UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36

Steps to reproduce the problem:
1. Open the attached testcase in Chrome.
2. Observe the background colors of the <textarea>s and <input>s.

What is the expected behavior?
The <textarea>s and <input>s should have white backgrounds.

What went wrong?
The <textarea>s and <input>s have red backgrounds, indicating that :read-write matched the disabled <input>s and disabled <textarea>s.

Did this work before? No 

Chrome version: 52.0.2709.0  Channel: canary
OS Version: OS X 10.11.4
Flash Version: Shockwave Flash 21.0 r0

Per https://html.spec.whatwg.org/multipage/scripting.html#selector-read-write , :read-write should match:

> * <input> elements [...] that are mutable (i.e. that [...] and that are not disabled)
> * <textarea> elements that [...], and that are not disabled

Thus, :read-write shouldn't be matching the disabled <input>s and disabled <textarea>s in the testcase.
 

Deleted: testcase-read-write.html 399 bytes

testcase-read-write.html 399 bytes View Download