[gjs/mozjs91] release: Add release notes for SpiderMonkey 91
- From: Philip Chimento <pchimento src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gjs/mozjs91] release: Add release notes for SpiderMonkey 91
- Date: Mon, 11 Oct 2021 22:07:09 +0000 (UTC)
commit 273a77026cf3c8cf59337077c3384205c1e45c92
Author: Philip Chimento <philip chimento gmail com>
Date: Mon Oct 11 15:05:07 2021 -0700
release: Add release notes for SpiderMonkey 91
NEWS | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
---
diff --git a/NEWS b/NEWS
index ce7c1707..e7949cdc 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,67 @@
+NEXT
+----
+
+- New JavaScript features! This version of GJS is based on SpiderMonkey 91, an
+ upgrade from the previous ESR (Extended Support Release) of SpiderMonkey 78.
+ Here are the highlights of the new JavaScript features.
+ For more information, look them up on MDN or devdocs.io.
+
+ * New syntax
+ + Private class fields and methods are now supported. They start with `#`
+ and are not accessible outside the class in which they are defined.
+ + The `??=` logical nullish assignment operator, which assigns the
+ right-hand side value to the left-hand side variable if the variable is
+ null or undefined.
+ + The `&&=` logical-and assignment operator, which assigns the right-hand
+ side value to the left-hand side variable if the variable is truthy.
+ + The `||=` logical-or assignment operator, which assigns the right-hand
+ side value to the left-hand side variable if the variable is falsey.
+ + `export * as ... from ...` can be used to aggregate modules.
+ + Regular expressions add the `d` flag, which if defined causes the
+ resulting match object to have an `indices` property giving the positions
+ in the string where capturing and named groups matched.
+
+ * New APIs
+ + Arrays, strings, and typed arrays have gained the `at()` method, which
+ does the same thing as indexing with square brackets but also allows
+ negative numbers, which count from the end, as in Python.
+ + `Promise.any()`, which is similar to `Promise.race()` but resolves on the
+ first successful sub-promise, instead of the first to resolve.
+ + `Error()` now takes an options object as its second parameter, which may
+ contain a `cause` property. This option is used to indicate when an error
+ is caused by another error, but the first error is caught during error
+ handling.
+ + `WeakRef`, which allows you to hold a reference to an object while still
+ allowing it to be garbage collected.
+ + `dateStyle`, `timeStyle`, `fractionalSecondDigits`, and `dayPeriod` are
+ now accepted as options in `Intl.DateTimeFormat()` and
+ `Date.prototype.toLocaleString()`.
+ + `collation` is now accepted as an option in `Intl.Collator()`.
+ + `Intl.DisplayNames` has been added, which allows you to get translations
+ of language, region, currency, and script names.
+ + `Intl.DateTimeFormat` has gained the `formatRange()` and
+ `formatRangeToParts()` methods.
+
+ * New behaviour
+ + More numbering systems are supported in `Intl.NumberFormat`.
+ + There are a lot of minor behaviour changes as SpiderMonkey's JS
+ implementation conforms ever closer to existing ECMAScript standards and
+ adopts new ones. For complete information, read the Firefox developer
+ release notes:
+ https://developer.mozilla.org/en-US/Firefox/Releases/79#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/80#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/81#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/82#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/83#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/84#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/85#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/86#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/87#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/88#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/89#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/90#JavaScript
+ https://developer.mozilla.org/en-US/Firefox/Releases/91#JavaScript
+
Version 1.70.0
--------------
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