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74
README.md
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README.md
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# [xtz.js](https://github.com/therootcompany/tz.js)
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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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A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native `Intl.DateTimeFormat`
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translate between Time Zones and UTC with native
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in ~100 LoC. For Node.js & Browsers.
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`Intl.DateTimeFormat` 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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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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# Features
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- [x] Translate a UTC time to a Time Zone
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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] Translate a Zoned time to UTC
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- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
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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] Well-tested `npm run test`
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- [x] Lightweight (No deps)
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- [x] Lightweight (No deps)
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- 5kb Source + Comments
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- 5kb Source + Comments
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- 2.5kb Minified
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- 2.5kb Minified
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- <1kb `gzip`d
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- <1kb `gzip`d
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Compatible with Browsers, and Node.js.
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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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# API
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- `toTimeZone(utcDate, timeZone)`
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- `toTimeZone(utcDate, timeZone)`
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- `toTimeZoneISOString(isoString, timeZone)`
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- `toTimeZoneISOString(isoString, timeZone)`
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- `toUTC(dtString, timeZone)`
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- `toUTC(dtString, timeZone)`
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- `toUTCISOString(dtString, timeZone)`
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- `toUTCISOString(dtString, timeZone)`
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## `toTimeZone(utcDate, 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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```js
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var tzDate = TZ.toTimeZone(
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var tzDate = TZ.toTimeZone(
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new Date("2021-11-07T08:15:59.000Z"),
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new Date("2021-11-07T08:15:59.000Z"),
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"America/New_York"
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"America/New_York"
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);
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);
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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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var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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```
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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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```js
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var utcDate = TZ.toUTC(
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var utcDate = TZ.toUTC(
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new Date("2021-11-07T03:15:59.000Z"),
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new Date("2021-11-07T03:15:59.000Z"),
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"America/New_York"
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"America/New_York"
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);
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);
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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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> In 2021 Daylight Savings (in the US)
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>
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>
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> - begins at 2am on March 14th
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> - begins at 2am on March 14th
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> - ends at 2am on November 7th
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> - ends at 2am on November 7th
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>
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>
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> See <https://www.timeanddate.com/time/change/usa>.
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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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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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- 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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```js
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is an hour early in real ("tick-tock" or "monotonic") time.
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var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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```js
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utcDate.toISOString();
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var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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// "2021-03-14T02:15:59.000-0400"
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utcDate.toISOString();
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// (same as "2021-03-14T01:15:59.000-0500")
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// "2021-03-14T02:15:59.000-0400"
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```
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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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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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- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time
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```js
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with this library.
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var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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```js
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utcDate.toISOString();
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var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
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utcDate.toISOString();
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// (an hour before the 2nd 2am at "2021-11-07T01:15:59.000-0500")
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// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
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```
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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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# List of Time Zones
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142
examples.js
142
examples.js
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var XTZ;
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var XTZ;
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(function () {
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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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if (!XTZ) {
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try {
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try {
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XTZ = require("xtz");
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XTZ = require("xtz");
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} catch (e) {
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} catch (e) {
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XTZ = require("./xtz.js");
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XTZ = require("./xtz.js");
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}
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}
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}
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}
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var TZ = XTZ;
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var TZ = XTZ;
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var tzDate;
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var tzDate;
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//
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//
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// UTC-absolute time translated to a Time Zone
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// UTC-absolute time translated to a Time Zone
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//
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//
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function demo1() {
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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("What's the UTC equivalent of 8:15am in New York?");
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console.info();
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console.info();
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console.info("\t// during daylight savings");
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console.info("\t// during daylight savings");
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console.info(
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console.info(`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`);
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`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`
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console.info(`\ttzDate.toISOString()`);
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);
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tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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console.info(`\ttzDate.toISOString()`);
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console.info(
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tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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"\t" + tzDate.toISOString(),
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console.info(
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"// same as",
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"\t" + tzDate.toISOString(),
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new Date(tzDate.toISOString()).toISOString()
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"// same as",
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);
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new Date(tzDate.toISOString()).toISOString()
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console.info();
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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("\t// during standard time");
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console.info(
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console.info(`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`);
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`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`
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console.info(`\ttzDate.toISOString()`);
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);
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tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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console.info(`\ttzDate.toISOString()`);
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console.info(
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tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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"\t" + tzDate.toISOString(),
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console.info(
|
"// same as",
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"\t" + tzDate.toISOString(),
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new Date(tzDate.toISOString()).toISOString()
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"// same as",
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);
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new Date(tzDate.toISOString()).toISOString()
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console.info();
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);
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}
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console.info();
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}
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//
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//
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// Time Zone-relative time translated to UTC
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// Time Zone-relative time translated to UTC
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//
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//
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function demo2() {
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function demo2() {
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console.info(
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console.info("What time is it in New York at 8:15am on March 14th UTC?");
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"What time is it in New York at 8:15am on March 14th UTC?"
