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5c35bd2148
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de3f74a572
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*.min.js
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"printWidth": 80,
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"tabWidth": 2,
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"singleQuote": false,
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"bracketSpacing": true,
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"semi": true
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110
README.md
110
README.md
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@ -1,12 +1,10 @@
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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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||||||
|
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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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A fast, lightweight, zero-dependency library to
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||||||
in ~100 LoC. For Node.js & Browsers.
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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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||||||
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[](https://therootcompany.github.io/tz.js/)
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XTZ is a poor man's Temporal polyfill, but just for time zones.
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||||||
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||||||
XTZ is a poor man's `Temporal` polyfill, but just for time zones. \
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Demo: <https://therootcompany.github.io/tz.js/>
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> What UTC time will it be when it's 3:15am in New York?
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> What UTC time will it be when it's 3:15am in New York?
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@ -19,7 +17,7 @@ TZ.toUTCISOString("2021-11-07 03:15:59.000", "America/New_York");
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```js
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```js
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var tzDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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var tzDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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// {
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// {
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// year: 2021, month: 10, day: 7,
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// year: 2021, month: 11, day: 7,
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// hour: 3, minute: 15, second: 59, millisecond: 0,
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// hour: 3, minute: 15, second: 59, millisecond: 0,
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// offset: -300, timeZoneName: "Eastern Standard Time"
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// offset: -300, timeZoneName: "Eastern Standard Time"
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// }
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// }
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@ -40,7 +38,7 @@ TZ.toTimeZoneISOString("2021-03-14T07:15:59.000Z", "America/New_York");
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```js
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```js
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var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York");
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var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York");
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// {
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// {
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// year: 2021, month: 2, day: 14,
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// year: 2021, month: 3, day: 14,
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// hour: 3, minute: 15, second: 59, millisecond: 0,
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// hour: 3, minute: 15, second: 59, millisecond: 0,
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// offset: -240, timeZoneName: "Eastern Daylight Time"
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// offset: -240, timeZoneName: "Eastern Daylight Time"
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// }
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// }
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@ -52,26 +50,15 @@ utcDate.toISOString();
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|
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# Features
|
# Features
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||||||
|
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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...
|
- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
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||||||
- [x] Well-tested `npm run test`
|
- [x] Lightweight (No deps)
|
||||||
- [x] Lightweight (No deps)
|
- 5kb Source + Comments
|
||||||
- 5kb Source + Comments
|
- 2.5kb Minified
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||||||
- 2.5kb Minified
|
- <1kb `gzip`d
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||||||
- <1kb `gzip`d
|
|
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|
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Compatible with Browsers, and Node.js.
|
Compatible with Node.js & Browsers.
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|
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## Browsers
|
|
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|
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```html
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|
||||||
<script src="https://unpkg.com/xtz@latest/xtz.min.js"></script>
|
|
||||||
```
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|
||||||
|
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```js
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var TZ = window.XTZ;
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||||||
```
|
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||||||
|
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## Node.js & Webpack
|
## Node.js & Webpack
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||||||
|
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@ -83,22 +70,28 @@ npm install --save xtz
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var TZ = require("xtz");
|
var TZ = require("xtz");
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```
|
```
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||||||
|
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## Demo
|
## Browsers
|
||||||
|
|
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See <https://therootcompany.github.io/tz.js/>.
