Message should gracefully degrade

[martincostello]

Using v0.1.0 with either of Edge, Firefox or Internet Explorer, the message does not render correctly and either outputs formatting characters or does not output the images (excluding the artifact caused by #5).

Ideally the JavaScript should detect if the formatting features are available, and if not either output a simpler message or just not output at all.

Edge

Firefox

Internet Explorer

[DamianMullins]

This article has details on supported string substitutions, I've tested in the browsers listed above and they work fine.

The one which is missing, and we use, is the %c CSS substitution.

I've not been able to find a nice way to handle this other than browser sniffing.

[DamianMullins]

Ok, I take it back, the %c substitution is supported, however, it appears that background images are not supported outside of Chrome.