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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)
A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native `Intl.DateTimeFormat`
in ~100 LoC. For Node.js & Browsers.
A fast, lightweight, zero-dependency library to
translate between Time Zones and UTC with native
`Intl.DateTimeFormat` in ~100 LoC. For Node.js & Browsers.
[![](./xtz-preview.png)](https://therootcompany.github.io/tz.js/)
XTZ is a poor man's Temporal polyfill, but just for time zones.
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?
```js
// What's the current time, in ISO+Offset format?
TZ.toLocalISOString(new Date()); // "2021-11-07T03:15:59.000-0500"
TZ.timeZone(); // "America/New_York"
```
```js
// What will the ISO+Offset datetime string be
// when it's 3:15am in New York?
//
// (Relative New York time to Absolute ISO+Offset Time)
TZ.toOffsetISOString("2021-11-07 03:15:59.000", "America/New_York");
// Relative New York time to Absolute UTC Time
TZ.toUTCISOString("2021-11-07 03:15:59.000", "America/New_York");
// "2021-11-07T03:15:59.000-0500"
```
```js
// What time will it be in New York
// when it's 7:15am UTC?
//
// (Absolute UTC Zulu time to Relative New York time)
var tzDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
// {
// year: 2021, month: 11, day: 7,
// hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -300, timeZoneName: "Eastern Standard Time"
// }
TZ.toTimeZoneISOString("2021-03-14T07:15:59.000Z", "America/New_York");
tzDate.toISOString();
// "2021-11-07T03:15:59.000-0500"
// same as "2021-11-07T08:15:59.000Z"
```
> What time will it be in New York when it's 7:15am UTC?
```js
// Absolute UTC time to Relative New York time
TZ.toTimeZoneISOString("2021-11-07T07:15:59.000Z", "America/New_York");
// "2021-11-07T03:15:59.000-0400"
```
```js
var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York");
// {
// year: 2021, month: 3, day: 14,
// hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -240, timeZoneName: "Eastern Daylight Time"
// }
utcDate.toISOString();
// "2021-03-14T03:15:59.000-0400"
// same as "2021-11-07T07:15:59.000Z"
```
# Features
- [x] Translate a UTC Zulu time to a Time Zone
- [x] Translate a Zoned time to ISO+Offset
- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
- [x] Well-tested `npm run test`
- [x] Lightweight (No deps)
- 5kb Source + Comments
- 2.5kb Minified
- <1kb `gzip`d
- [x] Translate a UTC time to a Time Zone
- [x] Translate a Zoned time to UTC
- [x] Handles **Daylight Savings**, Weird Time Zones, etc...
- [x] Lightweight (No deps)
- 5kb Source + Comments
- 2.5kb Minified
- <1kb `gzip`d
Compatible with Browsers, and Node.js.
## Browsers
```html
<script src="https://unpkg.com/xtz@latest/xtz.min.js"></script>
```
```js
var TZ = window.XTZ;
```
Compatible with Node.js & Browsers.
## Node.js & Webpack
@ -68,69 +70,52 @@ npm install --save xtz
var TZ = require("xtz");
```
## Demo
## Browsers
See <https://therootcompany.github.io/tz.js/>.
```html
<script src="https://unpkg.com/xtz@1.0.0-rc.1/xtz.min.js"></script>
```
## How was this built?
I live-streamed the creation of this entire project.
If you'd like to learn how I did it and what challenges I encountered, you can watch here:
https://www.youtube.com/playlist?list=PLxki0D-ilnqa6horOJ2G18WMZlJeQFlAt
(though there have been a few minor updates and bug fixes off-camera)
```js
var TZ = window.XTZ;
```
# API
- `toLocalISOString(dateOrNull)`
- `toTimeZone(utcDate, timeZone)`
- `toTimeZoneISOString(isoString, timeZone)`
- `fromTimeZone(dtString, timeZone)`
- `toOffsetISOString(dtString, timeZone)`
- `toTimeZone(utcDate, timeZone)`
- `toTimeZoneISOString(isoString, timeZone)`
- `toUTC(dtString, timeZone)`
- `toUTCISOString(dtString, timeZone)`
## `toTimeZone(utcDate, timeZone)`
> Convert UTC into a Target Time Zone
Use ISO timestamps representing the absolute UTC time (ISO with or without offset):
Use ISO timestamps representing the absolute UTC time in the target time zone:
```txt
"2021-11-07T08:15:59.000Z"
```
```js
var utcDate = TZ.toTimeZone("2021-03-14T07:15:59.000Z", "America/New_York");
// {
// year: 2021, month: 2, day: 14,
// hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -240, timeZoneName: "Eastern Daylight Time"
// }
utcDate.toISOString();
// "2021-03-14T03:15:59.000-0400"
// (same as "2021-11-07T07:15:59.000Z")
```
### Convert directly to an ISO String:
Convert directly to an ISO String:
```js
TZ.toTimeZoneISOString("2021-11-07T08:15:59.000Z", "America/New_York");
// "2021-11-07T03:15:59.000-0500"
```
### Or use our bespoke (custom) date object:
Or use our bespoke (custom) date object:
```js
var tzDate = TZ.toTimeZone("2021-11-07T08:15:59.000Z", "America/New_York");
```
### You can also use a date object with an absolute ISO time:
You can also use a date object with an absolute UTC time:
```js
var tzDate = TZ.toTimeZone(
new Date("2021-11-07T08:15:59.000Z"),
"America/New_York"
new Date("2021-11-07T08:15:59.000Z"),
"America/New_York"
);
```
@ -139,58 +124,42 @@ console.log(tzDate.toISOString());
// "2021-11-07T03:15:59.000-0500"
```
### Our ISO Strings + Offsets work with JavaScript's native Date object!!
Our ISO Strings + Offsets work with JavaScript's native Date object!!