|
```html
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<script src="https://unpkg.com/xtz@1.0.0-rc.1/xtz.min.js"></script>
|
||||||
|
```
|
||||||
|
|
||||||
|
```js
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var TZ = window.XTZ;
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|
```
|
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|
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# API
|
# 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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|
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## `toTimeZone(utcDate, timeZone)`
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## `toTimeZone(utcDate, timeZone)`
|
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|
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> Convert UTC into a Target Time Zone
|
> Convert UTC into a Target Time Zone
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|
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Use ISO timestamps representing the absolute UTC time (with or without offset):
|
Use ISO timestamps representing the absolute UTC time in the target time zone:
|
||||||
|
|
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```txt
|
```txt
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"2021-11-07T08:15:59.000Z"
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"2021-11-07T08:15:59.000Z"
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|
|
@ -121,8 +114,8 @@ You can also use a date object with an absolute UTC time:
|
||||||
|
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```js
|
```js
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var tzDate = TZ.toTimeZone(
|
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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@ -145,7 +138,7 @@ new Date("2021-11-07T03:15:59.000-0500").toISOString());
|
||||||
Use ISO-like timestamps representing the _local_ time in the target time zone:
|
Use ISO-like timestamps representing the _local_ time in the target time zone:
|
||||||
|
|
||||||
```txt
|
```txt
|
||||||
"2021-11-0 03:15:59.000"
|
"2021-11-0 T03:15:59.000"
|
||||||
```
|
```
|
||||||
|
|
||||||
Convert directly to an offset ISO String:
|
Convert directly to an offset ISO String:
|
||||||
|
|
@ -161,13 +154,12 @@ Or our bespoke date object:
|
||||||
var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
|
var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
|
||||||
```
|
```
|
||||||
|
|
||||||
You can also use a date object as the source time, but the date's UTC time will be treated as **_relative to time
|
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).
|
||||||
zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support).
|
|
||||||
|
|
||||||
```js
|
```js
|
||||||
var utcDate = TZ.toUTC(
|
var utcDate = TZ.toUTC(
|
||||||
new Date("2021-11-07T03:15:59.000Z"),
|
new Date("2021-11-07T03:15:59.000Z"),
|
||||||
"America/New_York"
|
"America/New_York"
|
||||||
);
|
);
|
||||||
```
|
```
|
||||||
|
|
||||||
|
|
@ -180,32 +172,30 @@ utcDate.toISOString();
|
||||||
|
|
||||||
> In 2021 Daylight Savings (in the US)
|
> In 2021 Daylight Savings (in the US)
|
||||||
>
|
>
|
||||||
> - begins at 2am on March 14th (skips to 3am)
|
> - begins at 2am on March 14th
|
||||||
> - ends at 2am on November 7th (resets to 1am)
|
> - ends at 2am on November 7th
|
||||||
>
|
>
|
||||||
> See <https://www.timeanddate.com/time/change/usa>.
|
> See <https://www.timeanddate.com/time/change/usa>.
|
||||||
|
|
||||||
Q: What happens in March when 2am is skipped?
|
Q: What happens in March when 2am is skipped?
|
||||||
|
|
||||||
- A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which
|
- 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.
|
||||||
is an hour early in real ("tick-tock" or "monotonic") time.
|
```js
|
||||||
```js
|
var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
|
||||||
var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
|
utcDate.toISOString();
|
||||||
utcDate.toISOString();
|
// "2021-03-14T02:15:59.000-0400"
|
||||||
// "2021-03-14T02:15:59.000-0400"
|
// (same as "2021-03-14T01:15:59.000-0500")
|
||||||
// (same as "2021-03-14T01:15:59.000-0500")
|
```
|
||||||
```
|
|
||||||
|
|
||||||
Q: What happens in November when 1am happens twice?
|
Q: What happens in November when 2am happens twice?
|
||||||
|
|
||||||
- A: Although both 1ams are distinguishable with ISO offset times, only the first can be resolved from a local time
|
- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time with this library.
|
||||||
with this library.
