mirror of https://github.com/therootcompany/tz.js
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*.min.js
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{
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"printWidth": 80,
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"tabWidth": 2,
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}
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74
README.md
74
README.md
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@ -1,8 +1,7 @@
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# [xtz.js](https://github.com/therootcompany/tz.js)
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A fast, lightweight, zero-dependency library to
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translate between Time Zones and UTC with native
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`Intl.DateTimeFormat` in ~100 LoC. For Node.js & Browsers.
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A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native `Intl.DateTimeFormat`
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in ~100 LoC. For Node.js & Browsers.
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XTZ is a poor man's Temporal polyfill, but just for time zones.
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@ -50,14 +49,14 @@ utcDate.toISOString();
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# Features
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- [x] Translate a UTC time to a Time Zone
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- [x] Translate a Zoned time to UTC
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- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
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- [x] Well-tested `npm run test`
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- [x] Lightweight (No deps)
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- 5kb Source + Comments
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- 2.5kb Minified
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- <1kb `gzip`d
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- [x] Translate a UTC time to a Time Zone
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- [x] Translate a Zoned time to UTC
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- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
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- [x] Well-tested `npm run test`
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- [x] Lightweight (No deps)
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- 5kb Source + Comments
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- 2.5kb Minified
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- <1kb `gzip`d
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Compatible with Browsers, and Node.js.
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@ -83,10 +82,10 @@ var TZ = require("xtz");
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# API
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- `toTimeZone(utcDate, timeZone)`
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- `toTimeZoneISOString(isoString, timeZone)`
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- `toUTC(dtString, timeZone)`
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- `toUTCISOString(dtString, timeZone)`
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- `toTimeZone(utcDate, timeZone)`
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- `toTimeZoneISOString(isoString, timeZone)`
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- `toUTC(dtString, timeZone)`
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- `toUTCISOString(dtString, timeZone)`
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## `toTimeZone(utcDate, timeZone)`
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@ -115,8 +114,8 @@ You can also use a date object with an absolute UTC time:
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```js
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var tzDate = TZ.toTimeZone(
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new Date("2021-11-07T08:15:59.000Z"),
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"America/New_York"
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new Date("2021-11-07T08:15:59.000Z"),
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"America/New_York"
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);
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```
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@ -155,12 +154,13 @@ Or our bespoke date object:
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var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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```
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You can also use a date object as the source time, but the date's UTC time will be treated as **_relative to time zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support).
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You can also use a date object as the source time, but the date's UTC time will be treated as **_relative to time
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zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support).
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```js
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var utcDate = TZ.toUTC(
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new Date("2021-11-07T03:15:59.000Z"),
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"America/New_York"
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new Date("2021-11-07T03:15:59.000Z"),
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"America/New_York"
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);
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```
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@ -173,30 +173,32 @@ utcDate.toISOString();
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> In 2021 Daylight Savings (in the US)
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>
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> - begins at 2am on March 14th
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> - ends at 2am on November 7th
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> - begins at 2am on March 14th
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> - ends at 2am on November 7th
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>
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> See <https://www.timeanddate.com/time/change/usa>.
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Q: What happens in March when 2am is skipped?
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- A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which is an hour early in real ("tick-tock" or "monotonic") time.
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```js
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var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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utcDate.toISOString();
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// "2021-03-14T02:15:59.000-0400"
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// (same as "2021-03-14T01:15:59.000-0500")
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```
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- A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which
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is an hour early in real ("tick-tock" or "monotonic") time.
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```js
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var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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utcDate.toISOString();
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// "2021-03-14T02:15:59.000-0400"
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// (same as "2021-03-14T01:15:59.000-0500")
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```
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Q: What happens in November when 2am happens twice?
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- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time with this library.
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```js
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var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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utcDate.toISOString();
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// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
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// (an hour before the 2nd 2am at "2021-11-07T01:15:59.000-0500")
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```
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- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time
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with this library.
