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14 Commits
de3f74a572 ... 5c35bd2148

Author SHA1 Message Date
AJ ONeal 5c35bd2148 fix typo, clarify comment 2021-05-28 08:37:35 -06:00
AJ ONeal 8b8af276ef add build command 2021-05-28 08:28:18 -06:00
AJ ONeal 72f68a10f0 fix bad description 2021-05-28 08:28:01 -06:00
AJ ONeal 4de76c4ccc fix typo: 2nd 2am => 2nd 1am 2021-05-28 08:08:53 -06:00
AJ ONeal dea25807e0 make current time copy/paste easier 2021-05-28 02:16:33 -06:00
AJ ONeal 6d6635b838 1.0.1 2021-05-28 02:14:17 -06:00
AJ ONeal 7ea37d8772 typo fix 2021-05-28 02:14:13 -06:00
AJ ONeal 37181d65a0 bugfix: respect updated tz values 2021-05-28 02:09:15 -06:00
AJ ONeal 77300f69b2 add demo link 2021-05-28 02:04:29 -06:00
AJ ONeal dacf0eaaf2 update docs with demo 2021-05-28 02:03:49 -06:00
AJ ONeal a0172f68a3 add demo page 2021-05-28 01:55:01 -06:00
AJ ONeal ff9e266052 make Prettier 2021-05-28 00:57:42 -06:00
AJ ONeal aaa31a25b9 note tests 2021-05-28 00:51:14 -06:00
AJ ONeal 8ddd8cd2f5 update cdn link, put browser first 2021-05-28 00:42:21 -06:00
9 changed files with 763 additions and 580 deletions
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*.min.js

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{
"printWidth": 80,
"tabWidth": 2,
"singleQuote": false,
"bracketSpacing": true,
"semi": true
}