|
```js
|
||||||
```js
|
var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
|
||||||
var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
|
utcDate.toISOString();
|
||||||
utcDate.toISOString();
|
// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
|
||||||
// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
|
// (an hour before the 2nd 2am at "2021-11-07T01:15:59.000-0500")
|
||||||
// (an hour before the 2nd 1am at "2021-11-07T01:15:59.000-0500")
|
```
|
||||||
```
|
|
||||||
|
|
||||||
# List of Time Zones
|
# List of Time Zones
|
||||||
|
|
||||||
|
|
|
||||||
142
examples.js
142
examples.js
|
|
@ -1,81 +1,89 @@
|
||||||
var XTZ;
|
var XTZ;
|
||||||
|
|
||||||
(function () {
|
(function () {
|
||||||
"use strict";
|
"use strict";
|
||||||
|
|
||||||
if (!XTZ) {
|
if (!XTZ) {
|
||||||
try {
|
try {
|
||||||
XTZ = require("xtz");
|
XTZ = require("xtz");
|
||||||
} catch (e) {
|
} catch (e) {
|
||||||
XTZ = require("./xtz.js");
|
XTZ = require("./xtz.js");
|
||||||
|
}
|
||||||
}
|
}
|
||||||
}
|
|
||||||
|
|
||||||
var TZ = XTZ;
|
var TZ = XTZ;
|
||||||
var tzDate;
|
var tzDate;
|
||||||
|
|
||||||
//
|
//
|
||||||
// UTC-absolute time translated to a Time Zone
|
// UTC-absolute time translated to a Time Zone
|
||||||
//
|
//
|
||||||
function demo1() {
|
function demo1() {
|
||||||
console.info("What's the UTC equivalent of 8:15am in New York?");
|
console.info("What's the UTC equivalent of 8:15am in New York?");
|
||||||
console.info();
|
console.info();
|
||||||
|
|
||||||
console.info("\t// during daylight savings");
|
console.info("\t// during daylight savings");
|
||||||
console.info(`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`);
|
console.info(
|
||||||
console.info(`\ttzDate.toISOString()`);
|
`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`
|
||||||
tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
|
);
|
||||||
console.info(
|
console.info(`\ttzDate.toISOString()`);
|
||||||
"\t" + tzDate.toISOString(),
|
tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
|
||||||
"// same as",
|
console.info(
|
||||||
new Date(tzDate.toISOString()).toISOString()
|
"\t" + tzDate.toISOString(),
|
||||||
);
|
"// same as",
|
||||||
console.info();
|
new Date(tzDate.toISOString()).toISOString()
|
||||||
|
);
|
||||||
|
console.info();
|
||||||
|
|
||||||
console.info("\t// during standard time");
|
console.info("\t// during standard time");
|
||||||
console.info(`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`);
|
console.info(
|
||||||
console.info(`\ttzDate.toISOString()`);
|
`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`
|
||||||
tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
|
);
|
||||||
console.info(
|
console.info(`\ttzDate.toISOString()`);
|
||||||
"\t" + tzDate.toISOString(),
|
tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
|
||||||
"// same as",
|
console.info(
|
||||||
new Date(tzDate.toISOString()).toISOString()
|
"\t" + tzDate.toISOString(),
|
||||||
);
|
"// same as",
|
||||||
console.info();
|
new Date(tzDate.toISOString()).toISOString()
|
||||||
}
|
);
|
||||||
|
console.info();
|
||||||
|
}
|
||||||
|
|
||||||
//
|
//
|
||||||
// Time Zone-relative time translated to UTC
|
// Time Zone-relative time translated to UTC
|
||||||
//
|
//
|
||||||
function demo2() {
|
function demo2() {
|
||||||
console.info("What time is it in New York at 8:15am on March 14th UTC?");
|
console.info(
|
||||||
console.info();
|
"What time is it in New York at 8:15am on March 14th UTC?"