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```js
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var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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utcDate.toISOString();
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// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
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// (an hour before the 2nd 2am at "2021-11-07T01:15:59.000-0500")
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```
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# List of Time Zones
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142
examples.js
142
examples.js
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@ -1,89 +1,81 @@
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var XTZ;
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(function () {
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"use strict";
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"use strict";
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if (!XTZ) {
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try {
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XTZ = require("xtz");
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} catch (e) {
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XTZ = require("./xtz.js");
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}
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if (!XTZ) {
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try {
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XTZ = require("xtz");
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} catch (e) {
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XTZ = require("./xtz.js");
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}
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}
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var TZ = XTZ;
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var tzDate;
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var TZ = XTZ;
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var tzDate;
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//
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// UTC-absolute time translated to a Time Zone
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//
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function demo1() {
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console.info("What's the UTC equivalent of 8:15am in New York?");
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console.info();
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//
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// UTC-absolute time translated to a Time Zone
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//
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function demo1() {
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console.info("What's the UTC equivalent of 8:15am in New York?");
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console.info();
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console.info("\t// during daylight savings");
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console.info(
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`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`
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);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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console.info("\t// during daylight savings");
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console.info(`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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console.info("\t// during standard time");
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console.info(
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`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`
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);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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}
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console.info("\t// during standard time");
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console.info(`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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}
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//
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// Time Zone-relative time translated to UTC
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//
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function demo2() {
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console.info(
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"What time is it in New York at 8:15am on March 14th UTC?"
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);
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console.info();
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//
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// Time Zone-relative time translated to UTC
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//
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function demo2() {
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console.info("What time is it in New York at 8:15am on March 14th UTC?");
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console.info();
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console.info("\t// during daylight savings");
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console.info(
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`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
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);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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console.info("\t// during daylight savings");
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console.info(
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`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
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);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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console.info("\t// during standard time");
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console.info(
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`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`
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);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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}
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console.info("\t// during standard time");
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console.info(`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`);
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console.info(`\ttzDate.toISOString()`);
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tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
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console.info(
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"\t" + tzDate.toISOString(),
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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);
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console.info();
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}
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demo1();
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demo2();
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demo1();
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demo2();
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})();
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556
test.js
556
test.js
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@ -3,314 +3,314 @@
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var TZ = require("./");
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function testUtcToTz(t) {
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var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
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if (t.result !== result) {
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throw new Error(
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`Invalid UTC to TZ conversion for ${t.desc}:\n` +
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`\tExpected: ${t.result}\n` +
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`\tActual: ${result}\n`
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);
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}
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var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
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if (t.result !== result) {
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throw new Error(
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`Invalid UTC to TZ conversion for ${t.desc}:\n` +
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`\tExpected: ${t.result}\n` +
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`\tActual: ${result}\n`
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);
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}
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}
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function testTzToUtc(t) {
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var result = TZ.toUTC.apply(TZ, t.inputs);
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if (t.result !== result.toISOString()) {
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console.log(result);
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throw new Error(
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`Invalid TZ to UTC conversion for ${t.desc}:\n` +
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`\tExpected: ${t.result}\n` +
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`\tActual: ${result.toISOString()}\n`
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);
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}
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var result = TZ.toUTC.apply(TZ, t.inputs);
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if (t.result !== result.toISOString()) {
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console.log(result);
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throw new Error(
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`Invalid TZ to UTC conversion for ${t.desc}:\n` +
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`\tExpected: ${t.result}\n` +
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`\tActual: ${result.toISOString()}\n`
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);
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}
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}
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// At this real UTC time, what does the timezone translate it to?