```js
new Date("2021-11-07T03:15:59.000-0500").toISOString());
// "2021-11-07T08:15:59.000Z"
```
## `fromTimeZone(dtString, timeZone)`
## `toUTC(dtString, timeZone)`
> Convert a Target Time Zone into ISO
> Convert a Target Time Zone into UTC
Use ISO-like timestamps representing the _local_ time in the target time zone:
```txt
"2021-11-0 03:15:59.000"
"2021-11-0 T03:15:59.000"
```
```js
var tzDate = TZ.fromTimeZone("2021-11-07 03:15:59.000", "America/New_York");
// {
// year: 2021, month: 10, day: 7,
// hour: 3, minute: 15, second: 59, millisecond: 0,
// offset: -300, timeZoneName: "Eastern Standard Time"
// }
tzDate.toISOString();
// "2021-11-07T03:15:59.000-0500"
// (same as "2021-11-07T08:15:59.000Z")
```
### Convert directly to an offset ISO String:
Convert directly to an offset ISO String:
```js
TZ.toOffsetISOString("2021-11-07 03:15:59.000", "America/New_York");
TZ.toUTCISOString("2021-11-07 03:15:59.000", "America/New_York");
// "2021-11-07T03:15:59.000-0500"
```
### Or our bespoke date object:
Or our bespoke date object:
```js
var utcDate = TZ.fromTimeZone("2021-11-07 03:15:59.000", "America/New_York");
var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
```
### Use a Date as a source 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).
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
var utcDate = TZ.fromTimeZone(
new Date("2021-11-07T03:15:59.000Z"),
"America/New_York"
var utcDate = TZ.toUTC(
new Date("2021-11-07T03:15:59.000Z"),
"America/New_York"
);
```
@ -203,32 +172,30 @@ utcDate.toISOString();
> In 2021 Daylight Savings (in the US)
>
> - begins at 2am on March 14th (skips to 3am)
> - ends at 2am on November 7th (resets to 1am)
> - begins at 2am on March 14th
> - ends at 2am on November 7th
>
> See <https://www.timeanddate.com/time/change/usa>.
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.
```js
var utcDate = TZ.fromTimeZone("2021-03-14 02:15:59.000", "America/New_York");
utcDate.toISOString();
// "2021-03-14T02:15:59.000-0400"
// (same as "2021-03-14T01:15:59.000-0500")
```
- 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.
```js
var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
utcDate.toISOString();
// "2021-03-14T02:15:59.000-0400"
// (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
with this library.
```js
var utcDate = TZ.fromTimeZone("2021-11-07 01:15:59.000", "America/New_York");
utcDate.toISOString();
// "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")
```
- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time with this library.
```js
var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
utcDate.toISOString();
// "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")
```
# List of Time Zones
@ -241,7 +208,6 @@ America/New_York -0500
America/Denver -0700
America/Phoenix -0700 (No DST)
America/Los_Angeles -0800
UTC Z
Australia/Adelaide +0930 (30-min, has DST)
Asia/Kathmandu +0545 (No DST, 45-min)
Asia/Kolkata +0530 (No DST, 30-min)

142
examples.js
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@ -1,81 +1,89 @@
var XTZ;
(function () {
"use strict";
"use strict";
if (!XTZ) {
try {
XTZ = require("xtz");
} catch (e) {
XTZ = require("./xtz.js");
if (!XTZ) {
try {
XTZ = require("xtz");
} catch (e) {
XTZ = require("./xtz.js");
}
}
}
var TZ = XTZ;
var tzDate;
var TZ = XTZ;
var tzDate;
//
// UTC-absolute time translated to a Time Zone
//
function demo1() {
console.info("What's the UTC equivalent of 8:15am in New York?");
console.info();
//
// UTC-absolute time translated to a Time Zone
//
function demo1() {
console.info("What's the UTC equivalent of 8:15am in New York?");
console.info();
console.info("\t// during daylight savings");
console.info(`\tXTZ.fromTimeZone("2021-03-14 08:15:59.000", "America/New_York")`);
console.info(`\ttzDate.toISOString()`);
tzDate = XTZ.fromTimeZone("2021-03-14 08:15:59.000", "America/New_York");
console.info(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
console.info("\t// during daylight savings");
console.info(
`\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(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
console.info("\t// during standard time");
console.info(`\tXTZ.fromTimeZone("2021-11-07 08:15:59.000", "America/New_York")`);
console.info(`\ttzDate.toISOString()`);
tzDate = XTZ.fromTimeZone("2021-11-07 08:15:59.000", "America/New_York");
console.info(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
}
console.info("\t// during standard time");
console.info(
`\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(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
}
//
// Time Zone-relative time translated to UTC
//
function demo2() {
console.info("What time is it in New York at 8:15am on March 14th UTC?");
console.info();
//
// Time Zone-relative time translated to UTC
//
function demo2() {
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(
`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
);
console.info(`\ttzDate.toISOString()`);
tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
console.info(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
console.info("\t// during daylight savings");
console.info(
`\tXTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York")`
);
console.info(`\ttzDate.toISOString()`);