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console.info();
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);
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console.info();
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|
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console.info("\t// during daylight savings");
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console.info("\t// during daylight savings");
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console.info(
|
console.info(
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`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
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`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
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);
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);
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console.info(`\ttzDate.toISOString()`);
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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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tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
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console.info(
|
console.info(
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"\t" + tzDate.toISOString(),
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"\t" + tzDate.toISOString(),
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"// same as",
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"// same as",
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new Date(tzDate.toISOString()).toISOString()
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new Date(tzDate.toISOString()).toISOString()
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);
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);
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console.info();
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console.info();
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|
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console.info("\t// during standard time");
|
console.info("\t// during standard time");
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console.info(
|
console.info(`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`);
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`\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(`\ttzDate.toISOString()`);
|
console.info(
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tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
|
"\t" + tzDate.toISOString(),
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console.info(
|
"// same as",
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"\t" + tzDate.toISOString(),
|
new Date(tzDate.toISOString()).toISOString()
|
||||||
"// same as",
|
);
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new Date(tzDate.toISOString()).toISOString()
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console.info();
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);
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}
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console.info();
|
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}
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|
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demo1();
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demo1();
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demo2();
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demo2();
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})();
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})();
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556
test.js
556
test.js
@ -3,314 +3,314 @@
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var TZ = require("./");
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var TZ = require("./");
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|
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function testUtcToTz(t) {
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function testUtcToTz(t) {
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var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
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var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
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if (t.result !== result) {
|
if (t.result !== result) {
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throw new Error(
|
throw new Error(
|
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`Invalid UTC to TZ conversion for ${t.desc}:\n` +
|
`Invalid UTC to TZ conversion for ${t.desc}:\n` +
|
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`\tExpected: ${t.result}\n` +
|
`\tExpected: ${t.result}\n` +
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`\tActual: ${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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}
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}
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}
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|
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function testTzToUtc(t) {
|
function testTzToUtc(t) {
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var result = TZ.toUTC.apply(TZ, t.inputs);
|
var result = TZ.toUTC.apply(TZ, t.inputs);
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if (t.result !== result.toISOString()) {
|
if (t.result !== result.toISOString()) {
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console.log(result);
|
console.log(result);
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throw new Error(
|
throw new Error(
|
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`Invalid TZ to UTC conversion for ${t.desc}:\n` +
|
`Invalid TZ to UTC conversion for ${t.desc}:\n` +
|
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`\tExpected: ${t.result}\n` +
|
`\tExpected: ${t.result}\n` +
|
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`\tActual: ${result.toISOString()}\n`
|
`\tActual: ${result.toISOString()}\n`
|
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);
|
);
|
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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?
