我有兴趣检索当前用户在JavaScript中为其操作系统设置的当前zoneinfo字符串（“America / Los Angeles”，“Europe / London”等）。我已经找到了如何以秒为单位获得当前偏移，在特定日期获得偏移，以及不太准确的时区（PST等），但不是Olson zoneinfo。这可能吗？
答案 0 :(得分：3)
几个月前我就这个问题进行了研究，结果如下：http://site.pageloom.com/automatic-timezone-detection-with-javascript。该脚本不会为您提供最精确的结果。例如，无论您在中欧时区的哪个位置，它都将返回欧洲/柏林。
基本上所有它都会检查夏令时转换发生时的已知日期。
希望它会有所帮助。
答案 1 :(得分：2)
见fleegix.js's date.Date plugin。你可能只能破解parts you need：
function getRegionForTimezone(tz) {
var exc = regionExceptions[tz];
if (exc) {
return exc;
}
else {
reg = tz.split('/')[0];
return regionMap[reg];
}
}
答案 2 :(得分：1)
不。抱歉!您可以使用TimeZone通过Java小程序获取它，但是从JavaScript中获得的只是UTC的偏移量。 （从时区名称猜测是不可靠的，因为名称是与语言环境相关的。你可以通过匹配UTC偏移来检测一些常见情况，但这可能是很多工作。）
一般情况下，如果你想将时区支持到与Olson一样精细的级别，你就会给用户一个明确的可选时区控制。
答案 3 :(得分：1)
我使用Jon Nylander的超棒探测器（基于Josh Fraser编写的脚本，http://www.onlineaspect.com）的一些想法制作了一个更简单的脚本。 Nylander的脚本（以及它在https://github.com/scottwater/jquery.detect_timezone中的jQuery对应物）使用ambiquities列表，DST开始时间是当地时间。我的脚本只有一个列表，所有日期都是UTC，以便在需要时轻松添加或修改时区。
用法：
- 另存为.js并包含在html标题部分中
- 调用get_timezone_id（）并返回用户的时区，例如。 “欧/赫尔辛基”
此脚本可以检测90个时区，但如果需要更多，则必须使用GeoLocation API或某些服务器端库（geoIP）。根据目的，还可以考虑添加用户可选择的时区列表。
另请注意，由于我们不知道未来的浏览器和系统如何保留2011年的过渡数据，因此可能会在将来的某一天进行一些调整。 （我在1970-80测试了日期，并且在同一系统中浏览器的结果差别很大（！））但幸运的是，2011年已经过去了，世界上几乎所有的系统都希望更新他们的tz数据库并且检测应该是现在还不错。
/*
This script (Javascript Timezone Detection) detects Olson timezone
ID of user's system's timezone using getTimezoneOffset(). Detection
is tested and passed 100% in the following conditions:
* Windows 7,Opera 11.00
* Windows 7,Firefox 3.6.13
* Windows 7,Safari 5.0.3
* Windows 7,Google Chrome 8.0.552.237
* Windows 7,Internet Explorer 8.0.7600.16385
* Mac OS X,Google Chrome 8.0.552.237
* Mac OS X,Firefox 3.6.13
* Mac OS X,Opera 11.01
* Mac OS X,Safari Version 5.0.3
* Centos 5,Firefox 3.6.13
* Centos 5,Safari
* Centos 5,Opera 11.00
The script has ability to detect 90 timezones.
Every row in zones-array consist of
0: Olson timezone ID,
1-6: Transition start time in UTC (usually summer time start and sometimes winter time start)
7: Utc offset in minutes
8: 1 = has transition,0 = has not transition
Timezones are listed in zones-array this way:
- first comes section of timezones, that have transitions and then section of timezones that have no transitions
- Both sections are then ordered by offset
- Finally the has transitions section is ordered by the transition start time.
If you add more timezones or replaces some, please be sure to maintain this order, otherwise the detection fails in some cases.