tzDate = XTZ.toTimeZone("2021-03-14T08:15:59.000Z", "America/New_York");
console.info(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
console.info("\t// during standard time");
console.info(`\tXTZ.fromTimeZone("2021-11-07T08:15:59.000Z", "America/New_York")`);
console.info(`\ttzDate.toISOString()`);
tzDate = XTZ.fromTimeZone("2021-11-07T08:15:59.000Z", "America/New_York");
console.info(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
}
console.info("\t// during standard time");
console.info(
`\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(
"\t" + tzDate.toISOString(),
"// same as",
new Date(tzDate.toISOString()).toISOString()
);
console.info();
}
demo1();
demo2();
demo1();
demo2();
})();

276
index.html
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@ -1,276 +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>
<pre><code>new Intl.DateTimeFormat().resolvedOptions().timeZone;</code></pre>
Current Time Zone: <span class="js-my-tz">America/XXXX</span>
<br />
<pre><code>String(((new Date()).getTimezoneOffset() / 60)).padStart(2, '0') +
String(((new Date()).getTimezoneOffset() % 60)).padStart(2, '0')</code></pre>
Current Time Offset: <span class="js-my-offset">-0000</span>
<hr />
<form class="js-tz2tz">
<h3>Convert Between Time Zones:</h3>
<label>
Time:
<input
class="js-dt-xtz"
type="text"
placeholder="ex: 2021-03-14 03:15:69.000"
required
/>
</label>
<br />
<label>
Input Zone:
<input
class="js-tz1-xtz"
type="text"
placeholder="ex: UTC or America/New_York"
required
/>
</label>
<br />
<label>
Output Zone:
<input
class="js-tz2-xtz"
type="text"
placeholder="ex: America/Los_Angeles or UTC"
required
/>
</label>
<br />
<label>
ISO:
<input class="js-my-dt-xtz" type="text" disabled />
</label>
<br />
<br />
<button type="submit">Convert between Zones!</button>
<br />
</form>
<hr />
<form class="js-local">
<h3>Local ISO+Offset String:</h3>
<pre><code>XTZ.toLocalISOString(new Date())</code></pre>
<label>
ISO:
<input class="js-my-dt-local" type="text" disabled />
</label>
<br />
</form>
<hr />
<form class="js-tz2utc">
<h3>TimeZone-Relative (Local) to Absolute (ISO+Offset) String:</h3>
<pre><code>XTZ.fromTimeZone("<span class="js-dtx-tz">YYYY-03-14 03:15:69.000</span>", "<span class="js-tzx-tz">UTC</span>")
.toISOString()
// <span class="js-myx-dt-tz"></span></code></pre>
<label>
Time:
<input
class="js-dt-tz"
type="text"
placeholder="ex: 2021-03-14 03:15:69.000"
required
/>
</label>
<br />
<label>
Input 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 ISO+Offset!</button>
<br />
</form>
<hr />
<form class="js-utc2tz">
<h3>Absolute (UTC) to TimeZone-Relative (ISO+Offset) String:</h3>
<pre><code>XTZ.toTimeZone("<span class="js-dtx-utc">YYYY-03-14 03:15:69.000</span>", "<span class="js-tzx-utc">UTC</span>")
.toISOString()
// <span class="js-myx-dt-utc"></span></code></pre>
<label>
Time:
<input
class="js-dt-utc"
type="text"
placeholder="ex: 2021-03-14 03:15:69.000"
required
/>
</label>
<br />
<label>
Output 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)
UTC Z (UTC "Zulu" 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 src="./tolocalisostring.js"></script>
<script>
function $(sel, el) {
return (el || document.body).querySelector(sel);
}
function translate(dt, tz, tz2) {
var utc = new Date(XTZ.fromTimeZone(dt, tz).toISOString());
if (!tz2) {
return utc;
}
return XTZ.toTimeZone(utc, tz2);
}
function fromTimeZone() {
var curDt = $(".js-dt-tz").value;
var curTz = $(".js-tz-tz").value;
$(".js-my-dt-tz").value = XTZ.fromTimeZone(curDt, curTz).toISOString();
$(".js-dtx-tz").innerText = curDt;
$(".js-tzx-tz").innerText = curTz;
$(".js-myx-dt-tz").innerText = $(".js-my-dt-tz").value;
}
function toTZ() {
var curDt = $(".js-dt-utc").value;
var curTz = $(".js-tz-utc").value;
$(".js-my-dt-utc").value = XTZ.toTimeZone(curDt, curTz).toISOString();
$(".js-dtx-utc").innerText = curDt;
$(".js-tzx-utc").innerText = curTz;
$(".js-myx-dt-utc").innerText = $(".js-my-dt-utc").value;
}
function xTZ() {
var curDt = $(".js-dt-xtz").value;
var inTz = $(".js-tz1-xtz").value;
var outTz = $(".js-tz2-xtz").value;
$(".js-my-dt-xtz").value = translate(curDt, inTz, outTz).toISOString();
}
$(".js-my-dt-local").value = XTZ.toLocalISOString();
var myTz = new Intl.DateTimeFormat("default", {}).resolvedOptions()
.timeZone;
$(".js-my-tz").innerText = myTz;
$(".js-tz-tz").value = myTz;
$(".js-tz-utc").value = myTz;
$(".js-tz1-xtz").value = myTz;
$(".js-tz2-xtz").value = "Asia/Kathmandu";
var myOffset = -1 * new Date().getTimezoneOffset();
$(".js-my-offset").innerText =
XTZ.formatOffset(myOffset) + " (" + myOffset + ")";
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-xtz").value = $(".js-dt-tz").value;
$(".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();
fromTimeZone();
});
fromTimeZone();
toTZ();
xTZ();
</script>
</body>
</html>

9
package.json
View File

@ -1,15 +1,10 @@
{
"name": "xtz",
"version": "1.3.2",
"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.",
"main": "xtz.js",
"files": [
"xtz.js",
"tolocalisostring.js"
],
"scripts": {
"test": "node ./test.js",
"build": "uglifyjs ./xtz.js > ./xtz.min.js ; gzip -k -f ./xtz.min.js"
"test": "node ./test.js"
},
"repository": {
"type": "git",

576
test.js
View File

@ -3,332 +3,314 @@
var TZ = require("./");
function testUtcToTz(t) {