|
// 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
|
// Start-of-DST Tests
|
||||||
//
|
//
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|
|
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// [Start]
|
// [Start]
|
||||||
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
|
// 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
|
// // 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
|
// 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
|
// // 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
|
// 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
|
// // 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
|
// 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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// // 2021-03-14T04:15:59.000-0400
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||||||
// [End]
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// [End]
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|
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// 12:15am NY -0500 => -0400
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// 12:15am NY -0500 => -0400
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{
|
{
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desc: "UTC to 12:15am NY EST",
|
desc: "UTC to 12:15am NY EST",
|
||||||
inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
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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",
|
result: "2021-03-14T00:15:59.000-0500",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 12:15am NY EST (2)",
|
desc: "UTC to 12:15am NY EST (2)",
|
||||||
inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
|
inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
|
||||||
result: "2021-03-14T00:15:59.000-0500",
|
result: "2021-03-14T00:15:59.000-0500",
|
||||||
},
|
},
|
||||||
// 1:15am NY (non-DST)
|
// 1:15am NY (non-DST)
|
||||||
{
|
{
|
||||||
desc: "UTC to 1:15am NY EST",
|
desc: "UTC to 1:15am NY EST",
|
||||||
inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
|
inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-03-14T01:15:59.000-0500",
|
result: "2021-03-14T01:15:59.000-0500",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 1:15am NY EST (2)",
|
desc: "UTC to 1:15am NY EST (2)",
|
||||||
inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
|
inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
|
||||||
result: "2021-03-14T01:15:59.000-0500",
|
result: "2021-03-14T01:15:59.000-0500",
|
||||||
},
|
},
|
||||||
|
|
||||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
||||||
|
|
||||||
// 3:15am NY (DST)
|
// 3:15am NY (DST)
|
||||||
{
|
{
|
||||||
desc: "UTC to 3:15am NY EDT",
|
desc: "UTC to 3:15am NY EDT",
|
||||||
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
|
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-03-14T03:15:59.000-0400",
|
result: "2021-03-14T03:15:59.000-0400",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 3:15am NY EDT (2)",
|
desc: "UTC to 3:15am NY EDT (2)",
|
||||||
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
|
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
|
||||||
result: "2021-03-14T03:15:59.000-0400",
|
result: "2021-03-14T03:15:59.000-0400",
|
||||||
},
|
},
|
||||||
// 4:15am NY
|
// 4:15am NY
|
||||||
{
|
{
|
||||||
desc: "UTC to 4:15am NY EDT",
|
desc: "UTC to 4:15am NY EDT",
|
||||||
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
|
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-03-14T04:15:59.000-0400",
|
result: "2021-03-14T04:15:59.000-0400",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 4:15am NY EDT (2)",
|
desc: "UTC to 4:15am NY EDT (2)",
|
||||||
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
|
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
|
||||||
result: "2021-03-14T04:15:59.000-0400",
|
result: "2021-03-14T04:15:59.000-0400",
|
||||||
},
|
},
|
||||||
|
|
||||||
//
|
//
|
||||||
// End-of-DST Tests
|
// End-of-DST Tests
|
||||||
//
|
//
|
||||||
|
|
||||||
// [Start]
|
// [Start]
|
||||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
// 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
|
// // 2021-11-07T01:15:59.000-0400
|
||||||
// // 2021-11-07 06:15:59.000
|
// // 2021-11-07 06:15:59.000
|
||||||
// // 2021-11-07T01:15:59.000-0500
|
// // 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
|
// 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
|
// // 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
|
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||||
// [End]
|
// [End]
|
||||||
|
|
||||||
// 12:15am NY -0400 => -0500
