Bug 119039 – Layout <img> with empty src attribute.

• Component: Layout and Rendering
• Status: RESOLVED INVALID

[Jaehun Lim]

There is a difference between WebKit and FF.
Which one is right ?

In my testcase, <div> has +500px height in WebKit and 0 height in FF.

[Jaehun Lim]

Created attachment 207383 [details]
testcase

[zalan]

What I think is happening here is that FF considers this <img> element empty and empty inline elements generate empty inline boxes (like <span></span>) We, on the other hand, similarly to Opera create an inline box for it and this linebox is getting its calculated height value from the parent's font-size attribute.
Once you add either padding, margin or border to the <img>, FF starts behaving like us.
I couldn't find any traces in the spec when the <img> should be treated empty if at all.

[Jaehun Lim]

(In reply to comment #2)
> What I think is happening here is that FF considers this <img> element empty and empty inline elements generate empty inline boxes (like <span></span>) We, on the other hand, similarly to Opera create an inline box for it and this linebox is getting its calculated height value from the parent's font-size attribute.
> Once you add either padding, margin or border to the <img>, FF starts behaving like us.
> I couldn't find any traces in the spec when the <img> should be treated empty if at all.

'src' in <img> is a mandatory attribute. I can't find how to treat <img> with empty src attribute in spec, too.

Is it a bug ?

[Ahmad Saleem]

All browsers render this testcase same with space and not collapsed, so I think Firefox changed the behavior.

I tested via STP169, Chrome Canary 115 and Firefox Nightly 114.

Considering Firefox changed, it would be RESOLVED INVALID>