var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
var result2 = TZ.toTimeZoneISOString.apply(TZ, t.inputs);
if (result !== result2 || t.result !== result) {
throw new Error(
`Invalid UTC/ISO+Offset to TZ conversion for ${t.desc}:\n` +
`\tExpected: ${t.result}\n` +
`\tActual: ${result}\n`
);
}
var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
if (t.result !== result) {
throw new Error(
`Invalid UTC to TZ conversion for ${t.desc}:\n` +
`\tExpected: ${t.result}\n` +
`\tActual: ${result}\n`
);
}
}
function testTzToUtc(t) {
var result = TZ.fromTimeZone.apply(TZ, t.inputs).toISOString();
var result2 = TZ.toOffsetISOString.apply(TZ, t.inputs);
var result3 = TZ.toUTC.apply(TZ, t.inputs).toISOString();
if (t.result !== result || t.result !== result2 || t.result !== result3) {
console.error(result);
throw new Error(
`Invalid TZ to UTC conversion for ${t.desc}:\n` +
`\tExpected: ${t.result}\n` +
`\tActual: ${result.toISOString()}\n`
);
}
var result = TZ.toUTC.apply(TZ, t.inputs);
if (t.result !== result.toISOString()) {
console.log(result);
throw new Error(
`Invalid TZ to UTC conversion for ${t.desc}:\n` +
`\tExpected: ${t.result}\n` +
`\tActual: ${result.toISOString()}\n`
);
}
}
// At this real UTC time, what does the timezone translate it to?
[
//
// Start-of-DST Tests
//
//
// Start-of-DST Tests
//
// [Start]
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
// // 2021-03-14T01:15:59.000-0500
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
// // 2021-03-14T04:15:59.000-0400
// [End]
// [Start]
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
// // 2021-03-14T01:15:59.000-0500
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
// // 2021-03-14T04:15:59.000-0400
// [End]
// 12:15am NY -0500 => -0400
{
desc: "UTC Zulu to 12:15am NY EST",
inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
{
desc: "ISO+Offset to 12:15am NY EST (2)",
inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
// 1:15am NY (non-DST)
{
desc: "UTC Zulu to 1:15am NY EST",
inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
{
desc: "ISO+Offset to 1:15am NY EST (2)",
inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
// 12:15am NY -0500 => -0400
{
desc: "UTC to 12:15am NY EST",
inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
{
desc: "UTC to 12:15am NY EST (2)",
inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
// 1:15am NY (non-DST)
{
desc: "UTC to 1:15am NY EST",
inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
{
desc: "UTC to 1:15am NY EST (2)",
inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
// 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)
{
desc: "UTC Zulu to 3:15am NY EDT",
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
{
desc: "ISO+Offset to 3:15am NY EDT (2)",
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
// 4:15am NY
{
desc: "UTC Zulu to 4:15am NY EDT",
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
{
desc: "ISO+Offset to 4:15am NY EDT (2)",
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
// 3:15am NY (DST)
{
desc: "UTC to 3:15am NY EDT",
inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
{
desc: "UTC to 3:15am NY EDT (2)",
inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
// 4:15am NY
{
desc: "UTC to 4:15am NY EDT",
inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
{
desc: "UTC to 4:15am NY EDT (2)",
inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
//
// End-of-DST Tests
//
//
// End-of-DST Tests
//
// [Start]
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
// // 2021-11-07T01:15:59.000-0400
// // 2021-11-07 06:15:59.000
// // 2021-11-07T01:15:59.000-0500
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
// // 2021-11-07T02:15:59.000-0500
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
// [End]
// [Start]
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
// // 2021-11-07T01:15:59.000-0400
// // 2021-11-07 06:15:59.000
// // 2021-11-07T01:15:59.000-0500
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
// // 2021-11-07T02:15:59.000-0500
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
// [End]
// 12:15am NY -0400 => -0500
{
desc: "UTC Zulu to 2021 Nov 7, 12:15am NY EDT",
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
{
desc: "ISO+Offset to 2021 Nov 7, 12:15am NY EDT (2)",
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
// 1:15am NY (DST) -0400
// NOTE: 1:15am happens TWICE (with different offsets)
{
desc: "UTC Zulu to 2021 Nov 7, 1:15am NY EDT",
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400",
},
{
desc: "ISO+Offset to 2021 Nov 7, 1:15am NY EDT (2)",
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400",
},
// 1:15am NY (non-DST) -0500
{
desc: "UTC Zulu to 2021 Nov 7, 1:15am NY EST",
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
result: "2021-11-07T01:15:59.000-0500",
},
{
desc: "ISO+Offset to 2021 Nov 7, 1:15am NY EST (2)",
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
result: "2021-11-07T01:15:59.000-0500",
},
// 2:15am NY -0500
{
desc: "UTC Zulu to 2021 Nov 7, 2:15am NY EST",
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
{
desc: "ISO+Offset to 2021 Nov 7, 2:15am NY EST (2)",
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
// 3:15am NY
{
desc: "UTC Zulu to 2021 Nov 7, 3:15am NY EST",