|
||||||
|
);
|
||||||
|
console.info();
|
||||||
|
|
||||||
console.info("\t// during daylight savings");
|
console.info("\t// during daylight savings");
|
||||||
console.info(
|
console.info(
|
||||||
`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
|
`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
|
||||||
);
|
);
|
||||||
console.info(`\ttzDate.toISOString()`);
|
console.info(`\ttzDate.toISOString()`);
|
||||||
tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
|
tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
|
||||||
console.info(
|
console.info(
|
||||||
"\t" + tzDate.toISOString(),
|
"\t" + tzDate.toISOString(),
|
||||||
"// same as",
|
"// same as",
|
||||||
new Date(tzDate.toISOString()).toISOString()
|
new Date(tzDate.toISOString()).toISOString()
|
||||||
);
|
);
|
||||||
console.info();
|
console.info();
|
||||||
|
|
||||||
console.info("\t// during standard time");
|
console.info("\t// during standard time");
|
||||||
console.info(`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`);
|
console.info(
|
||||||
console.info(`\ttzDate.toISOString()`);
|
`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`
|
||||||
tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
|
);
|
||||||
console.info(
|
console.info(`\ttzDate.toISOString()`);
|
||||||
"\t" + tzDate.toISOString(),
|
tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
|
||||||
"// same as",
|
console.info(
|
||||||
new Date(tzDate.toISOString()).toISOString()
|
"\t" + tzDate.toISOString(),
|
||||||
);
|
"// same as",
|
||||||
console.info();
|
new Date(tzDate.toISOString()).toISOString()
|
||||||
}
|
);
|
||||||
|
console.info();
|
||||||
|
}
|
||||||
|
|
||||||
demo1();
|
demo1();
|
||||||
demo2();
|
demo2();
|
||||||
})();
|
})();
|
||||||
|
|
|
||||||
175
index.html
175
index.html
|
|
@ -1,175 +0,0 @@
|
||||||
<!DOCTYPE html>
|
|
||||||
<html lang="en" class="no-js">
|
|
||||||
<head>
|
|
||||||
<meta charset="UTF-8" />
|
|
||||||
<meta name="viewport" content="width=device-width" />
|
|
||||||
|
|
||||||
<title>Convert TimeZones in Your Browser</title>
|
|
||||||
|
|
||||||
<link rel="canonical" href="https://therootcompany.github.io/tz.js/" />
|
|
||||||
|
|
||||||
<meta name="theme-color" content="#FF00FF" />
|
|
||||||
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/spcss@0.7.0" />
|
|
||||||
|
|
||||||
<style>
|
|
||||||
input {
|
|
||||||
width: 24em;
|
|
||||||
}
|
|
||||||
</style>
|
|
||||||
</head>
|
|
||||||
|
|
||||||
<body>
|
|
||||||
<!-- Content -->
|
|
||||||
<h1>
|
|
||||||
<a href="https://github.com/therootcompany/tz.js" target="_blank"
|
|
||||||
>XTZ.js</a
|
|
||||||
>
|
|
||||||
</h1>
|
|
||||||
|
|
||||||
<h3>
|
|
||||||
Current Time:
|
|
||||||
<br />
|
|
||||||
<span class="js-my-dt">YYYY-MM-DDThh:mm:ss.mmm+0000</span>
|
|
||||||
</h3>
|
|
||||||
Current Time Zone: <span class="js-my-tz">America/XXXX</span>
|
|
||||||
<br />
|
|
||||||
Current Time Offset: <span class="js-my-offset">-0000</span>
|
|
||||||
<hr />
|
|
||||||
|
|
||||||
<form class="js-tz2utc">
|
|
||||||
<h3>Relative TimeZone to Absolute UTC:</h3>
|
|
||||||
<label>
|
|
||||||
Time:
|
|
||||||
<input
|
|
||||||
class="js-dt-tz"
|
|
||||||
type="text"
|
|
||||||
placeholder="ex: 2021-03-14 03:15:69.000"
|
|
||||||
required
|
|
||||||
/>
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
|
|
||||||
<label>
|
|
||||||
Zone:
|
|
||||||
<input
|
|
||||||
class="js-tz-tz"
|
|
||||||
type="text"
|
|
||||||
placeholder="ex: America/New_York"
|
|
||||||
required
|
|
||||||
/>
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
<label>
|
|
||||||
ISO:
|
|
||||||
<input class="js-my-dt-tz" type="text" disabled />
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
<br />
|
|
||||||
<button type="submit">Convert to UTC!</button>
|
|
||||||
<br />
|
|
||||||
</form>
|
|
||||||
|
|
||||||
<hr />
|
|
||||||
|
|
||||||
<form class="js-utc2tz">
|
|
||||||
<h3>Absolute UTC to Relative TimeZone</h3>
|
|
||||||
<label>
|
|
||||||
Time:
|
|
||||||
<input
|
|
||||||
class="js-dt-utc"
|
|
||||||
type="text"
|
|
||||||
placeholder="ex: 2021-03-14 03:15:69.000"
|
|
||||||
required
|
|
||||||
/>
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
<label>
|
|
||||||
Zone:
|
|
||||||
<input
|
|
||||||
class="js-tz-utc"
|
|
||||||
type="text"
|
|
||||||
placeholder="ex: America/New_York"
|
|
||||||
required
|
|
||||||
/>
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
<label>
|
|
||||||
ISO:
|
|
||||||
<input class="js-my-dt-utc" type="text" disabled />
|
|
||||||
</label>
|
|
||||||
<br />
|
|
||||||
<br />
|
|
||||||
<button type="submit">Convert to TZ!</button>
|
|
||||||
<br />
|
|
||||||
</form>
|
|
||||||
|
|
||||||
<hr />
|
|
||||||
<h3>Time Zones List</h3>
|
|
||||||
See the
|
|
||||||
<a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones"
|
|
||||||
>Full List of Time Zones</a
|
|
||||||
>
|
|
||||||
on Wikipedia.
