 구조 분해 할당
    9. Expression closures
    10. Generator comprehensions [Translate]
    11. Grouping operator
    12. Legacy generator function expression [Translate]
    13. 논리 연산자
    14. 객체 초기자
    15. 연산자 우선순위
    16. Pipeline operator [Translate]
    17. 속성 접근자
    18. Spread 문법
    19. async function 표현식
    20. await
    21. class 식
    22. delete operator
    23. 함수 표현식
    24. function* expression
    25. in 연산자
    26. instanceof
    27. new operator
    28. new.target
    29. super
    30. this
    31. typeof
    32. void operator
    33. yield
    34. yield*
  10. Statements & declarations
    1. Legacy generator function
    2. async function
    3. block
    4. break
    5. class
    6. const
    7. continue
    8. debugger
    9. default
    10. do...while
    11. empty
    12. export
    13. for
    14. for await...of [Translate]
    15. for each...in [Translate]
    16. for...in
    17. for...of
    18. 함수 선언
    19. function*
    20. if...else
    21. import
    22. import.meta [Translate]
    23. label
    24. let
    25. return
    26. switch
    27. throw
    28. try...catch
    29. var
    30. while
    31. with
  11. Functions
    1. 화살표 함수
    2. 기본 매개변수
    3. 메서드 정의
    4. Rest 파라미터
    5. arguments 객체
    6. getter
    7. setter
  12. Classes
    1. constructor
    2. extends
    3. static
  13. Errors
    1. Error: Permission denied to access property "x"
    2. InternalError: too much recursion
    3. RangeError: argument is not a valid code point
    4. RangeError: invalid array length
    5. RangeError: invalid date
    6. RangeError: precision is out of range
    7. RangeError: radix must be an integer
    8. RangeError: repeat count must be less than infinity
    9. RangeError: repeat count must be non-negative
    10. ReferenceError: "x" is not defined
    11. ReferenceError: assignment to undeclared variable "x"
    12. ReferenceError: can't access lexical declaration`X' before initialization
    13. ReferenceError: deprecated caller or arguments usage
    14. ReferenceError: invalid assignment left-hand side
    15. ReferenceError: reference to undefined property "x"
    16. SyntaxError: "0"-prefixed octal literals and octal escape seq. are deprecated [Translate]
    17. SyntaxError: "use strict" not allowed in function with non-simple parameters
    18. SyntaxError: "x" is a reserved identifier
    19. SyntaxError: JSON.parse: bad parsing
    20. SyntaxError: Malformed formal parameter
    21. SyntaxError: Unexpected token
    22. SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
    23. SyntaxError: a declaration in the head of a for-of loop can't have an initializer
    24. SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
    25. SyntaxError: for-in loop head declarations may not have initializers
    26. SyntaxError: function statement requires a name
    27. SyntaxError: identifier starts immediately after numeric literal
    28. SyntaxError: illegal character
    29. SyntaxError: invalid regular expression flag "x"
    30. SyntaxError: missing ) after argument list
    31. SyntaxError: missing ) after condition
    32. SyntaxError: missing : after property id
    33. SyntaxError: missing ; before statement
    34. SyntaxError: missing = in const declaration
    35. SyntaxError: missing ] after element list
    36. SyntaxError: missing formal parameter [Translate]
    37. SyntaxError: missing name after . operator [Translate]
    38. SyntaxError: missing variable name [Translate]
    39. SyntaxError: missing } after function body [Translate]
    40. SyntaxError: missing } after property list
    41. SyntaxError: redeclaration of formal parameter "x" [Translate]
    42. SyntaxError: return not in function
    43. SyntaxError: test for equality (==) mistyped as assignment (=)? [Translate]
    44. SyntaxError: unterminated string literal [Translate]
    45. TypeError: "x" has no properties [Translate]
    46. TypeError: "x" is (not) "y"
    47. TypeError: "x" is not a constructor
    48. TypeError: "x" is not a function
    49. TypeError: "x" is not a non-null object [Translate]
    50. TypeError: "x" is read-only
    51. TypeError: 'x' is not iterable
    52. TypeError: More arguments needed [Translate]
    53. TypeError: Reduce of empty array with no initial value [Translate]
    54. TypeError: can't access dead object [Translate]
    55. TypeError: can't access property "x" of "y" [Translate]
    56. TypeError: can't define property "x": "obj" is not extensible [Translate]
    57. TypeError: can't delete non-configurable array element [Translate]
    58. TypeError: can't redefine non-configurable property "x" [Translate]
    59. TypeError: cannot use 'in' operator to search for 'x' in 'y' [Translate]
    60. TypeError: cyclic object value [Translate]
    61. TypeError: invalid 'instanceof' operand 'x' [Translate]
    62. TypeError: invalid Array.prototype.sort argument [Translate]
    63. TypeError: invalid arguments [Translate]
    64. TypeError: invalid assignment to const "x" [Translate]
    65. TypeError: property "x" is non-configurable and can't be deleted [Translate]
    66. TypeError: setting getter-only property "x" [Translate]
    67. TypeError: variable "x" redeclares argument [Translate]
    68. URIError: malformed URI sequence [Translate]
    69. Warning: -file- is being assigned a //# sourceMappingURL, but already has one [Translate]
    70. SyntaxError: "x" is not a legal ECMA-262 octal constant
    71. Warning: Date.prototype.toLocaleFormat is deprecated [Translate]
    72. Warning: JavaScript 1.6's for-each-in loops are deprecated [Translate]
    73. Warning: String.x is deprecated; use String.prototype.x instead [Translate]
    74. Warning: expression closures are deprecated [Translate]
    75. Warning: unreachable code after return statement [Translate]
    76. X.prototype.y called on incompatible type [Translate]
  14. Misc
    1. JavaScript technologies overview
    2. Lexical grammar
    3. JavaScript data structures
    4. Enumerability and ownership of properties
    5. Iteration protocols
    6. Strict mode
    7. Transitioning to strict mode
    8. Template literals
    9. Deprecated features
  15. New in JavaScript
    1. ECMAScript 2015 support in Mozilla
    2. ECMAScript 5 support in Mozilla
    3. ECMAScript Next support in Mozilla
    4. Firefox JavaScript changelog [Translate]
    5. New in JavaScript 1.1 [Translate]
    6. New in JavaScript 1.2 [Translate]
    7. New in JavaScript 1.3 [Translate]
    8. New in JavaScript 1.4 [Translate]
    9. New in JavaScript 1.5
    10. New in JavaScript 1.6
    11. New in JavaScript 1.7
    12. New in JavaScript 1.8
    13. New in JavaScript 1.8.1
    14. New in JavaScript 1.8.5
  16. Documentation:
  17. Useful lists
    1. All pages index
    2. Methods index
    3. Properties index
    4. Pages tagged "JavaScript"
  18. Contribute
    1. JavaScript doc status
    2. The MDN project