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
{
desc: "ISO+Offset to 2021 Nov 7, 3:15am NY EST (2)",
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
// 12:15am NY -0400 => -0500
{
desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
{
desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
// 1:15am NY (DST) -0400
// NOTE: 1:15am happens TWICE (with different offsets)
{
desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400",
},
{
desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400",
},
// 1:15am NY (non-DST) -0500
{
desc: "UTC to 2021 Nov 7, 1:15am NY EST",
inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
result: "2021-11-07T01:15:59.000-0500",
},
{
desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
result: "2021-11-07T01:15:59.000-0500",
},
// 2:15am NY -0500
{
desc: "UTC to 2021 Nov 7, 2:15am NY EST",
inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
{
desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
// 3:15am NY
{
desc: "UTC to 2021 Nov 7, 3:15am NY EST",
inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
{
desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
//
// Positive Offset Test
//
//
// Positive Offset Test
//
// Colombo +0530 (not DST)
{
desc: "UTC Zulu to Asia/Colombo (1)",
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
desc: "ISO+Offset to Asia/Colombo (2)",
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
desc: "UTC Zulu to Asia/Colombo (3)",
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
{
desc: "ISO+Offset to Asia/Colombo (4)",
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
// Colombo +0530 (not DST)
{
desc: "UTC to Asia/Colombo (1)",
inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
desc: "UTC to Asia/Colombo (2)",
inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
desc: "UTC to Asia/Colombo (3)",
inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
{
desc: "UTC to Asia/Colombo (4)",
inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
].forEach(testUtcToTz);
console.info(
"Pass: UTC/ISO+Offset 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]
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
// // 2021-03-14T01:15:59.000-0500
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
// // 2021-03-14T04:15:59.000-0400
// [End]
// [Start]
// What time is '2021-03-14 01:15:59.000 in New York' in UTC? // 2021-03-14 06:15:59.000
// // 2021-03-14T01:15:59.000-0500
// What time is '2021-03-14 02:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 03:15:59.000 in New York' in UTC? // 2021-03-14 07:15:59.000
// // 2021-03-14T03:15:59.000-0400
// What time is '2021-03-14 04:15:59.000 in New York' in UTC? // 2021-03-14 08:15:59.000
// // 2021-03-14T04:15:59.000-0400
// [End]
// 12:15am NY -0500 => -0400
{
// 2021-03-14T05:15:59.000Z
desc: "2021 Mar 14, 12:15am NY EST to UTC",
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
// 1:15am NY (non-DST)
{
// 2021-03-14T06:15:59.000Z
desc: "2021 Mar 14, 1:15am NY EST to UTC",
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
// 12:15am NY -0500 => -0400
{
// 2021-03-14T05:15:59.000Z
desc: "2021 Mar 14, 12:15am NY EST to UTC",
inputs: ["2021-03-14 00:15:59.000", "America/New_York"],
result: "2021-03-14T00:15:59.000-0500",
},
// 1:15am NY (non-DST)
{
// 2021-03-14T06:15:59.000Z
desc: "2021 Mar 14, 1:15am NY EST to UTC",
inputs: ["2021-03-14 01:15:59.000", "America/New_York"],
result: "2021-03-14T01:15:59.000-0500",
},
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
// This test is here to document the "undefined" behavior
{
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
// would be reasonable substitutions, I think
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
inputs: ["2021-03-14 02:15:59.000", "America/New_York"],
//result: "2021-03-14T01:15:59.000-0500", // 2021-03-14T06:15:59.000Z
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
},
// NOTE: Can't 2:15am NY, because it does not exist (skipped by DST)
// This test is here to document the "undefined" behavior
{
// Both 2021-03-14T06:15:59.000Z and 2021-03-14T07:15:59.000Z
// would be reasonable substitutions, I think
desc: "2021 Mar 14, 2:15am NY ExT to UTC",
inputs: ["2021-03-14 02:15:59.000", "America/New_York"],
//result: "2021-03-14T01:15:59.000-0500", // 2021-03-14T06:15:59.000Z
result: "2021-03-14T02:15:59.000-0400", // 2021-03-14T06:15:59.000Z
//result: "2021-03-14T02:15:59.000-0500", // 2021-03-14T07:15:59.000Z
},
// 3:15am NY (DST)
{
// 2021-03-14T07:15:59.000Z
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
// 4:15am NY
{
// 2021-03-14T08:15:59.000Z
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
// 3:15am NY (DST)
{
// 2021-03-14T07:15:59.000Z
desc: "2021 Mar 14, 3:15am NY EDT to UTC",
inputs: ["2021-03-14 03:15:59.000", "America/New_York"],
result: "2021-03-14T03:15:59.000-0400",
},
// 4:15am NY
{
// 2021-03-14T08:15:59.000Z
desc: "2021 Mar 14, 4:15am NY EDT to UTC",
inputs: ["2021-03-14 04:15:59.000", "America/New_York"],
result: "2021-03-14T04:15:59.000-0400",
},
//
// End-of-DST Tests
//
//
// End-of-DST Tests
//
// [Start]
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
// // 2021-11-07T01:15:59.000-0400
// // 2021-11-07 06:15:59.000
// // 2021-11-07T01:15:59.000-0500
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
