Drop support for older versions of Chromium with frozen adoptedStyleSheets #2828
Description
The original adoptedStylesheet proposal used a frozen array. A follow-up proposal made the array mutable. Chromium 99+ and Firefox 101+ support mutable arrays.
We check if the array is mutable, to ensure backward compat:
lwc/packages/@lwc/engine-dom/src/renderer.ts
Lines 41 to 43 in 5af18fd
We should re-evaluate this in the future once we drop support for older versions of Chromium.