|
|
||||||
<pre>
|
|
||||||
America/New_York -0500 -0400 (Eastern Time)
|
|
||||||
America/Denver -0700 -0600 (Mountain Time)
|
|
||||||
America/Phoenix -0700 (No DST) (Arizona Time)
|
|
||||||
America/Los_Angeles -0800 -0700 (Pacific Time)
|
|
||||||
Australia/Adelaide +0930 +1030 (30-min)
|
|
||||||
Asia/Kathmandu +0545 (No DST) (45-min)
|
|
||||||
Asia/Kolkata +0530 (No DST) (30-min)</pre
|
|
||||||
>
|
|
||||||
<hr />
|
|
||||||
Code at
|
|
||||||
<a href="https://github.com/therootcompany/tz.js" target="_blank"
|
|
||||||
>github.com/therootcompany/tz.js</a
|
|
||||||
>
|
|
||||||
<script src="./xtz.js"></script>
|
|
||||||
<script>
|
|
||||||
function $(sel, el) {
|
|
||||||
return (el || document.body).querySelector(sel);
|
|
||||||
}
|
|
||||||
|
|
||||||
function toUTC() {
|
|
||||||
var curDt = $(".js-dt-tz").value;
|
|
||||||
var curTz = $(".js-tz-tz").value;
|
|
||||||
$(".js-my-dt-tz").value = XTZ.toUTC(curDt, curTz).toISOString();
|
|
||||||
}
|
|
||||||
|
|
||||||
function toTZ() {
|
|
||||||
var curDt = $(".js-dt-utc").value;
|
|
||||||
var curTz = $(".js-tz-utc").value;
|
|
||||||
$(".js-my-dt-utc").value = XTZ.toTimeZone(curDt, curTz).toISOString();
|
|
||||||
}
|
|
||||||
|
|
||||||
var myTz = new Intl.DateTimeFormat("default", {}).resolvedOptions()
|
|
||||||
.timeZone;
|
|
||||||
$(".js-my-tz").innerText = myTz;
|
|
||||||
$(".js-tz-tz").value = myTz;
|
|
||||||
$(".js-tz-utc").value = myTz;
|
|
||||||
$(".js-my-offset").innerText = -1 * new Date().getTimezoneOffset();
|
|
||||||
|
|
||||||
var myDate = new Date();
|
|
||||||
$(".js-my-dt").innerText = XTZ.toTimeZone(myDate, myTz).toISOString();
|
|
||||||
$(".js-dt-tz").value = XTZ.toTimeZone(myDate, myTz)
|
|
||||||
.toISOString()
|
|
||||||
.replace("T", " ")
|
|
||||||
.replace(/(Z|(\+|-)\d+)$/, "");
|
|
||||||
$(".js-dt-utc").value = myDate.toISOString();
|
|
||||||
|
|
||||||
$("form.js-utc2tz").addEventListener("submit", function (ev) {
|
|
||||||
ev.preventDefault();
|
|
||||||
ev.stopPropagation();
|
|
||||||
toTZ();
|
|
||||||
});
|
|
||||||
$("form.js-tz2utc").addEventListener("submit", function (ev) {
|
|
||||||
ev.preventDefault();
|
|
||||||
ev.stopPropagation();
|
|
||||||
toUTC();
|
|
||||||
});
|
|
||||||
|
|
||||||
toUTC();
|
|
||||||
toTZ();
|
|
||||||
</script>
|
|
||||||
</body>
|
|
||||||
</html>
|
|
||||||
|
|
@ -1,11 +1,10 @@
|
||||||
{
|
{
|
||||||
"name": "xtz",
|
"name": "xtz",
|
||||||
"version": "1.0.1",
|
"version": "1.0.0",
|
||||||
"description": "A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native Intl.DateTimeFormat in ~100 LoC. For Node.js & Browsers.",
|
"description": "A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native Intl.DateTimeFormat in ~100 LoC. For Node.js & Browsers.",
|
||||||
"main": "xtz.js",
|
