mirror of https://github.com/home-assistant/frontend.git synced 2026-09-29 16:33:43 +01:00

T

Maarten Lakerveld 46de23727f Remove ES5 specific code (#53899 )

* Remove web components polyfills and ES5 custom elements adapter

All supported browsers (legacy floor: Chrome 59, Safari/iOS 12, Firefox 94)
have native shadow DOM and custom elements, so the webcomponents bundle,
ShadyCSS branch, and lit polyfill-support are unreachable. The legacy build
now emits ES2017 classes, so custom-elements-es5-adapter and the
window.loadES5Adapter hook (no known third-party consumers) are removed.
Also stops shipping the never-loaded dialog-polyfill css and drops both
now-unused dependencies.

* Remove keyed-es5 Terser workaround

The custom keyed directive existed because Terser with ecma: 5 miscompiled
the destructured update() parameters (#28732). The legacy build now minifies
with ecma: 2017, so the stock lit-html keyed directive works in both builds.

* Remove old-browser JS shims and stale ES5 build references

Drops the IE-only navigator.msMaxTouchPoints check, replaces the
toggleAttribute helper with the native method (polyfilled automatically for
Chrome < 69 in the legacy build), and removes babel excludes for the
uninstalled proxy-polyfill and unfetch packages. Updates comments that
still described the legacy build as ES5.

* Remove vendor prefixes for no-longer-supported browsers

Deletes -ms- prefixes (IE/EdgeHTML only) and -webkit-/-moz- prefixed
declarations that every supported browser understands unprefixed, or that
Lightning CSS re-adds automatically from the unprefixed property in
production builds. Blocks that only had prefixed user-select now use the
standard property (previously Firefox got no user-select there at all).
Converts the four -webkit-linear-gradient() declarations - the sole
gradient syntax on those sliders - to standard linear-gradient().

* Remove dead html_url custom panel support

html_url pointed to an HTML Import, a Polymer-era feature removed from
Chrome in 2019 and never shipped elsewhere. The loader has not handled the
html type for years (it fell through to a rejection), and core's
panel_custom integration no longer accepts the option, so the branch was
unreachable. Also drops the ha-panel-${name} legacy tag naming that was
keyed on html_url.

* Repair list-plugins-and-polyfills script for Babel 8

The audit script died at startup since the Babel 8 update: preset-env no
longer exposes lib/debug.js (logPlugin is now inlined locally, built on the
public getInclusionReasons helper) and babel-plugin-polyfill-corejs3 v1 no
longer ships lib/shipped-proposals.js (list inlined).

Instead of invoking the preset with a hand-mocked plugin API - the part
that kept drifting - the plugin listing now runs a real transform of an
empty file with preset-env in debug mode, declaring the same caller
capabilities as babel-loader. The polyfill listing now passes the
configured core-js version to core-js-compat, mirroring the provider's own
filtering so the report cannot list modules the installed core-js lacks.
Output is byte-identical to the direct-invocation approach. Also documents
the script in the build-scripts README.

* Correct macOS floor for Safari 26 in companion app UA regex

Safari 26 ships for macOS 14 Sonoma and 15 Sequoia, not only macOS 26, so
the SAFARI_TO_MACOS entry breaking the minimum-supported-macOS pattern
would have sent updated macOS 14/15 companion apps to the legacy build
once the modern floor reaches Safari 26.

* Remove orphaned values left behind by vendor prefix removal

* Require macOS 14.6 for Safari 26 in companion app UA regex

2026-09-02 08:15:36 +03:00