Minified size: about 4.46KB
*/
var zones = new Array(
// FIRST DST TIMEZONES
[ 'Pacific/Apia', 2011,3,3,11,0,0, -660, 1 ]/* For Opera Linux. Unexpectedly winter-offset. */,
[ 'Pacific/Apia', 2010,8,26,11,0,0, -600, 1 ]/* STD: -660 */,
[ 'America/Adak', 2011,2,13,12,0,0, -540, 1 ]/* STD: -600 */,
[ 'America/Anchorage', 2011,2,13,11,0,0, -480, 1 ]/* STD: -540 */,
[ 'America/Los_Angeles', 2011,2,13,10,0,0, -420, 1 ]/* STD: -480 */,
[ 'America/Santa_Isabel', 2011,3,3,10,0,0, -420, 1 ]/* STD: -480 */,
[ 'America/Denver', 2011,2,13,9,0,0, -360, 1 ]/* STD: -420 */,
[ 'America/Mazatlan', 2011,3,3,9,0,0, -360, 1 ]/* STD: -420 */,
[ 'America/Chicago', 2011,2,13,8,0,0, -300, 1 ]/* STD: -360 */,
[ 'America/Mexico_City', 2011,3,3,8,0,0, -300, 1 ]/* STD: -360 */,
[ 'Pacific/Easter', 2011,9,9,4,0,0, -300, 1 ]/* STD: -360 */,
[ 'America/Havana', 2011,2,13,5,0,0, -240, 1 ]/* STD: -300 */,
[ 'America/New_York', 2011,2,13,7,0,0, -240, 1 ]/* STD: -300 */,
[ 'America/Goose_Bay', 2011,2,13,4,1,0, -180, 1 ]/* STD: -240 */,
[ 'America/Halifax', 2011,2,13,6,0,0, -180, 1 ]/* STD: -240 */,
[ 'Atlantic/Stanley', 2011,8,4,6,0,0, -180, 1 ]/* STD: -240 */,
[ 'America/Asuncion', 2011,9,2,4,0,0, -180, 1 ]/* STD: -240 */,
[ 'America/Santiago', 2011,9,9,4,0,0, -180, 1 ]/* STD: -240 */,
[ 'America/Campo_Grande', 2011,9,16,4,0,0, -180, 1 ]/* STD: -240 */,
[ 'America/St_Johns', 2011,2,13,3,31,0, -150, 1 ]/* STD: -210 */,
[ 'America/Miquelon', 2011,2,13,5,0,0, -120, 1 ]/* STD: -180 */,
[ 'America/Godthab', 2011,2,27,1,0,0, -120, 1 ]/* STD: -180 */,
[ 'America/Montevideo', 2011,9,2,5,0,0, -120, 1 ]/* STD: -180 */,
[ 'America/Sao_Paulo', 2011,9,16,3,0,0, -120, 1 ]/* STD: -180 */,
[ 'Atlantic/Azores', 2011,2,27,1,0,0, 0, 1 ]/* STD: -60 */,
[ 'Atlantic/Azores', 2010,2,28,3,0,0, 0, 1 ], /* Windows fix */
[ 'Europe/London', 2011,2,27,1,0,0, 60, 1 ]/* STD: 0 */,
[ 'Europe/Berlin', 2011,2,27,1,0,0, 120, 1 ]/* STD: 60 */,
[ 'Africa/Windhoek', 2011,8,4,1,0,0, 120, 1 ]/* STD: 60 */,
[ 'Asia/Gaza', 2011,2,25,22,1,0, 180, 1 ]/* STD: 120 */,
[ 'Asia/Beirut', 2011,2,26,22,0,0, 180, 1 ]/* STD: 120 */,
[ 'Europe/Minsk', 2011,2,27,0,0,0, 180, 1 ]/* STD: 120 */,
// Istanbul and Helsinki are the same, please select which one to use
// [ 'Europe/Istanbul', 2011,2,27,1,0,0, 180, 1 ]/* STD: 120 */,
[ 'Europe/Helsinki', 2011,2,27,1,0,0, 180, 1 ]/* STD: 120 */,
[ 'Asia/Jerusalem', 2011,3,1,0,0,0, 180, 1 ]/* STD: 120 */,