"main": "xtz.js",
|
||||||
"scripts": {
|
"scripts": {
|
||||||
"test": "node ./test.js",
|
"test": "node ./test.js"
|
||||||
"build": "uglifyjs ./xtz.js > ./xtz.min.js ; gzip -k -f ./xtz.min.js"
|
|
||||||
},
|
},
|
||||||
"repository": {
|
"repository": {
|
||||||
"type": "git",
|
"type": "git",
|
||||||
|
|
|
||||||
556
test.js
556
test.js
|
|
@ -3,314 +3,314 @@
|
||||||
var TZ = require("./");
|
var TZ = require("./");
|
||||||
|
|
||||||
function testUtcToTz(t) {
|
function testUtcToTz(t) {
|
||||||
var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
|
var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
|
||||||
if (t.result !== result) {
|
if (t.result !== result) {
|
||||||
throw new Error(
|
throw new Error(
|
||||||
`Invalid UTC to TZ conversion for ${t.desc}:\n` +
|
`Invalid UTC to TZ conversion for ${t.desc}:\n` +
|
||||||
`\tExpected: ${t.result}\n` +
|
`\tExpected: ${t.result}\n` +
|
||||||
`\tActual: ${result}\n`
|
`\tActual: ${result}\n`
|
||||||
);
|
);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
function testTzToUtc(t) {
|
function testTzToUtc(t) {
|
||||||
var result = TZ.toUTC.apply(TZ, t.inputs);
|
var result = TZ.toUTC.apply(TZ, t.inputs);
|
||||||
if (t.result !== result.toISOString()) {
|
if (t.result !== result.toISOString()) {
|
||||||
console.log(result);
|
console.log(result);
|
||||||
throw new Error(
|
throw new Error(
|
||||||
`Invalid TZ to UTC conversion for ${t.desc}:\n` +
|
`Invalid TZ to UTC conversion for ${t.desc}:\n` +
|
||||||
`\tExpected: ${t.result}\n` +
|
`\tExpected: ${t.result}\n` +
|
||||||
`\tActual: ${result.toISOString()}\n`
|
`\tActual: ${result.toISOString()}\n`
|
||||||
);
|
);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
// At this real UTC time, what does the timezone translate it to?
|
// At this real UTC time, what does the timezone translate it to?
|
||||||
[
|
[
|
||||||
//
|
//
|
||||||
// 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
|
||||||
{
|
{
|
||||||
desc: "UTC to 12:15am NY EST",
|
desc: "UTC to 12:15am NY EST",
|
||||||
inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
|
inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
|
||||||
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");
|
||||||
|
|
|
||||||
BIN
xtz-preview.png
BIN
xtz-preview.png
Binary file not shown.
|
Before Width: | Height: | Size: 80 KiB |
347
xtz.js
347
xtz.js
|
|
@ -1,179 +1,182 @@
|
||||||
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,
|
||||||
};
|
};
|
||||||
|
|
||||||
var tzOptions = Object.assign({ timeZoneName: "long" }, options);
|
if ("undefined" != typeof module && module.exports) {
|
||||||
|
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);
|
|
||||||
}
|
|
||||||
// ex: 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