// // 2021-11-07T02:15:59.000-0500
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
// [End]
// [Start]
// What time is '2021-11-07 01:15:59.000 in New York' in UTC? // 2021-11-07 05:15:59.000
// // 2021-11-07T01:15:59.000-0400
// // 2021-11-07 06:15:59.000
// // 2021-11-07T01:15:59.000-0500
// What time is '2021-11-07 02:15:59.000 in New York' in UTC? // 2021-11-07 07:15:59.000
// // 2021-11-07T02:15:59.000-0500
// What time is '2021-11-07 03:15:59.000 in New York' in UTC? // 2021-11-07 08:15:59.000
// [End]
// 12:15am NY -0400 => -0500
{
// 2021-11-07T04:15:59.000Z
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
// 12:15am NY -0400 => -0500
{
// 2021-11-07T04:15:59.000Z
desc: "2021 Nov 7, 12:15am NY EDT to UTC",
inputs: ["2021-11-07 00:15:59.000", "America/New_York"],
result: "2021-11-07T00:15:59.000-0400",
},
// 1:15am NY (DST) -0400
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
{
// ==> 2021-11-07T05:15:59.000Z
// [Skip] 2021-11-07T06:15:59.000Z
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
inputs: ["2021-11-07 01:15:59.000", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400", // 2021-11-07T05:15:59.000Z
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
},
// 1:15am NY (DST) -0400
// NOTE: 1:15am happens TWICE (with different offsets), so we skip one
{
// ==> 2021-11-07T05:15:59.000Z
// [Skip] 2021-11-07T06:15:59.000Z
desc: "2021 Nov 7, 1:15am NY ExT to UTC",
inputs: ["2021-11-07 01:15:59.000", "America/New_York"],
result: "2021-11-07T01:15:59.000-0400", // 2021-11-07T05:15:59.000Z
//result: "2021-11-07T01:15:59.000-0500", // 2021-11-07T06:15:59.000Z
},
// 2:15am NY -0500
{
// 2021-11-07T07:15:59.000Z
desc: "2021 Nov 7, 2:15am NY EST to UTC",
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
// 3:15am NY
{
// 2021-11-07T08:15:59.000Z
desc: "2021 Nov 7, 3:15am NY EST to UTC",
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
// 2:15am NY -0500
{
// 2021-11-07T07:15:59.000Z
desc: "2021 Nov 7, 2:15am NY EST to UTC",
inputs: ["2021-11-07 02:15:59.000", "America/New_York"],
result: "2021-11-07T02:15:59.000-0500",
},
// 3:15am NY
{
// 2021-11-07T08:15:59.000Z
desc: "2021 Nov 7, 3:15am NY EST to UTC",
inputs: ["2021-11-07 03:15:59.000", "America/New_York"],
result: "2021-11-07T03:15:59.000-0500",
},
//
// Positive Offset Test
//
//
// Positive Offset Test
//
// Colombo +0530 (not DST)
{
// 2021-03-14T08:15:59.000Z
desc: "Asia/Colombo to UTC (1)",
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
// 2021-03-14T08:15:59.000Z
desc: "Asia/Colombo to UTC (2)",
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
// Colombo +0530 (not DST)
{
// 2021-03-14T08:15:59.000Z
desc: "Asia/Colombo to UTC (1)",
inputs: ["2021-03-14 13:45:59.000", "Asia/Colombo"],
result: "2021-03-14T13:45:59.000+0530",
},
{
// 2021-03-14T08:15:59.000Z
desc: "Asia/Colombo to UTC (2)",
inputs: ["2021-11-07 13:45:59.000", "Asia/Colombo"],
result: "2021-11-07T13:45:59.000+0530",
},
].forEach(testTzToUtc);
console.info("Pass: TZ to UTC for America/New_York and Asia/Colombo");
var localISOString = TZ.toLocalISOString();
var reISOString = /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d[+-]\d\d\d\d$/;
if (!reISOString.test(localISOString)) {
throw new Error("Couldn't get local time as iso+offset");
}
console.info("Pass: can get local time as ISO+Offset");
var tzName = TZ.timeZone();
if (!/^[A-Z]\w+\/[A-Z]\w+$/.test(tzName)) {
throw new Error("Couldn't get local Time Zone");
}
console.info("Pass: can get local timezone");

50
tolocalisostring.js
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@ -1,50 +0,0 @@
(function (exports) {
"use strict";
// See <https://github.com/coolaj86/AJScript/issues/27>
function toLocalISOString(dateOrStr) {
var d;
if (dateOrStr) {
d = new Date(dateOrStr);
} else {
d = new Date();
}
var YYYY = d.getFullYear();
var MM = p2(d.getMonth() + 1);
var DD = p2(d.getDate());
var hh = p2(d.getHours());
var mm = p2(d.getMinutes());
var ss = p2(d.getSeconds());
var sss = d.getMilliseconds().toString().padStart(3, "0");
var offset = formatOffset(-d.getTimezoneOffset());
return `${YYYY}-${MM}-${DD}T${hh}:${mm}:${ss}.${sss}${offset}`;
}
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 + p2(h) + p2(m);
}
function p2(x) {
return String(x).padStart(2, "0");
}
exports.toLocalISOString = toLocalISOString;
})(("undefined" === typeof module && window) || exports);

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392
xtz.js
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@ -1,218 +1,182 @@
(function (exports) {
"use strict";
var XTZ;
function toTimeZone(date, timeZone) {
// ISO string or existing date object
date = new Date(date);
var options = {
timeZone: timeZone,
year: "numeric",
month: "numeric",
day: "numeric",
hour12: false,
hour: "numeric",
minute: "numeric",
second: "numeric",
fractionalSecondDigits: 3,
(function () {
"use strict";
function toTimeZone(date, timeZone) {
// ISO string or existing date object
date = new Date(date);
var options = {
timeZone: timeZone,
year: "numeric",
month: "numeric",
day: "numeric",
hour12: false,
hour: "numeric",
minute: "numeric",
second: "numeric",
fractionalSecondDigits: 3,
};
var tzOptions = Object.assign({ timeZoneName: "long" }, options);
// Every country uses the same year and months, right?