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[
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//
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// Start-of-DST Tests
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//
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//
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// Start-of-DST Tests
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//
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// [Start]
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// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
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// // 2021-03-14T01:15:59.000-0500
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// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
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// // 2021-03-14T03:15:59.000-0400
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// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
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// // 2021-03-14T03:15:59.000-0400
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// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
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// // 2021-03-14T04:15:59.000-0400
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// [End]
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||||
// [Start]
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// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
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// // 2021-03-14T01:15:59.000-0500
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// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
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// // 2021-03-14T03:15:59.000-0400
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// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
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// // 2021-03-14T03:15:59.000-0400
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// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
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// // 2021-03-14T04:15:59.000-0400
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// [End]
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// 12:15am NY -0500 => -0400
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{
|
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desc: "UTC to 12:15am NY EST",
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inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
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result: "2021-03-14T00:15:59.000-0500",
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},
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||||
{
|
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desc: "UTC to 12:15am NY EST (2)",
|
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inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
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result: "2021-03-14T00:15:59.000-0500",
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},
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// 1:15am NY (non-DST)
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{
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desc: "UTC to 1:15am NY EST",
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inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
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result: "2021-03-14T01:15:59.000-0500",
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},
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{
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desc: "UTC to 1:15am NY EST (2)",
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inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
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result: "2021-03-14T01:15:59.000-0500",
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},
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// 12:15am NY -0500 => -0400
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{
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desc: "UTC to 12:15am NY EST",
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inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
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||||
result: "2021-03-14T00:15:59.000-0500",
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||||
},
|
||||
{
|
||||
desc: "UTC to 12:15am NY EST (2)",
|
||||
inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-03-14T00:15:59.000-0500",
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||||
},
|
||||
// 1:15am NY (non-DST)
|
||||
{
|
||||
desc: "UTC to 1:15am NY EST",
|
||||
inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
|
||||
result: "2021-03-14T01:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 1:15am NY EST (2)",
|
||||
inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-03-14T01:15:59.000-0500",
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||||
},
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||||
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||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
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||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
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||||
|
||||
// 3:15am NY (DST)
|
||||
{
|
||||
desc: "UTC to 3:15am NY EDT",
|
||||
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 3:15am NY EDT (2)",
|
||||
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
// 4:15am NY
|
||||
{
|
||||
desc: "UTC to 4:15am NY EDT",
|
||||
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 4:15am NY EDT (2)",
|
||||
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
// 3:15am NY (DST)
|
||||
{
|
||||
desc: "UTC to 3:15am NY EDT",
|
||||
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 3:15am NY EDT (2)",
|
||||
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
// 4:15am NY
|
