Broken image size

[valtlai]

Some browsers ignore the image size (set with HTML attributes or CSS) when rendering broken images (Chrome always and Firefox when a non-empty alt text is provided).

Should browsers preserve the image size? Or should we require that when intrinsicsize attribute is specified?

[cathiechen]

Hi,
It seems reasonable to me that we apply intrinsicSize to broken image. I.e., the behavior of broken image is same to normal image. Otherwise, there's a user visible reflow.
For instance:

<img intrinsicSize='100 x 50' style='width: 200px;' src='errorImg.png'> text

The first render size of image would be 200 x 100. (intrinsicSize applied).
After detecting image error, the image ratio will be set to 1.
So the render size of image would become 200 x 200.
The text after image would be moved to a new position too.