var formater = new Intl.DateTimeFormat("default", tzOptions);
var parts = formater.formatToParts(date);
var whole = {};
parts.forEach(function (part) {
var val = part.value;
switch (part.type) {
case "literal":
// ignore separators and whitespace characters
return;
case "timeZoneName":
// keep as is - it's a string
break;
case "month":
// months are 0-indexed for new Date()
val = parseInt(val, 10) - 1;
break;
case "hour":
// because sometimes 24 is used instead of 0, make 24 0
val = parseInt(val, 10) % 24;
break;
case "fractionalSecond":
// fractionalSecond is a dumb name - should be millisecond
whole.millisecond = parseInt(val, 10);
return;
default:
val = parseInt(val, 10);
}
// whole.month = 0;
whole[part.type] = val;
});
whole.timeZone = timeZone;
whole.offset = getOffset(date, whole);
whole.toISOString = _toOffsetISOString;
return whole;
}
function toTimeZoneISOString(date, timeZone) {
var whole = toTimeZone(date, timeZone);
return toOffsetISOString(whole);
}
function _toOffsetISOString() {
return toOffsetISOString(this);
}
function getOffset(utcDate, tzD2) {
var tzDate = new Date(toOffsetISOString(tzD2));
var diff =
Math.round(tzDate.valueOf() - utcDate.valueOf()) / (60 * 1000);
return diff;
}
function p2(x) {
return String(x).padStart(2, "0");
}
function p3(x) {
return String(x).padStart(3, "0");
}
function formatOffset(minutes) {
if (!minutes) {
return "Z";
}
var h = Math.floor(Math.abs(minutes) / 60);
var m = Math.abs(minutes) % 60;
var offset = "";
if (minutes > 0) {
offset = "+";
} else if (minutes < 0) {
offset = "-";
}
// +0500, -0730
return (
offset +
h.toString().padStart(2, "0") +
m.toString().padStart(2, "0")
);
}
function toOffsetISOString(d) {
var offset = formatOffset(d.offset);
return (
`${d.year}-${p2(d.month + 1)}-${p2(d.day)}` +
`T${p2(d.hour)}:${p2(d.minute)}:${p2(d.second)}.${p3(
d.millisecond
)}${offset}`
);
}
function toUTC(dt, tz) {
if ("string" === typeof dt) {
// Either of these formats should work:
// 2021-03-14 01:15:59
// 2021-03-14T01:15:59Z
dt = dt
.replace("T", " ")
.replace("Z", "")
.replace(" ", "T")
.replace(/$/, "Z");
}
var utcDate = new Date(dt);
var tzD2 = toTimeZone(utcDate, tz);
var offset = tzD2.offset;
tzD2.offset = "";
var deltaDate = new Date(utcDate);
deltaDate.setUTCMinutes(deltaDate.getUTCMinutes() - offset);
var tzD3 = toTimeZone(deltaDate, tz);
if (
tzD3.hour === utcDate.getUTCHours() &&
tzD3.minute === utcDate.getUTCMinutes()
) {
return tzD3;
}
var diff = tzD3.offset - offset;
var h = Math.floor(Math.abs(diff) / 60);
var m = Math.abs(diff) % 60;
var sign = Math.abs(diff) / diff;
tzD3.hour -= h * sign;
tzD3.minute -= m * sign;
return tzD3;
}
function toUTCISOString(date, timeZone) {
var whole = toUTC(date, timeZone);
return toOffsetISOString(whole);
}
XTZ = {
// bespoke date =>
// 2021-11-07T3:15:59-0500
toOffsetISOString: toOffsetISOString,
// -240 => -0400
formatOffset: formatOffset,
// [ "2021-11-07T08:15:59Z", "America/New_York" ]
// => "2021-11-07T03:15:59-0500" // 2021-11-07 03:15:59
toTimeZone: toTimeZone,
toTimeZoneISOString: toTimeZoneISOString,
// [ "2021-11-07 03:15:59", "America/New_York" ]
// => "2021-11-07T03:15:59-0500" // 2021-11-07T08:15:59Z
toUTC: toUTC,
toUTCISOString: toUTCISOString,
};
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);
// millisecond is explicitly 0 for iOS' lack of fractionalSecond support
var whole = { millisecond: 0 };
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 formatAsOffsetISOString(whole);
}
function _toOffsetISOString() {
/* jshint validthis: true */
return formatAsOffsetISOString(this);
}
function getOffset(utcDate, tzD2) {
var tzDate = new Date(formatAsOffsetISOString(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";
if ("undefined" != typeof module && module.exports) {
module.exports = XTZ;
}
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(date, timeZone) {
if ("object" === typeof date && "offset" in date && "year" in date) {
return formatAsOffsetISOString(date);
}
var whole = fromTimeZone(date, timeZone);
return formatAsOffsetISOString(whole);
}
function formatAsOffsetISOString(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