|
// 12:15am NY -0400 => -0500
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
|
desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
|
||||||
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
|
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-11-07T00:15:59.000-0400",
|
result: "2021-11-07T00:15:59.000-0400",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
|
desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
|
||||||
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
|
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
|
||||||
result: "2021-11-07T00:15:59.000-0400",
|
result: "2021-11-07T00:15:59.000-0400",
|
||||||
},
|
},
|
||||||
// 1:15am NY (DST) -0400
|
// 1:15am NY (DST) -0400
|
||||||
// NOTE: 1:15am happens TWICE (with different offsets)
|
// NOTE: 1:15am happens TWICE (with different offsets)
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
|
desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
|
||||||
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
|
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-11-07T01:15:59.000-0400",
|
result: "2021-11-07T01:15:59.000-0400",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
|
desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
|
||||||
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
|
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
|
||||||
result: "2021-11-07T01:15:59.000-0400",
|
result: "2021-11-07T01:15:59.000-0400",
|
||||||
},
|
},
|
||||||
// 1:15am NY (non-DST) -0500
|
// 1:15am NY (non-DST) -0500
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST",
|
desc: "UTC to 2021 Nov 7, 1:15am NY EST",
|
||||||
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
|
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-11-07T01:15:59.000-0500",
|
result: "2021-11-07T01:15:59.000-0500",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
|
desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
|
||||||
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
|
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
|
||||||
result: "2021-11-07T01:15:59.000-0500",
|
result: "2021-11-07T01:15:59.000-0500",
|
||||||
},
|
},
|
||||||
// 2:15am NY -0500
|
// 2:15am NY -0500
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST",
|
desc: "UTC to 2021 Nov 7, 2:15am NY EST",
|
||||||
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
|
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-11-07T02:15:59.000-0500",
|
result: "2021-11-07T02:15:59.000-0500",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
|
desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
|
||||||
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
|
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
|
||||||
result: "2021-11-07T02:15:59.000-0500",
|
result: "2021-11-07T02:15:59.000-0500",
|
||||||
},
|
},
|
||||||
// 3:15am NY
|
// 3:15am NY
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST",
|
desc: "UTC to 2021 Nov 7, 3:15am NY EST",
|
||||||
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
|
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
|
||||||
result: "2021-11-07T03:15:59.000-0500",
|
result: "2021-11-07T03:15:59.000-0500",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
|
desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
|
||||||
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
|
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
|
||||||
result: "2021-11-07T03:15:59.000-0500",
|
result: "2021-11-07T03:15:59.000-0500",
|
||||||
},
|
},
|
||||||
|
|
||||||
//
|
//
|
||||||
// Positive Offset Test
|
// Positive Offset Test
|
||||||
//
|
//
|
||||||
|
|
||||||
// Colombo +0530 (not DST)
|
// Colombo +0530 (not DST)
|
||||||
{
|
{
|
||||||
desc: "UTC to Asia/Colombo (1)",
|
desc: "UTC to Asia/Colombo (1)",
|
||||||
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
|
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
|
||||||
result: "2021-03-14T13:45:59.000+0530",
|
result: "2021-03-14T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to Asia/Colombo (2)",
|
desc: "UTC to Asia/Colombo (2)",
|
||||||
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
|
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
|
||||||
result: "2021-03-14T13:45:59.000+0530",
|
result: "2021-03-14T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to Asia/Colombo (3)",
|
desc: "UTC to Asia/Colombo (3)",
|
||||||
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
|
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
|
||||||
result: "2021-11-07T13:45:59.000+0530",
|
result: "2021-11-07T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
