1757269 - list counter is affected by css counter in Firefox 68 or later

Status: RESOLVED INVALID

(Core :: Layout: Generated Content, Lists, and Counters, defect)

Description

[coeurl]

Attachment: counter-reset.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:97.0) Gecko/20100101 Firefox/97.0

Steps to reproduce:

I applied counter-reset: none to a simple valid nested ol element and it changed the list counter. Is this a bug in Firefox?

I created a test page.

• https://codepen.io/arcxor/pen/podOavd

Actual results:

In Firefox (68 or later), it will look like this.

    1. (1)
        2. (1-1)
        3. (1-2)
    4. (2)
        5. (2-1)
        6. (2-2)

Expected results:

In Firefox (67 or earlier) or Google Chrome, it will look like this.

    1. (1)
        1. (1-1)
        2. (1-2)
    2. (2)
        1. (2-1)
        2. (2-2)

Comment 1

[Release mgmt bot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Layout: Generated Content, Lists, and Counters' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Emilio Cobos Álvarez (:emilio)]

No, Firefox is following the spec, see https://drafts.csswg.org/css-lists/#list-item-counter and https://html.spec.whatwg.org/#lists. You can use counter-reset: list-item to get the behavior you want presumably.

Comment 3

[coeurl]

Thank you for your quick answer.

I'm sorry that my lack of understanding caused you so much trouble. I'm going to assume that Firefox's behavior is correct and proceed with further investigation.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

Hey no problem, closing a bug is not much work, thanks for reporting it! :)

Comment 5

[coeurl]

Notes: https://bugzilla.mozilla.org/show_bug.cgi?id=1548753#c30