||||
{
|
||||
desc: "UTC to 4:15am NY EDT",
|
||||
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 4:15am NY EDT (2)",
|
||||
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
|
||||
//
|
||||
// End-of-DST Tests
|
||||
//
|
||||
//
|
||||
// End-of-DST Tests
|
||||
//
|
||||
|
||||
// [Start]
|
||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0400
|
||||
// // 2021-11-07 06:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0500
|
||||
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
|
||||
// // 2021-11-07T02:15:59.000-0500
|
||||
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||
// [End]
|
||||
// [Start]
|
||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0400
|
||||
// // 2021-11-07 06:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0500
|
||||
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
|
||||
// // 2021-11-07T02:15:59.000-0500
|
||||
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||
// [End]
|
||||
|
||||
// 12:15am NY -0400 => -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
|
||||
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
|
||||
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
// 1:15am NY (DST) -0400
|
||||
// NOTE: 1:15am happens TWICE (with different offsets)
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
|
||||
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
|
||||
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400",
|
||||
},
|
||||
// 1:15am NY (non-DST) -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST",
|
||||
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0500",
|
||||
},
|
||||
// 2:15am NY -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST",
|
||||
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
// 3:15am NY
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST",
|
||||
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
// 12:15am NY -0400 => -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
|
||||
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
|
||||
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
// 1:15am NY (DST) -0400
|
||||
// NOTE: 1:15am happens TWICE (with different offsets)
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
|
||||
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
|
||||
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400",
|
||||
},
|
||||
// 1:15am NY (non-DST) -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST",
|
||||
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0500",
|
||||
},
|
||||
// 2:15am NY -0500
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST",
|
||||
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
// 3:15am NY
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST",
|
||||
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
{
|
||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
|
||||
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
|
||||
//
|
||||
// Positive Offset Test
|
||||
//
|
||||
//
|
||||
// Positive Offset Test
|
||||
//
|
||||
|
||||
// Colombo +0530 (not DST)
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (1)",
|
||||
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (2)",
|
||||
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (3)",
|
||||
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (4)",
|
||||
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
// Colombo +0530 (not DST)
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (1)",
|
||||
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (2)",
|
||||
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (3)",
|
||||
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
desc: "UTC to Asia/Colombo (4)",
|
||||
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
].forEach(testUtcToTz);
|
||||
console.info("Pass: UTC to TZ for America/New_York and Asia/Colombo");
|
||||
|
||||
[
|
||||
//
|
||||
// Start-of-DST Tests
|
||||
//
|
||||
//
|
||||
// Start-of-DST Tests
|
||||
//
|
||||
|
||||
// [Start]
|
||||
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
|
||||
// // 2021-03-14T01:15:59.000-0500
|
||||
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
|
||||
// // 2021-03-14T03:15:59.000-0400
|
||||
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
|
||||
// // 2021-03-14T03:15:59.000-0400
|
||||
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
|
||||
// // 2021-03-14T04:15:59.000-0400
|
||||
// [End]
|
||||
// [Start]
|
||||
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
|
||||
// // 2021-03-14T01:15:59.000-0500
|
||||
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
|
||||
// // 2021-03-14T03:15:59.000-0400
|
||||
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
|
||||
// // 2021-03-14T03:15:59.000-0400
|
||||
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
|
||||
// // 2021-03-14T04:15:59.000-0400
|
||||
// [End]
|
||||
|
||||
// 12:15am NY -0500 => -0400
|
||||
{
|
||||
// 2021-03-14T05:15:59.000Z
|
||||
desc: "2021 Mar 14, 12:15am NY EST to UTC",
|
||||
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T00:15:59.000-0500",
|
||||
},
|
||||
// 1:15am NY (non-DST)
|
||||
{
|
||||
// 2021-03-14T06:15:59.000Z
|
||||
desc: "2021 Mar 14, 1:15am NY EST to UTC",
|
||||
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T01:15:59.000-0500",
|
||||
},
|
||||
// 12:15am NY -0500 => -0400
|
||||
{
|
||||
// 2021-03-14T05:15:59.000Z
|
||||
desc: "2021 Mar 14, 12:15am NY EST to UTC",
|
||||
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T00:15:59.000-0500",
|
||||
},
|
||||
// 1:15am NY (non-DST)
|
||||
{
|
||||
// 2021-03-14T06:15:59.000Z
|
||||
desc: "2021 Mar 14, 1:15am NY EST to UTC",
|
||||
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T01:15:59.000-0500",
|
||||
},
|
||||
|
||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
||||
// This test is here to document the "undefined" behavior
|
||||
{
|
||||
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
|
||||
// would be reasonable substitutions, I think
|
||||
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