desc: "UTC to Asia/Colombo (4)",
|
desc: "UTC to Asia/Colombo (4)",
|
||||||
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
|
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
|
||||||
result: "2021-11-07T13:45:59.000+0530",
|
result: "2021-11-07T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
].forEach(testUtcToTz);
|
].forEach(testUtcToTz);
|
||||||
console.info("Pass: UTC to TZ for America/New_York and Asia/Colombo");
|
console.info("Pass: UTC to TZ for America/New_York and Asia/Colombo");
|
||||||
|
|
||||||
[
|
[
|
||||||
//
|
//
|
||||||
// Start-of-DST Tests
|
// Start-of-DST Tests
|
||||||
//
|
//
|
||||||
|
|
||||||
// [Start]
|
// [Start]
|
||||||
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
|
// 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
|
// // 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
|
// 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
|
// // 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
|
// 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
|
// // 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
|
// 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
|
// // 2021-03-14T04:15:59.000-0400
|
||||||
// [End]
|
// [End]
|
||||||
|
|
||||||
// 12:15am NY -0500 => -0400
|
// 12:15am NY -0500 => -0400
|
||||||
{
|
{
|
||||||
// 2021-03-14T05:15:59.000Z
|
// 2021-03-14T05:15:59.000Z
|
||||||
desc: "2021 Mar 14, 12:15am NY EST to UTC",
|
desc: "2021 Mar 14, 12:15am NY EST to UTC",
|
||||||
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
|
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
|
||||||
result: "2021-03-14T00:15:59.000-0500",
|
result: "2021-03-14T00:15:59.000-0500",
|
||||||
},
|
},
|
||||||
// 1:15am NY (non-DST)
|
// 1:15am NY (non-DST)
|
||||||
{
|
{
|
||||||
// 2021-03-14T06:15:59.000Z
|
// 2021-03-14T06:15:59.000Z
|
||||||
desc: "2021 Mar 14, 1:15am NY EST to UTC",
|
desc: "2021 Mar 14, 1:15am NY EST to UTC",
|
||||||
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
|
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
|
||||||
result: "2021-03-14T01:15:59.000-0500",
|
result: "2021-03-14T01:15:59.000-0500",
|
||||||
},
|
},
|
||||||
|
|
||||||
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
|
||||||
// This test is here to document the "undefined" behavior
|
// This test is here to document the "undefined" behavior
|
||||||
{
|
{
|
||||||
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
|
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
|
||||||
// would be reasonable substitutions, I think
|
// would be reasonable substitutions, I think
|
||||||
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
|
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
|
||||||
inputs: ["2021-03-14 02:15:59.000", "America/New_York"],
|
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: "2021-03-14T01:15:59.000-0500", // 2021-03-14T06:15:59.000Z
|
||||||
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
|
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
|
||||||
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
|
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
|
||||||
},
|
},
|
||||||
|
|
||||||
// 3:15am NY (DST)
|
// 3:15am NY (DST)
|
||||||
{
|
{
|
||||||
// 2021-03-14T07:15:59.000Z
|
// 2021-03-14T07:15:59.000Z
|
||||||
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
|
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
|
||||||
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
|
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
|
||||||
result: "2021-03-14T03:15:59.000-0400",
|
result: "2021-03-14T03:15:59.000-0400",
|
||||||
},
|
},
|
||||||
// 4:15am NY
|
// 4:15am NY
|
||||||
{
|
{
|
||||||
// 2021-03-14T08:15:59.000Z
|
// 2021-03-14T08:15:59.000Z
|
||||||
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
|
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
|
||||||
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
|
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
|
||||||
result: "2021-03-14T04:15:59.000-0400",
|
result: "2021-03-14T04:15:59.000-0400",
|
||||||
},
|
},
|
||||||
|
|
||||||
//
|
//
|
||||||
// End-of-DST Tests
|
// End-of-DST Tests
|
||||||
//
|
//
|
||||||
|
|
||||||
// [Start]
|
// [Start]
|
||||||
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
|
// 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
|
// // 2021-11-07T01:15:59.000-0400
|
||||||
// // 2021-11-07 06:15:59.000
|
// // 2021-11-07 06:15:59.000
|
||||||
// // 2021-11-07T01:15:59.000-0500
|
// // 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
|
// 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