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# [xtz.js](https://github.com/therootcompany/tz.js) # [xtz.js](https://github.com/therootcompany/tz.js)
A fast, lightweight, zero-dependency library to A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native `Intl.DateTimeFormat`
translate between Time Zones and UTC with native in ~100 LoC. For Node.js & Browsers.
`Intl.DateTimeFormat` in ~100 LoC. For Node.js & Browsers.
XTZ is a poor man's Temporal polyfill, but just for time zones. [![](./xtz-preview.png)](https://therootcompany.github.io/tz.js/)
XTZ is a poor man's `Temporal` polyfill, but just for time zones. \
Demo: <https://therootcompany.github.io/tz.js/>
> What UTC time will it be when it's 3:15am in New York? > What UTC time will it be when it's 3:15am in New York?
@ -17,7 +19,7 @@ TZ.toUTCISOString("2021-11-07 03:15:59.000", "America/New_York");
```js ```js
var tzDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York"); var tzDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
// { // {
// year: 2021, month: 11, day: 7, // year: 2021, month: 10, day: 7,
// hour: 3, minute: 15, second: 59, millisecond: 0, // hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -300, timeZoneName: "Eastern Standard Time" // offset: -300, timeZoneName: "Eastern Standard Time"
// } // }
@ -38,7 +40,7 @@ TZ.toTimeZoneISOString("2021-03-14T07:15:59.000Z", "America/New_York");
```js ```js
var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York"); var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York");
// { // {
// year: 2021, month: 3, day: 14, // year: 2021, month: 2, day: 14,
// hour: 3, minute: 15, second: 59, millisecond: 0, // hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -240, timeZoneName: "Eastern Daylight Time" // offset: -240, timeZoneName: "Eastern Daylight Time"
// } // }
@ -50,15 +52,26 @@ utcDate.toISOString();
# Features # Features
- [x] Translate a UTC time to a Time Zone - [x] Translate a UTC time to a Time Zone
- [x] Translate a Zoned time to UTC - [x] Translate a Zoned time to UTC
- [x] Handles **Daylight Savings**, Weird Time Zones, etc... - [x] Handles **Daylight Savings**, Weird Time Zones, etc...
- [x] Lightweight (No deps) - [x] Well-tested `npm run test`
- 5kb Source + Comments - [x] Lightweight (No deps)
- 2.5kb Minified - 5kb Source + Comments
- <1kb `gzip`d - 2.5kb Minified
- <1kb `gzip`d
Compatible with Node.js & Browsers. Compatible with Browsers, and Node.js.
## Browsers
```html
<script src="https://unpkg.com/xtz@latest/xtz.min.js"></script>
```
```js
var TZ = window.XTZ;
```
## Node.js & Webpack ## Node.js & Webpack
@ -70,28 +83,22 @@ npm install --save xtz
var TZ = require("xtz"); var TZ = require("xtz");
``` ```
## Browsers ## Demo
```html See <https://therootcompany.github.io/tz.js/>.
<script src="https://unpkg.com/xtz@1.0.0-rc.1/xtz.min.js"></script>
```
```js
var TZ = window.XTZ;
```
# API # API
- `toTimeZone(utcDate, timeZone)` - `toTimeZone(utcDate, timeZone)`
- `toTimeZoneISOString(isoString, timeZone)` - `toTimeZoneISOString(isoString, timeZone)`
- `toUTC(dtString, timeZone)` - `toUTC(dtString, timeZone)`
- `toUTCISOString(dtString, timeZone)` - `toUTCISOString(dtString, timeZone)`
## `toTimeZone(utcDate, timeZone)` ## `toTimeZone(utcDate, timeZone)`
> Convert UTC into a Target Time Zone > Convert UTC into a Target Time Zone
Use ISO timestamps representing the absolute UTC time in the target time zone: Use ISO timestamps representing the absolute UTC time (with or without offset):
```txt ```txt
"2021-11-07T08:15:59.000Z" "2021-11-07T08:15:59.000Z"
@ -114,8 +121,8 @@ You can also use a date object with an absolute UTC time:
```js ```js
var tzDate = TZ.toTimeZone( var tzDate = TZ.toTimeZone(
new Date("2021-11-07T08:15:59.000Z"), new Date("2021-11-07T08:15:59.000Z"),
"America/New_York" "America/New_York"
); );
``` ```
@ -138,7 +145,7 @@ 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 T03:15:59.000" "2021-11-0 03:15:59.000"
``` ```
Convert directly to an offset ISO String: Convert directly to an offset ISO String:
@ -154,12 +161,13 @@ 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 zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support). 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).
```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"
); );
``` ```
@ -172,30 +180,32 @@ utcDate.toISOString();
> In 2021 Daylight Savings (in the US) > In 2021 Daylight Savings (in the US)
> >
> - begins at 2am on March 14th > - begins at 2am on March 14th (skips to 3am)
> - ends at 2am on November 7th > - ends at 2am on November 7th (resets to 1am)
> >
> 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 is an hour early in real ("tick-tock" or "monotonic") time. - A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which
```js is an hour early in real ("tick-tock" or "monotonic") time.
var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York"); ```js
utcDate.toISOString(); var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
// "2021-03-14T02:15:59.000-0400" utcDate.toISOString();
// (same as "2021-03-14T01:15:59.000-0500") // "2021-03-14T02:15:59.000-0400"
``` // (same as "2021-03-14T01:15:59.000-0500")
```
Q: What happens in November when 2am happens twice? Q: What happens in November when 1am happens twice?
- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time with this library. - A: Although both 1ams are distinguishable with ISO offset times, only the first can be resolved from a local time
```js with this library.
var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York"); ```js
utcDate.toISOString(); var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
// "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z" utcDate.toISOString();
// (an hour before the 2nd 2am at "2021-11-07T01:15:59.000-0500") // "2021-11-07T01:15:59.000-0400", same as "2021-11-07T05:15:59.000Z"
``` // (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
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@ -1,89 +1,81 @@
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( console.info(`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`);
`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")` console.info(`\ttzDate.toISOString()`);
); tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
console.info(`\ttzDate.toISOString()`); console.info(
tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York"); "\t" + tzDate.toISOString(),
console.info( "// same as",
"\t" + tzDate.toISOString(), new Date(tzDate.toISOString()).toISOString()
"// same as", );
new Date(tzDate.toISOString()).toISOString() console.info();
);
console.info();
console.info("\t// during standard time"); console.info("\t// during standard time");
console.info( console.info(`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`);
`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")` console.info(`\ttzDate.toISOString()`);
); tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
console.info(`\ttzDate.toISOString()`); console.info(
tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York"); "\t" + tzDate.toISOString(),
console.info( "// same as",
"\t" + tzDate.toISOString(), new Date(tzDate.toISOString()).toISOString()
"// same as", );
new Date(tzDate.toISOString()).toISOString() console.info();
); }
console.info();
}
// //
// Time Zone-relative time translated to UTC // Time Zone-relative time translated to UTC
// //
function demo2() { function demo2() {
console.info( console.info("What time is it in New York at 8:15am on March 14th UTC?");
"What time is it in New York at 8:15am on March 14th UTC?" console.info();
);
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( console.info(`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`);
`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")` console.info(`\ttzDate.toISOString()`);
); tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
console.info(`\ttzDate.toISOString()`); console.info(
tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York"); "\t" + tzDate.toISOString(),
console.info( "// same as",
"\t" + tzDate.toISOString(), new Date(tzDate.toISOString()).toISOString()
"// same as", );
new Date(tzDate.toISOString()).toISOString() console.info();
); }
console.info();
}
demo1(); demo1();
demo2(); demo2();
})(); })();

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<!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>

5
package.json
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@ -1,10 +1,11 @@
{ {
"name": "xtz", "name": "xtz",
"version": "1.0.0", "version": "1.0.1",
"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
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@ -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");

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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);
}
// 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;
}
})();