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Upgrading jsdom 27 to 28

Breaking27.4.0 → 28.1.0Breaking1New3Changed3Fixed13

BreakingUpgrade verdict

1 breaking change.

  • Regression: WebSockets are no longer correctly throttled to one connection per origin.
1 item needs code or config changes

Adds @bramus/specificity ^2.4.2, undici ^7.21.0.

Drops ws.

Installs 45 packages in all (was 44).

Also installs @asamuzakjp/generational-cache.

Moves @asamuzakjp/css-color 4.1.2 → 5.1.11, cssstyle 5.3.7 → 6.2.0, data-urls 6.0.1 → 7.0.0, whatwg-mimetype 4.0.0, 5.0.0 → 5.0.0, whatwg-url 15.1.0 → 16.0.1. Your build may pick other versions.

Breaking1
Regression: WebSockets are no longer correctly throttled to one connection per origin.
WebSocket