我有兴趣检索用户当前在 JavaScript 中为其操作系统设置的当前 zoneinfo 字符串（“America/Los Angeles”、“Europe/London”等）。我找到了如何以秒为单位获取当前偏移量、特定日期的偏移量以及不太精确的时区（PST 等），但不是 Olson zoneinfo。这可能吗？
Nick Dresselhaus
问问题
4538 次
5 回答
3
几个月前我研究了这个问题，结果是：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，它都会返回 Europe/Berlin。
基本上，它会检查夏令时转换发生时的已知日期。
希望它会有所帮助。
于 2011-08-21T19:08:24.247 回答
2
请参阅flegix.js 的 date.Date 插件。您可能可以只破解您需要的部分：
function getRegionForTimezone(tz) {
var exc = regionExceptions[tz];
if (exc) {
return exc;
}
else {
reg = tz.split('/')[0];
return regionMap[reg];
}
}
于 2009-03-03T22:22:36.900 回答
1
没有。对不起！您也许可以使用 TimeZone 通过 Java 小程序获得它，但从 JavaScript 中您所拥有的只是与 UTC 的偏移量。（从时区名称猜测是不可靠的，因为名称取决于语言环境。您可以通过匹配 UTC 偏移量来检测一些常见情况，但这可能需要大量工作。）
通常，如果您想将时区支持到像 Olson 一样细粒度的级别，您会为用户提供明确的可选择时区控制。
于 2009-03-03T22:20:40.163 回答
1
我使用 Jon Nylander 的超棒检测器（基于 Josh Fraser 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）使用歧义列表，并且 DST 开始时间与当地时间相同。我的脚本只有一个列表，所有日期都采用 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。“欧洲/赫尔辛基”
此脚本可以检测 90 个时区，但如果您需要更多时区，则必须使用 GeoLocation API 或一些服务器端库 (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存 2011 年的过渡数据，因此可能需要在未来的某一天进行一些调整。（我测试了 1970-80 的日期，结果在同一系统中的不同浏览器之间差异很大（！））但幸运的是 2011 年已经过去，世界上几乎所有的系统都希望更新他们的 tz-databases，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;
}
}
}
于 2012-10-01T23:18:07.007 回答
0
您必须在 Javascript 中设置 zoneinfo 数据的数组或散列，并根据您获取的时间确定名称。
于 2009-03-03T22:18:44.177 回答