How to display the "Update Your Browser" warning when the user's browser does not support HTML5 tags or CSS3 properties?
An initiative that encourages this is the link site, but they do provide a script for it.
Would it be possible to do this without a javascript or jquery script, using only HTML5 and CSS3 techniques?
For example, if you use the <video>
or <audio>
tag by placing text inside it, before or after the <source>
tags, as in the example below, this text will only be shown when the browser does not support these tags, consequently to html5. But I did not find a good way to style this warning. I also do not know if this warning would be the best way to do that.
<video id="aviso">
Desculpe mas seu navegador não dá suporte a HTML5
</video>
Even though it is not possible, what is the best way to do this with javascript / jquery ?