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fix: keep ESM consumers on ES5, enable tree-shaking, trim bundled.js (#634)

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Naor Peled
2026-09-27 12:10:11 +03:00
committed by GitHub
parent c1208b4a56
commit fd556800ee
6 changed files with 119 additions and 23 deletions
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19
build/entries/bundled.js
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@@ -2,14 +2,23 @@
* UMD entry point for `bundled.js` — same as `es5.js`, but with the polyfills
* needed by the browser targets baked in.
*
* `core-js/stable` + `regenerator-runtime/runtime` is the core-js@3 equivalent
* of the deprecated `@babel/polyfill` that this bundle used to be built from.
* `@babel/preset-env`'s `useBuiltIns: 'entry'` rewrites the `core-js/stable`
* import below into just the polyfills the configured targets actually need.
* This is the core-js@3 equivalent of the deprecated `@babel/polyfill` that
* this bundle used to be built from, which was: all of ECMAScript, the
* `timers`, `immediate` and DOM-collection iterator web polyfills, and
* `regenerator-runtime`. `@babel/preset-env`'s `useBuiltIns: 'entry'` rewrites
* the `core-js/*` imports below into the modules the configured targets need.
*
* `core-js/es` rather than `core-js/stable`: `stable` is `es` plus every web
* polyfill, and the extra ones — `URL`, `URLSearchParams`, `queueMicrotask` —
* were never in any released `bundled.js`, yet cost ~20 kB (~7 kB gzipped).
* `test/acceptance/test-es5-runtime.js` pins the `@babel/polyfill` surface.
*
* See `./es5.js` for why this only re-exports the default.
*/
import 'core-js/stable';
import 'core-js/es';
import 'core-js/web/dom-collections';
import 'core-js/web/immediate';
import 'core-js/web/timers';
import 'regenerator-runtime/runtime';
import Bowser from '../../src/bowser.js';