1434268 - [FAIL] clicking and preventDefaulting a checkbox causes the checkbox to be checked during the click handler but reverted

Status: NEW

(Core :: DOM: Events, defect, P3)

Description

[m.kurz]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36

Steps to reproduce:

Go to http://w3c-test.org/html/semantics/forms/the-input-element/checkbox-click-events.html

The test was posted here: https://bugs.webkit.org/show_bug.cgi?id=149398#c5


Actual results:

First test fails ("clicking and preventDefaulting a checkbox causes the checkbox to be checked during the click handler but reverted")


Expected results:

First test should pass

Comment 1

[Chris Rebert]

The failing array equality assertion in Firefox has the actual value:
[false, false, false]
instead of the expected value:
[ true,  true, false]
where:
#0: In click event listener, immediately before calling preventDefault().
#1: In click event listener, immediately after calling preventDefault().
#2: Right after HTMLElement.click() returns.

Presumably the checkbox's checkedness isn't getting toggled to `true` right before the event listener dispatch occurs.
Spec: https://html.spec.whatwg.org/multipage/input.html#the-input-element:legacy-pre-activation-behavior

Comment 2

[m.kurz]

This seems to be fixed. Using Firefox 75 on Ubuntu 18.04 all tests in http://w3c-test.org/html/semantics/forms/the-input-element/checkbox-click-events.html are now passing.

I think this issue can be closed.