|
||||
inputs: ["2021-03-14 02:15:59.000", "America/New_York"],
|
||||
//result: "2021-03-14T01:15:59.000-0500", // 2021-03-14T06:15:59.000Z
|
||||
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
|
||||
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
|
||||
},
|
||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
||||
// This test is here to document the "undefined" behavior
|
||||
{
|
||||
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
|
||||
// would be reasonable substitutions, I think
|
||||
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
|
||||
inputs: ["2021-03-14 02:15:59.000", "America/New_York"],
|
||||
//result: "2021-03-14T01:15:59.000-0500", // 2021-03-14T06:15:59.000Z
|
||||
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
|
||||
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
|
||||
},
|
||||
|
||||
// 3:15am NY (DST)
|
||||
{
|
||||
// 2021-03-14T07:15:59.000Z
|
||||
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
|
||||
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
// 4:15am NY
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
|
||||
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
// 3:15am NY (DST)
|
||||
{
|
||||
// 2021-03-14T07:15:59.000Z
|
||||
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
|
||||
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T03:15:59.000-0400",
|
||||
},
|
||||
// 4:15am NY
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
|
||||
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
|
||||
result: "2021-03-14T04:15:59.000-0400",
|
||||
},
|
||||
|
||||
//
|
||||
// End-of-DST Tests
|
||||
//
|
||||
//
|
||||
// End-of-DST Tests
|
||||
//
|
||||
|
||||
// [Start]
|
||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0400
|
||||
// // 2021-11-07 06:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0500
|
||||
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
|
||||
// // 2021-11-07T02:15:59.000-0500
|
||||
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||
// [End]
|
||||
// [Start]
|
||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0400
|
||||
// // 2021-11-07 06:15:59.000
|
||||
// // 2021-11-07T01:15:59.000-0500
|
||||
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
|
||||
// // 2021-11-07T02:15:59.000-0500
|
||||
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||
// [End]
|
||||
|
||||
// 12:15am NY -0400 => -0500
|
||||
{
|
||||
// 2021-11-07T04:15:59.000Z
|
||||
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
|
||||
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
// 12:15am NY -0400 => -0500
|
||||
{
|
||||
// 2021-11-07T04:15:59.000Z
|
||||
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
|
||||
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T00:15:59.000-0400",
|
||||
},
|
||||
|
||||
// 1:15am NY (DST) -0400
|
||||
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
|
||||
{
|
||||
// ==> 2021-11-07T05:15:59.000Z
|
||||
// [Skip] 2021-11-07T06:15:59.000Z
|
||||
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
|
||||
inputs: ["2021-11-07 01:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400", // 2021-11-07T05:15:59.000Z
|
||||
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
|
||||
},
|
||||
// 1:15am NY (DST) -0400
|
||||
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
|
||||
{
|
||||
// ==> 2021-11-07T05:15:59.000Z
|
||||
// [Skip] 2021-11-07T06:15:59.000Z
|
||||
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
|
||||
inputs: ["2021-11-07 01:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T01:15:59.000-0400", // 2021-11-07T05:15:59.000Z
|
||||
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
|
||||
},
|
||||
|
||||
// 2:15am NY -0500
|
||||
{
|
||||
// 2021-11-07T07:15:59.000Z
|
||||
desc: "2021 Nov 7, 2:15am NY EST to UTC",
|
||||
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
// 3:15am NY
|
||||
{
|
||||
// 2021-11-07T08:15:59.000Z
|
||||
desc: "2021 Nov 7, 3:15am NY EST to UTC",
|
||||
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
// 2:15am NY -0500
|
||||
{
|
||||
// 2021-11-07T07:15:59.000Z
|
||||
desc: "2021 Nov 7, 2:15am NY EST to UTC",
|
||||
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T02:15:59.000-0500",
|
||||
},
|
||||
// 3:15am NY
|
||||
{
|
||||
// 2021-11-07T08:15:59.000Z
|
||||
desc: "2021 Nov 7, 3:15am NY EST to UTC",
|
||||
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
|
||||
result: "2021-11-07T03:15:59.000-0500",
|
||||
},
|
||||
|
||||
//
|
||||
// Positive Offset Test
|
||||
//
|
||||
//
|
||||
// Positive Offset Test
|
||||
//
|
||||
|
||||
// Colombo +0530 (not DST)
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "Asia/Colombo to UTC (1)",
|
||||
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "Asia/Colombo to UTC (2)",
|
||||
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
// Colombo +0530 (not DST)
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "Asia/Colombo to UTC (1)",
|
||||
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
|
||||
result: "2021-03-14T13:45:59.000+0530",
|
||||
},
|
||||
{
|
||||
// 2021-03-14T08:15:59.000Z
|
||||
desc: "Asia/Colombo to UTC (2)",
|
||||
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
|
||||
result: "2021-11-07T13:45:59.000+0530",
|
||||
},
|
||||
].forEach(testTzToUtc);
|
||||
console.info("Pass: TZ to UTC for America/New_York and Asia/Colombo");
|
||||
|
|
|
|||
347
xtz.js
347
xtz.js
|
|
@ -1,182 +1,179 @@
|
|||
var XTZ;
|
||||
|
||||
(function () {
|
||||
"use strict";
|
||||
"use strict";
|
||||
|
||||
function toTimeZone(date, timeZone) {
|
||||
// ISO string or existing date object
|
||||
date = new Date(date);
|
||||
var options = {
|
||||
timeZone: timeZone,
|
||||
year: "numeric",
|
||||
month: "numeric",
|
||||
day: "numeric",
|
||||
hour12: false,
|
||||
hour: "numeric",
|
||||
minute: "numeric",
|
||||
second: "numeric",
|
||||
fractionalSecondDigits: 3,
|
||||
};
|
||||
|
||||
var tzOptions = Object.assign({ timeZoneName: "long" }, options);
|
||||
|
||||
// Every country uses the same year and months, right?
