340111 - Error console should say something different for unsupported but standard CSS

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[Jason Barnabe (np)]

Right now, if you visit a site that uses CSS that is standard but unsupported in Gecko (ex: display: inline-table), you get the message

  Error in parsing value for property 'display'.  Declaration dropped.

This is confusing to web developers because it leads them to believe that "inline-table" is not a valid value for "display". The same goes for unsupported properties

  Unknown property 'border-radius'.  Declaration dropped.

For unsupported yet standard properties and values, we should instead say something along the lines of

  Property 'border-radius' not yet supported in Firefox.  Declaration dropped.

Comment 1

[Cameron]

Hmm okay, file a bug if you must, but this is going to miss Firefox 2 (1.8 branch) and I sure hope we'd be able to have complete CSS 2.1 support by Firefox 3.

Also, does it perhaps belong under "error console" ? I'm not familiar with how the code works, but that'd be my guess for component.

Comment 2

[Cameron]

Oops, sorry David, I didn't mean to change the component :s

Callek expressed interest in this earlier.

Comment 3

[Justin Wood (:Callek)]

>I sure hope we'd be able to have complete CSS 2.1 support by Firefox 3.

Well, considering CSS2.1 is not yet a Technical Recomendation, (nor even a last call, it was reverted to a Working Draft) currently.  We can _not_ have complete support of it just yet.

As I expressed initially, I am interested in this bug (Thanks for the CC); however I feel this may best be completed as an extension to Firefox (which watches the error console's actual errors) rather than as something created internally to send different messages.

Comment 4

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Comment 3 doesn't make much sense, either on its comments about CSS 2.1 or about how to implement this.