Re: src overriding href overriding xlink:href

Elaboration:  http://codepen.io/AmeliaBR/details/wBZrog

The basic structure is, within inline SVG, create an `<image>` element that
has a `src` attribute pointing to your fallback content, but an invalid
`xlink:href` attribute.  Old browsers see a  non-standard HTML `<img>`,
modern browsers see an empty SVG `<image>`, everyone is happy.

It's probably not quite as common a fallback technique as using JS (either
directly or by using Modernizr to set CSS classes), but it is more robust.
And it is used.  It might be used even more frequently soon: the above demo
was created for a blog post on SVG Fallbacks, which will be published in
the near future on CSS-Tricks.

If suddenly `src` gained meaning in SVG, and especially if it took
precedence over `xlink:href`, these SVGs would be downloading fallback
images and painting them overtop of the SVG content.

On 16 April 2015 at 20:27, Brian Birtles <bbirtles@mozilla.com> wrote:
>
> Amelia brought up concerns about people using 'src' on an SVG image to
> provide some fallback to an HTML image. I don't know the particular pattern
> so perhaps she can elaborate.
>
>