Re: [csswg-drafts] [cssom-1] Define `CSSRule.cssText` with `readonly` (#8778)

https://webidl.spec.whatwg.org/#dfn-read-only

> It is language binding specific whether assignment is simply disallowed by the language, ignored or an exception is thrown.

For ECMAScript, in https://webidl.spec.whatwg.org/#define-the-attributes the setter will be undefined. So per https://tc39.es/ecma262/#sec-putvalue the behavior will be that it throws in strict mode and it silently fails otherwise.

TL;DR: Marking it as `readonly` would make assignments throw in strict mode.

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Received on Monday, 1 May 2023 18:23:11 UTC