)}${offset}`
);
}
function fromTimeZone(dt, tz) {
if ("string" === typeof dt) {
// Either of these formats should work:
// 2021-03-14 01:15:59
// 2021-03-14T01:15:59Z
dt = dt
.replace("T", " ")
.replace("Z", "")
.replace(" ", "T")
.replace(/$/, "Z");
}
var utcDate = new Date(dt);
var tzD2 = toTimeZone(utcDate, tz);
var offset = tzD2.offset;
tzD2.offset = 0;
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 toLocalISOString(dateOrStr) {
var d;
if (dateOrStr) {
d = new Date(dateOrStr);
} else {
d = new Date();
}
var YYYY = d.getFullYear();
var MM = p2(d.getMonth() + 1);
var DD = p2(d.getDate());
var hh = p2(d.getHours());
var mm = p2(d.getMinutes());
var ss = p2(d.getSeconds());
var sss = d.getMilliseconds().toString().padStart(3, "0");
var offset = formatOffset(-d.getTimezoneOffset());
return `${YYYY}-${MM}-${DD}T${hh}:${mm}:${ss}.${sss}${offset}`;
}
function getTimeZone() {
return new Intl.DateTimeFormat().resolvedOptions().timeZone;
}
exports.XTZ = {
// bespoke date =>
// 2021-11-07T3:15:59-0500
// (todo?)
// xtzToISOString: formatAsOffsetISOString,
// (deprecated)
toOffsetISOString: toOffsetISOString,
// -240 => -0400
formatOffset: formatOffset,
// "America/New_York"
timeZone: getTimeZone,
// "2021-11-07T03:15:59-0500"
toLocalISOString: toLocalISOString,
// [ "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: fromTimeZone,
fromTimeZone: fromTimeZone,
// deprecated
toUTCISOString: toOffsetISOString,
};
if ("undefined" != typeof module && module.exports) {
module.exports = exports.XTZ;
}
})(("undefined" === typeof module && window) || exports);
}());

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xtz.min.js vendored
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@ -1 +1 @@
var XTZ;(function(){"use strict";function toTimeZone(date,timeZone){date=new Date(date);var options={timeZone:timeZone,year:"numeric",month:"numeric",day:"numeric",hour12:false,hour:"numeric",minute:"numeric",second:"numeric",fractionalSecondDigits:3};var tzOptions=Object.assign({timeZoneName:"long"},options);var formater=new Intl.DateTimeFormat("default",tzOptions);var parts=formater.formatToParts(date);var whole={millisecond:0};parts.forEach(function(part){var val=part.value;switch(part.type){case"literal":return;case"timeZoneName":break;case"month":val=parseInt(val,10)-1;break;case"hour":val=parseInt(val,10)%24;break;case"fractionalSecond":whole.millisecond=parseInt(val,10);return;default:val=parseInt(val,10)}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*1e3));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="-"}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){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=0;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={toOffsetISOString:toOffsetISOString,formatOffset:formatOffset,toTimeZone:toTimeZone,toTimeZoneISOString:toTimeZoneISOString,toUTC:toUTC,toUTCISOString:toUTCISOString};if("undefined"!=typeof module&&module.exports){module.exports=XTZ}})();
var XTZ;(function(){"use strict";function toTimeZone(date,timeZone){date=new Date(date);var options={timeZone:timeZone,year:"numeric",month:"numeric",day:"numeric",hour12:false,hour:"numeric",minute:"numeric",second:"numeric",fractionalSecondDigits:3};var tzOptions=Object.assign({timeZoneName:"long"},options);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":return;case"timeZoneName":break;case"month":val=parseInt(val,10)-1;break;case"hour":val=parseInt(val,10)%24;break;case"fractionalSecond":whole.millisecond=parseInt(val,10);return;default:val=parseInt(val,10)}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*1e3);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="-"}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)}${offset}`}function toUTC(dt,tz){if("string"===typeof dt){dt=dt.replace("T"," ").replace("Z","").replace(" ","T").replace(/$/,"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={toOffsetISOString:toOffsetISOString,formatOffset:formatOffset,toTimeZone:toTimeZone,toTimeZoneISOString:toTimeZoneISOString,toUTC:toUTC,toUTCISOString:toUTCISOString};if("undefined"!=typeof module&&module.exports){module.exports=XTZ}})();