[ 'Africa/Cairo', 2011,3,28,22,0,0, 180, 1 ]/* STD: 120 */,
[ 'Asia/Damascus', 2011,9,27,21,0,0, 120, 1 ]/* Unexpectedly here winter-offset */,
[ 'Asia/Amman', 2011,9,27,22,0,0, 120, 1 ]/* Unexpectedly here winter-offset */,
[ 'Europe/Moscow', 2011,2,26,23,0,0, 240, 1 ]/* STD: 180 */,
[ 'Asia/Tehran', 2009,2,21,20,30,0, 270, 1 ]/* STD: 210 */,
[ 'Asia/Yerevan', 2011,2,26,22,0,0, 300, 1 ]/* STD: 240 */,
[ 'Asia/Baku', 2011,2,27,0,0,0, 300, 1 ]/* STD: 240 */,
[ 'Asia/Yekaterinburg', 2011,2,26,21,0,0, 360, 1 ]/* STD: 300 */,
[ 'Asia/Omsk', 2011,2,26,20,0,0, 420, 1 ]/* STD: 360 */,
[ 'Asia/Krasnoyarsk', 2011,2,26,19,0,0, 480, 1 ]/* STD: 420 */,
[ 'Asia/Irkutsk', 2011,2,26,18,0,0, 540, 1 ]/* STD: 480 */,
[ 'Asia/Yakutsk', 2011,2,26,17,0,0, 600, 1 ]/* STD: 540 */,
[ 'Australia/Adelaide', 2011,9,1,16,30,0, 630, 1 ]/* STD: 570 */,
[ 'Asia/Vladivostok', 2011,2,26,16,0,0, 660, 1 ]/* STD: 600 */,
[ 'Australia/Lord_Howe', 2011,9,1,15,30,0, 660, 1 ]/* STD: 630 */,
[ 'Australia/Sydney', 2011,9,1,16,0,0, 660, 1 ]/* STD: 600 */,
[ 'Pacific/Fiji', 2011,2,5,14,0,0, 720, 1 ]/* STD: 660 */,
[ 'Pacific/Fiji', 2011,2,26,14,0,0, 720, 1 ]/* STD: 660 */,
[ 'Asia/Kamchatka', 2011,2,26,15,0,0, 720, 1 ]/* STD: 660 */,
[ 'Pacific/Auckland', 2011,8,24,14,0,0, 780, 1 ]/* STD: 720 */,
[ 'Pacific/Chatham', 2011,8,24,14,0,0, 825, 1 ]/* STD: 765 */,
// AND THEN NON-DST TIMEZONES:
[ 'Etc/GMT+12', 2011,0,1,0,0,0, -720, 0 ]/* STD: -720 */,
[ 'Pacific/Pago_Pago', 2011,0,1,0,0,0, -660, 0 ]/* STD: -660 */,
[ 'Pacific/Kiritimati', 2010,0,1,0,0,0, 840, 0, '(LINT)' ], /* To prevent Firefox detecting Pacific/Kiritimati as Pacific Honolulu */
[ 'Pacific/Honolulu', 2011,0,1,0,0,0, -600, 0 ]/* STD: -600 */,
[ 'Pacific/Marquesas', 2011,0,1,0,0,0, -570, 0 ]/* STD: -570 */,
[ 'Pacific/Gambier', 2011,0,1,0,0,0, -540, 0 ]/* STD: -540 */,
[ 'Pacific/Pitcairn', 2011,0,1,0,0,0, -480, 0 ]/* STD: -480 */,
[ 'America/Phoenix', 2011,0,1,0,0,0, -420, 0 ]/* STD: -420 */,
[ 'America/Guatemala', 2011,0,1,0,0,0, -360, 0 ]/* STD: -360 */,
[ 'America/Bogota', 2011,0,1,0,0,0, -300, 0 ]/* STD: -300 */,
[ 'America/Caracas', 2011,0,1,0,0,0, -270, 0 ]/* STD: -270 */,
[ 'America/Santo_Domingo', 2011,0,1,0,0,0, -240, 0 ]/* STD: -240 */,
[ 'America/Argentina/Buenos_Aires', 2011,0,1,0,0,0, -180, 0 ]/* STD: -180 */,
[ 'America/Noronha', 2011,0,1,0,0,0, -120, 0 ]/* STD: -120 */,
