CKEditor adds html entities to inline CSS. Is the CSS still valid?

Question

I have this piece of code:

<table style="background-image: url(path/to_image.png)"> 

And when I load it in CKEditor it's transformed in:

<table style="background-image: url(&quot;path/to_image.png&quot;)">

Is this still still valid CSS? Actually I'm not so interested if it's valid but if there would be any problems with any web browser or email client ( the editor is used for composing a html email ). Firefox and Thunderbird seem to be fine with it.

Answer 1

Yes, of course it is. Attribute values don't stop being attribute values just because they contain CSS or a URL. Entities still work (and are required if the character would otherwise have special meaning).

Answer 2

It's very valid (Actually, this is probably the only valid way to do it! Got to keep this in mind.), but I would still test it in major E-Mail clients just to make sure. As we all know, HTML support in E-Mails is abysmal.

Answer 3

It's valid, and required by the HTML standard, but it's unlikely to work in Outlook Express.

Answer 4

Anyway, using background-image: url() won't work in an email with Thunderbird. Unless they have fixed it, Thunderbird didn't show background images.

And in the rest of mail clients, the user will get a warning because the mail is trying to load external files.