|
||||
var formater = new Intl.DateTimeFormat("default", tzOptions);
|
||||
var parts = formater.formatToParts(date);
|
||||
|
||||
var whole = {};
|
||||
parts.forEach(function (part) {
|
||||
var val = part.value;
|
||||
switch (part.type) {
|
||||
case "literal":
|
||||
// ignore separators and whitespace characters
|
||||
return;
|
||||
case "timeZoneName":
|
||||
// keep as is - it's a string
|
||||
break;
|
||||
case "month":
|
||||
// months are 0-indexed for new Date()
|
||||
val = parseInt(val, 10) - 1;
|
||||
break;
|
||||
case "hour":
|
||||
// because sometimes 24 is used instead of 0, make 24 0
|
||||
val = parseInt(val, 10) % 24;
|
||||
break;
|
||||
case "fractionalSecond":
|
||||
// fractionalSecond is a dumb name - should be millisecond
|
||||
whole.millisecond = parseInt(val, 10);
|
||||
return;
|
||||
default:
|
||||
val = parseInt(val, 10);
|
||||
}
|
||||
// whole.month = 0;
|
||||
whole[part.type] = val;
|
||||
});
|
||||
|
||||
whole.timeZone = timeZone;
|
||||
whole.offset = getOffset(date, whole);
|
||||
whole.toISOString = _toOffsetISOString;
|
||||
return whole;
|
||||
}
|
||||
|
||||
function toTimeZoneISOString(date, timeZone) {
|
||||
var whole = toTimeZone(date, timeZone);
|
||||
return toOffsetISOString(whole);
|
||||
}
|
||||
|
||||
function _toOffsetISOString() {
|
||||
return toOffsetISOString(this);
|
||||
}
|
||||
|
||||
function getOffset(utcDate, tzD2) {
|
||||
var tzDate = new Date(toOffsetISOString(tzD2));
|
||||
var diff =
|
||||
Math.round(tzDate.valueOf() - utcDate.valueOf()) / (60 * 1000);
|
||||
return diff;
|
||||
}
|
||||
|
||||
function p2(x) {
|
||||
return String(x).padStart(2, "0");
|
||||
}
|
||||
|
||||
function p3(x) {
|
||||
return String(x).padStart(3, "0");
|
||||
}
|
||||
|
||||
function formatOffset(minutes) {
|
||||
if (!minutes) {
|
||||
return "Z";
|
||||
}
|
||||
|
||||
var h = Math.floor(Math.abs(minutes) / 60);
|
||||
var m = Math.abs(minutes) % 60;
|
||||
var offset = "";
|
||||
if (minutes > 0) {
|
||||
offset = "+";
|
||||
} else if (minutes < 0) {
|
||||
offset = "-";
|
||||
}
|
||||
|
||||
// +0500, -0730
|
||||
return (
|
||||
offset +
|
||||
h.toString().padStart(2, "0") +
|
||||
m.toString().padStart(2, "0")
|
||||
);
|
||||
}
|
||||
|
||||
function toOffsetISOString(d) {
|
||||
var offset = formatOffset(d.offset);
|
||||
return (
|
||||
`${d.year}-${p2(d.month + 1)}-${p2(d.day)}` +
|
||||
`T${p2(d.hour)}:${p2(d.minute)}:${p2(d.second)}.${p3(
|
||||
d.millisecond
|
||||
)}${offset}`
|
||||
);
|
||||
}
|
||||
|
||||
function toUTC(dt, tz) {
|
||||
if ("string" === typeof dt) {
|
||||
// Either of these formats should work:
|
||||
// 2021-03-14 01:15:59
|
||||
// 2021-03-14T01:15:59Z
|
||||
dt = dt
|
||||
.replace("T", " ")
|
||||
.replace("Z", "")
|
||||
.replace(" ", "T")
|
||||
.replace(/$/, "Z");
|
||||
}
|
||||
var utcDate = new Date(dt);
|
||||
var tzD2 = toTimeZone(utcDate, tz);
|
||||
var offset = tzD2.offset;
|
||||
tzD2.offset = "";
|
||||
|
||||
var deltaDate = new Date(utcDate);
|
||||
deltaDate.setUTCMinutes(deltaDate.getUTCMinutes() - offset);
|
||||
var tzD3 = toTimeZone(deltaDate, tz);