|
// // 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
|
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
|
||||||
// [End]
|
// [End]
|
||||||
|
|
||||||
// 12:15am NY -0400 => -0500
|
// 12:15am NY -0400 => -0500
|
||||||
{
|
{
|
||||||
// 2021-11-07T04:15:59.000Z
|
// 2021-11-07T04:15:59.000Z
|
||||||
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
|
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
|
||||||
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
|
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
|
||||||
result: "2021-11-07T00:15:59.000-0400",
|
result: "2021-11-07T00:15:59.000-0400",
|
||||||
},
|
},
|
||||||
|
|
||||||
// 1:15am NY (DST) -0400
|
// 1:15am NY (DST) -0400
|
||||||
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
|
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
|
||||||
{
|
{
|
||||||
// ==> 2021-11-07T05:15:59.000Z
|
// ==> 2021-11-07T05:15:59.000Z
|
||||||
// [Skip] 2021-11-07T06:15:59.000Z
|
// [Skip] 2021-11-07T06:15:59.000Z
|
||||||
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
|
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
|
||||||
inputs: ["2021-11-07 01:15:59.000", "America/New_York"],
|
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: "2021-11-07T01:15:59.000-0400", // 2021-11-07T05:15:59.000Z
|
||||||
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
|
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
|
||||||
},
|
},
|
||||||
|
|
||||||
// 2:15am NY -0500
|
// 2:15am NY -0500
|
||||||
{
|
{
|
||||||
// 2021-11-07T07:15:59.000Z
|
// 2021-11-07T07:15:59.000Z
|
||||||
desc: "2021 Nov 7, 2:15am NY EST to UTC",
|
desc: "2021 Nov 7, 2:15am NY EST to UTC",
|
||||||
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
|
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
|
||||||
result: "2021-11-07T02:15:59.000-0500",
|
result: "2021-11-07T02:15:59.000-0500",
|
||||||
},
|
},
|
||||||
// 3:15am NY
|
// 3:15am NY
|
||||||
{
|
{
|
||||||
// 2021-11-07T08:15:59.000Z
|
// 2021-11-07T08:15:59.000Z
|
||||||
desc: "2021 Nov 7, 3:15am NY EST to UTC",
|
desc: "2021 Nov 7, 3:15am NY EST to UTC",
|
||||||
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
|
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
|
||||||
result: "2021-11-07T03:15:59.000-0500",
|
result: "2021-11-07T03:15:59.000-0500",
|
||||||
},
|
},
|
||||||
|
|
||||||
//
|
//
|
||||||
// Positive Offset Test
|
// Positive Offset Test
|
||||||
//
|
//
|
||||||
|
|
||||||
// Colombo +0530 (not DST)
|
// Colombo +0530 (not DST)
|
||||||
{
|
{
|
||||||
// 2021-03-14T08:15:59.000Z
|
// 2021-03-14T08:15:59.000Z
|
||||||
desc: "Asia/Colombo to UTC (1)",
|
desc: "Asia/Colombo to UTC (1)",
|
||||||
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
|
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
|
||||||
result: "2021-03-14T13:45:59.000+0530",
|
result: "2021-03-14T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
{
|
{
|
||||||
// 2021-03-14T08:15:59.000Z
|
// 2021-03-14T08:15:59.000Z
|
||||||
desc: "Asia/Colombo to UTC (2)",
|
desc: "Asia/Colombo to UTC (2)",
|
||||||
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
|
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
|
||||||
result: "2021-11-07T13:45:59.000+0530",
|
result: "2021-11-07T13:45:59.000+0530",
|
||||||
},
|
},
|
||||||
].forEach(testTzToUtc);
|
].forEach(testTzToUtc);
|
||||||
console.info("Pass: TZ to UTC for America/New_York and Asia/Colombo");
|
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;
|
var XTZ;
|
||||||
|
|
||||||
(function () {
|
(function () {
|
||||||
"use strict";
|
"use strict";
|
||||||
|
|
||||||
function toTimeZone(date, timeZone) {
|
function toTimeZone(date, timeZone) {
|
||||||
// ISO string or existing date object
|
// ISO string or existing date object
|
||||||
date = new Date(date);
|
date = new Date(date);
|
||||||
var options = {
|
var options = {
|
||||||
timeZone: timeZone,
|
timeZone: timeZone,
|
||||||
year: "numeric",
|
year: "numeric",
|
||||||
month: "numeric",
|
month: "numeric",
|
||||||
day: "numeric",
|
day: "numeric",
|
||||||
hour12: false,
|
hour12: false,
|
||||||
hour: "numeric",
|
hour: "numeric",
|
||||||
minute: "numeric",
|
minute: "numeric",
|
||||||
second: "numeric",
|
second: "numeric",
|
||||||
fractionalSecondDigits: 3,
|
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,
|
|
||||||
};
|
};
|
||||||
|
|
||||||
if ("undefined" != typeof module && module.exports) {
|
var tzOptions = Object.assign({ timeZoneName: "long" }, options);
|
||||||
module.exports = XTZ;
|
|
||||||
|
// 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…
x
Reference in New Issue
Block a user