[ 'Atlantic/Cape_Verde', 2011,0,1,0,0,0, -60, 0 ]/* STD: -60 */,
[ 'Africa/Casablanca', 2011,0,1,0,0,0, 0, 0 ]/* STD: 0 */,
[ 'Africa/Lagos', 2011,0,1,0,0,0, 60, 0 ]/* STD: 60 */,
[ 'Africa/Johannesburg', 2011,0,1,0,0,0, 120, 0 ]/* STD: 120 */,
[ 'Asia/Baghdad', 2011,0,1,0,0,0, 180, 0 ]/* STD: 180 */,
[ 'Asia/Dubai', 2011,0,1,0,0,0, 240, 0 ]/* STD: 240 */,
[ 'Asia/Kabul', 2011,0,1,0,0,0, 270, 0 ]/* STD: 270 */,
[ 'Asia/Karachi', 2011,0,1,0,0,0, 300, 0 ]/* STD: 300 */,
[ 'Asia/Kolkata', 2011,0,1,0,0,0, 330, 0 ]/* STD: 330 */,
[ 'Asia/Kathmandu', 2011,0,1,0,0,0, 345, 0 ]/* STD: 345 */,
[ 'Asia/Dhaka', 2011,0,1,0,0,0, 360, 0 ]/* STD: 360 */,
[ 'Asia/Rangoon', 2011,0,1,0,0,0, 390, 0 ]/* STD: 390 */,
[ 'Asia/Jakarta', 2011,0,1,0,0,0, 420, 0 ]/* STD: 420 */,
[ 'Asia/Shanghai', 2011,0,1,0,0,0, 480, 0 ]/* STD: 480 */,
[ 'Australia/Eucla', 2011,0,1,0,0,0, 525, 0 ]/* STD: 525 */,
[ 'Asia/Tokyo', 2011,0,1,0,0,0, 540, 0 ]/* STD: 540 */,
[ 'Australia/Darwin', 2011,0,1,0,0,0, 570, 0 ]/* STD: 570 */,
[ 'Australia/Brisbane', 2011,0,1,0,0,0, 600, 0 ]/* STD: 600 */,
[ 'Pacific/Noumea', 2011,0,1,0,0,0, 660, 0 ]/* STD: 660 */,
[ 'Pacific/Norfolk', 2011,0,1,0,0,0, 690, 0 ]/* STD: 690 */,
[ 'Pacific/Tarawa', 2011,0,1,0,0,0, 720, 0 ]/* STD: 720 */,
[ 'Pacific/Tongatapu', 2011,0,1,0,0,0, 780, 0 ]/* STD: 780 */,
[ 'Pacific/Kiritimati', 2011,0,1,0,0,0, 840, 0 ]/* STD: 840 */
)
function get_timezone_id()
{
var tz="";
for (var i in zones)
{
olson_name = zones[i][0];
has_transitions = zones[i][8];
date_1 = new Date(Date.UTC(zones[i][1],zones[i][2],zones[i][3],zones[i][4],zones[i][5],zones[i][6]));
date_1_offset_data = zones[i][7];
date_1_offset_user = -date_1.getTimezoneOffset();
date_2 = new Date(Date.UTC(zones[i][1],zones[i][2],zones[i][3],zones[i][4],zones[i][5],zones[i][6]) - 1000);
date_2_offset_user = -date_2.getTimezoneOffset();
var patt1=/\([^)]+\)/g;
if (zones[i][9] != undefined) var abbr = zones[i][9]; // To determine Pacific/Kiritimati in Firefox
else var abbr = "";
if
(
abbr == date_1.toString().match(patt1)
// Detect timezones that has transitions
|| (has_transitions && date_1_offset_user == date_1_offset_data && date_2_offset_user != date_1_offset_data)
// Detect timezones that has not transitions
|| (!has_transitions && date_1_offset_data == date_1_offset_user)
)
{
tz = olson_name;
return tz;
}
}
}
答案 4 :(得分：0)
您必须在Javascript中设置zoneinfo数据的数组或哈希值，并根据您选择的时间确定名称。