Date.prototype.valueOf()

valueOf() 함수는 Date 객체의 원시값을 반환합니다.

Syntax

dateObj.valueOf()

Return value

반환되는 milliseconds 값은 1 January 1970 00:00:00 UTC 와 주어진 일시 사이의 값입니다.

Description

valueOf() 함수는 01 January, 1970 UTC 이후의 milliseconds 단위의 자연수 타입인 Date 객체의 원시값을 반환합니다.

이 함수는 Date.prototype.getTime() 함수와 동일한 결과값을 반환합니다.

이 함수는 사용자 코드에 명시된 것이 아닌, JavaScript 자체에 포함되어 있습니다.

Examples

Using valueOf()

var x = new Date(56, 6, 17);
var myVar = x.valueOf();      // myVar에 -424713600000를 할당합니다.

Specifications

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard 최초 정의. JavaScript 1.1에서 구현
ECMAScript 5.1 (ECMA-262)
The definition of 'Date.prototype.valueOf' in that specification.		 Standard
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Date.prototype.valueOf' in that specification.		 Standard
ECMAScript (ECMA-262)
The definition of 'Date.prototype.valueOf' in that specification.		 Living Standard

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
valueOfChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100

Legend

Full support  
Full support

See also

관련 주제
  1. Standard built-in objects
  2. Date
  3. Methods
    1. Date.UTC()
    2. Date.now()
    3. Date.parse()
    4. Date.prototype.getDate()
    5. Date.prototype.getDay()
    6. Date.prototype.getFullYear()
    7. Date.prototype.getHours()
    8. Date.prototype.getMilliseconds()
    9. Date.prototype.getMinutes()
    10. Date.prototype.getMonth()
    11. Date.prototype.getSeconds()
    12. Date.prototype.getTime()
    13. Date.prototype.getTimezoneOffset()
    14. Date.prototype.getUTCDate()
    15. Date.prototype.getUTCDay()
    16. Date.prototype.getUTCFullYear()
    17. Date.prototype.getUTCHours()
    18. Date.prototype.getUTCMilliseconds()
    19. Date.prototype.getUTCMinutes()
    20. Date.prototype.getUTCMonth()
    21. Date.prototype.getUTCSeconds()
    22. Date.prototype.getYear() [Translate]
    23. Date.prototype.setDate()
    24. Date.prototype.setFullYear()
    25. Date.prototype.setHours()
    26. Date.prototype.setMilliseconds()
    27. Date.prototype.setMinutes()
    28. Date.prototype.setMonth()
    29. Date.prototype.setSeconds()
    30. Date.prototype.setTime()
    31. Date.prototype.setUTCDate()
    32. Date.prototype.setUTCFullYear()
    33. Date.prototype.setUTCHours()
    34. Date.prototype.setUTCMilliseconds()
    35. Date.prototype.setUTCMinutes()
    36. Date.prototype.setUTCMonth()
    37. Date.prototype.setUTCSeconds()
    38. Date.prototype.setYear() [Translate]
    39. Date.prototype.toDateString()
    40. Date.prototype.toGMTString() [Translate]
    41. Date.prototype.toISOString()
    42. Date.prototype.toJSON()
    43. Date.prototype.toLocaleDateString() [Translate]
    44. Date.prototype.toLocaleFormat() [Translate]
    45. Date.prototype.toLocaleString()
    46. Date.prototype.toLocaleTimeString() [Translate]
    47. Date.prototype.toSource() [Translate]
    48. Date.prototype.toString()
    49. Date.prototype.toTimeString() [Translate]
    50. Date.prototype.toUTCString() [Translate]
    51. Date.prototype.valueOf()
    52. Date.prototype[@@toPrimitive] [Translate]
  4. Inheritance:
  5. Function
  6. Properties
    1. Function.arguments
    2. Function.arity [Translate]
    3. Function.caller [Translate]
    4. Function.displayName [Translate]
    5. Function.length
    6. Function.name
  7. Methods
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator() [Translate]
    5. Function.prototype.toSource()
    6. Function.prototype.toString() [Translate]
  8. Object
  9. Properties
    1. Object.prototype.__count__ [Translate]
    2. Object.prototype.__noSuchMethod__ [Translate]
    3. Object.prototype.__parent__ [Translate]
    4. Object.prototype.__proto__ [Translate]
    5. Object.prototype.constructor
  10. Methods
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__() [Translate]
    3. Object.prototype.__lookupGetter__() [Translate]
    4. Object.prototype.__lookupSetter__() [Translate]
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource() [Translate]
    10. Object.prototype.toString()
    11. Object.prototype.unwatch() [Translate]
    12. Object.prototype.valueOf()
    13. Object.prototype.watch() [Translate]
    14. Object.setPrototypeOf()