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Redefine browser requirements for modern (latest) builds (#16506)

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* Redefine browser requirements for modern (latest) builds

* Rename babel class properties plugin

* Fix only allowing latest Android

* Add browsers released in last year

* Use at or above for utilization (no change to browsers currently)

* Only use time query (no effective change)

* Add transform for private methods

* Fix some typos in browserslist config

Co-authored-by: Quentame <polletquentin74@me.com>

* bump browserslist-useragent-regex

* Add fallback feature detection for Array.prototype.findLast

---------

Co-authored-by: Quentame <polletquentin74@me.com>
This commit is contained in:
Steve Repsher
2024-07-19 10:49:19 -04:00
committed by GitHub
parent d94d5f96c3
commit 345000a0e9
15 changed files with 126 additions and 80 deletions
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35
.browserslistrc
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@@ -1,28 +1,25 @@
[modern]
# Support for dynamic import is the main litmus test for serving modern builds.
# Although officially a ES2020 feature, browsers implemented it early, so this
# enables all of ES2017 and some features in ES2018.
supports es6-module-dynamic-import
# Exclude Safari 11-12 because of a bug in tagged template literals
# https://bugs.webkit.org/show_bug.cgi?id=190756
# Note: Dropping version 11 also enables several more ES2018 features
not Safari < 13
not iOS < 13
# Exclude KaiOS, QQ, and UC browsers due to lack of sufficient feature support data
# Babel ignores these automatically, but we need here for Webpack to output ESM with dynamic imports
# Modern builds target recent browsers supporting the latest features to minimize transpilation, polyfills, etc.
# It is served to browsers meeting the following requirements:
# - released in the last year + current alpha/beta versions
# - Firefox extended support release (ESR)
# - with global utilization at or above 0.5%
# - must support dynamic import of ES modules
# - exclude browsers no longer being maintained
# - exclude KaiOS, QQ, and UC browsers due to lack of sufficient feature support data
unreleased versions
last 1 year
Firefox ESR
>= 0.5% and supports es6-module-dynamic-import
not dead
not KaiOS > 0
not QQAndroid > 0
not UCAndroid > 0
# Exclude unsupported browsers
not dead
[legacy]
# Legacy builds are served when modern requirements are not met and support browsers:
# - released in the last 7 years + current alpha/beta versionss
# - with global utilization above 0.05%
# - with global utilization at or above 0.05%
# The lattermost query ensures that support for popular old browsers is not dropped too early
# (e.g. IE 11, Android 4.4, or Samsung 4).
#
@@ -36,10 +33,10 @@ not dead
# As of May 2023, only web sockets must be added to the query.
unreleased versions
last 7 years
> 0.05% and supports websockets
>= 0.05% and supports websockets
[legacy-sw]
# Same as legacy plus supports service workers
unreleased versions
last 7 years
> 0.05% and supports websockets and supports serviceworkers
>= 0.05% and supports websockets and supports serviceworkers