|
||||
|
||||
if (
|
||||
tzD3.hour === utcDate.getUTCHours() &&
|
||||
tzD3.minute === utcDate.getUTCMinutes()
|
||||
) {
|
||||
return tzD3;
|
||||
}
|
||||
|
||||
var diff = tzD3.offset - offset;
|
||||
var h = Math.floor(Math.abs(diff) / 60);
|
||||
var m = Math.abs(diff) % 60;
|
||||
var sign = Math.abs(diff) / diff;
|
||||
tzD3.hour -= h * sign;
|
||||
tzD3.minute -= m * sign;
|
||||
|
||||
return tzD3;
|
||||
}
|
||||
|
||||
function toUTCISOString(date, timeZone) {
|
||||
var whole = toUTC(date, timeZone);
|
||||
return toOffsetISOString(whole);
|
||||
}
|
||||
|
||||
XTZ = {
|
||||
// bespoke date =>
|
||||
// 2021-11-07T3:15:59-0500
|
||||
toOffsetISOString: toOffsetISOString,
|
||||
|
||||
// -240 => -0400
|
||||
formatOffset: formatOffset,
|
||||
|
||||
// [ "2021-11-07T08:15:59Z", "America/New_York" ]
|
||||
// => "2021-11-07T03:15:59-0500" // 2021-11-07 03:15:59
|
||||
toTimeZone: toTimeZone,
|
||||
toTimeZoneISOString: toTimeZoneISOString,
|
||||
|
||||
// [ "2021-11-07 03:15:59", "America/New_York" ]
|
||||
// => "2021-11-07T03:15:59-0500" // 2021-11-07T08:15:59Z
|
||||
toUTC: toUTC,
|
||||
toUTCISOString: toUTCISOString,
|
||||
function toTimeZone(date, timeZone) {
|
||||
// ISO string or existing date object
|
||||
date = new Date(date);
|
||||
var options = {
|
||||
timeZone: timeZone,
|
||||
year: "numeric",
|
||||
month: "numeric",
|
||||
day: "numeric",
|
||||
hour12: false,
|
||||
hour: "numeric",
|
||||
minute: "numeric",
|
||||
second: "numeric",
|
||||
fractionalSecondDigits: 3,
|
||||
};
|
||||
|
||||
if ("undefined" != typeof module && module.exports) {
|
||||
module.exports = XTZ;
|
||||
var tzOptions = Object.assign({ timeZoneName: "long" }, options);
|
||||
|
||||
// Every country uses the same year and months, right?
|
||||
var formater = new Intl.DateTimeFormat("default", tzOptions);
|
||||
var parts = formater.formatToParts(date);
|
||||
|
||||
var whole = {};
|
||||
parts.forEach(function (part) {
|
||||
var val = part.value;
|
||||
switch (part.type) {
|
||||
case "literal":
|
||||
// ignore separators and whitespace characters
|
||||
return;
|
||||
case "timeZoneName":
|
||||
// keep as is - it's a string
|
||||
break;
|
||||
case "month":
|
||||
// months are 0-indexed for new Date()
|
||||
val = parseInt(val, 10) - 1;
|
||||
break;
|
||||
case "hour":
|
||||
// because sometimes 24 is used instead of 0, make 24 0
|
||||
val = parseInt(val, 10) % 24;
|
||||
break;
|
||||
case "fractionalSecond":
|
||||
// fractionalSecond is a dumb name - should be millisecond
|
||||
whole.millisecond = parseInt(val, 10);
|
||||
return;
|
||||
default:
|
||||
val = parseInt(val, 10);
|
||||
}
|
||||
// whole.month = 0;
|
||||
whole[part.type] = val;
|
||||
});
|
||||
|
||||
whole.timeZone = timeZone;
|
||||
whole.offset = getOffset(date, whole);
|
||||
whole.toISOString = _toOffsetISOString;
|
||||
return whole;
|
||||
}
|
||||
|
||||
function toTimeZoneISOString(date, timeZone) {
|
||||
var whole = toTimeZone(date, timeZone);
|
||||
return toOffsetISOString(whole);
|
||||
}
|
||||
|
||||
function _toOffsetISOString() {
|
||||
