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Date.prototype.getYear()

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已废弃
该特性已经从 Web 标准中删除,虽然一些浏览器目前仍然支持它,但也许会在未来的某个时间停止支持,请尽量不要使用该特性。

Summary

The getYear() method returns the year in the specified date according to local time. Because getYear does not return full years ("year 2000 problem"), it is no longer used and has been replaced by the getFullYear method.

Syntax

dateObj.getYear() 

Parameters

None.

Returns

The getYear method returns the year minus 1900; thus:

  • For years greater than or equal to 2000, the value returned by getYear is 100 or greater. For example, if the year is 2026, getYear returns 126.
  • For years between and including 1900 and 1999, the value returned by getYear is between 0 and 99. For example, if the year is 1976, getYear returns 76.
  • For years less than 1900, the value returned by getYear is less than 0. For example, if the year is 1800, getYear returns -100.

To take into account years before and after 2000, you should use getFullYear() instead of getYear so that the year is specified in full.

Backward Compatibility

Behaviour in JavaScript 1.2 and earlier

The getYear method returns either a 2-digit or 4-digit year:

  • For years between and including 1900 and 1999, the value returned by getYear is the year minus 1900. For example, if the year is 1976, the value returned is 76.
  • For years less than 1900 or greater than 1999, the value returned by getYear is the four-digit year. For example, if the year is 1856, the value returned is 1856. If the year is 2026, the value returned is 2026.

Examples

Example: Years between 1900 and 1999

The second statement assigns the value 95 to the variable year.

var Xmas = new Date("December 25, 1995 23:15:00");
var year = Xmas.getYear(); // returns 95

Example: Years above 1999

The second statement assigns the value 100 to the variable year.

var Xmas = new Date("December 25, 2000 23:15:00");
var year = Xmas.getYear(); // returns 100

Example: Years below 1900

The second statement assigns the value -100 to the variable year.

var Xmas = new Date("December 25, 1800 23:15:00");
var year = Xmas.getYear(); // returns -100

Example: Setting and getting a year between 1900 and 1999

The second statement assigns the value 95 to the variable year, representing the year 1995.

var Xmas.setYear(95);
var year = Xmas.getYear(); // returns 95 

Specifications

Specification Status Comment
ECMAScript 1st Edition. Implemented in JavaScript 1.0 Standard Initial definition.
ECMAScript 5.1 (ECMA-262)
Date.prototype.getYear
Standard Defined in the (informative) compatibility annex.
ECMAScript 6 (ECMA-262)
Date.prototype.getYear
Release Candidate Defined in the (normative) annex for additional features for web browsers.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

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