return toOffsetISOString(this);
|
||||
}
|
||||
|
||||
function getOffset(utcDate, tzD2) {
|
||||
var tzDate = new Date(toOffsetISOString(tzD2));
|
||||
var diff = Math.round(tzDate.valueOf() - utcDate.valueOf()) / (60 * 1000);
|
||||
return diff;
|
||||
}
|
||||
|
||||
function p2(x) {
|
||||
return String(x).padStart(2, "0");
|
||||
}
|
||||
|
||||
function p3(x) {
|
||||
return String(x).padStart(3, "0");
|
||||
}
|
||||
|
||||
function formatOffset(minutes) {
|
||||
if (!minutes) {
|
||||
return "Z";
|
||||
}
|
||||
}());
|
||||
|
||||
var h = Math.floor(Math.abs(minutes) / 60);
|
||||
var m = Math.abs(minutes) % 60;
|
||||
var offset = "";
|
||||
if (minutes > 0) {
|
||||
offset = "+";
|
||||
} else if (minutes < 0) {
|
||||
offset = "-";
|
||||
}
|
||||
|
||||
// +0500, -0730
|
||||
return (
|
||||
offset + h.toString().padStart(2, "0") + m.toString().padStart(2, "0")
|
||||
);
|
||||
}
|
||||
|
||||
function toOffsetISOString(d) {
|
||||
var offset = formatOffset(d.offset);
|
||||
return (
|
||||
`${d.year}-${p2(d.month + 1)}-${p2(d.day)}` +
|
||||
`T${p2(d.hour)}:${p2(d.minute)}:${p2(d.second)}.${p3(
|
||||
d.millisecond
|
||||
)}${offset}`
|
||||
);
|
||||
}
|
||||
|
||||
function toUTC(dt, tz) {
|
||||
if ("string" === typeof dt) {
|
||||
// Either of these formats should work:
|
||||
// 2021-03-14 01:15:59
|
||||
// 2021-03-14T01:15:59Z
|
||||
dt = dt
|
||||
.replace("T", " ")
|
||||
.replace("Z", "")
|
||||
.replace(" ", "T")
|
||||
.replace(/$/, "Z");
|
||||
}
|
||||
var utcDate = new Date(dt);
|
||||
var tzD2 = toTimeZone(utcDate, tz);
|
||||
var offset = tzD2.offset;
|
||||
tzD2.offset = "";
|
||||
|
||||
var deltaDate = new Date(utcDate);
|
||||
deltaDate.setUTCMinutes(deltaDate.getUTCMinutes() - offset);
|
||||
var tzD3 = toTimeZone(deltaDate, tz);
|
||||
|
||||
if (
|
||||
tzD3.hour === utcDate.getUTCHours() &&
|
||||
tzD3.minute === utcDate.getUTCMinutes()
|
||||
) {
|
||||
return tzD3;
|
||||
}
|
||||
|
||||
var diff = tzD3.offset - offset;
|
||||
var h = Math.floor(Math.abs(diff) / 60);
|
||||
var m = Math.abs(diff) % 60;
|
||||
var sign = Math.abs(diff) / diff;
|
||||
tzD3.hour -= h * sign;
|
||||
tzD3.minute -= m * sign;
|
||||
|
||||
return tzD3;
|
||||
}
|
||||
|
||||
function toUTCISOString(date, timeZone) {
|
||||
var whole = toUTC(date, timeZone);
|
||||
return toOffsetISOString(whole);
|
||||
}
|
||||
|
||||
XTZ = {
|
||||
// bespoke date =>
|
||||
// 2021-11-07T3:15:59-0500
|
||||
toOffsetISOString: toOffsetISOString,
|
||||
|
||||
// -240 => -0400
|
||||
formatOffset: formatOffset,
|
||||
|
||||
// [ "2021-11-07T08:15:59Z", "America/New_York" ]
|
||||
// => "2021-11-07T03:15:59-0500" // 2021-11-07 03:15:59
|
||||
toTimeZone: toTimeZone,
|
||||
toTimeZoneISOString: toTimeZoneISOString,
|
||||
|
||||
// [ "2021-11-07 03:15:59", "America/New_York" ]
|
||||
// => "2021-11-07T03:15:59-0500" // 2021-11-07T08:15:59Z
|
||||
toUTC: toUTC,
|
||||
toUTCISOString: toUTCISOString,
|
||||
};
|
||||
|
||||
if ("undefined" != typeof module && module.exports) {
|
||||
module.exports = XTZ;
|
||||
}
|
||||
})();
|
||||
|
|
|
|||
Loading…
Reference in New Issue