Learned Something New Today

I learned something very interesting today regarding JavaScript. Back in the day, I used to put something like this in my HTML when I wanted to include some JS:

<script language="javascript">
...
</script>

Then I learned that I should be using something like this instead:

<script type="text/javascript">
...
</script>

I've been doing that for years and years now. Turns out I've been wrong all this time. Well, at least for 4 years of that time. I stumbled upon RFC4329 today for whatever reason and noticed that it said the text/javascript mimetype is obsolete. I dug into the RFC a bit and found this:

Various unregistered media types have been used in an ad-hoc fashion
to label and exchange programs written in ECMAScript and JavaScript.
These include:

   +-----------------------------------------------------+
   | text/javascript          | text/ecmascript          |
   | text/javascript1.0       | text/javascript1.1       |
   | text/javascript1.2       | text/javascript1.3       |
   | text/javascript1.4       | text/javascript1.5       |
   | text/jscript             | text/livescript          |
   | text/x-javascript        | text/x-ecmascript        |
   | application/x-javascript | application/x-ecmascript |
   | application/javascript   | application/ecmascript   |
   +-----------------------------------------------------+

Use of the "text" top-level type for this kind of content is known to
be problematic.  This document thus defines text/javascript and text/
ecmascript but marks them as "obsolete".  Use of experimental and
unregistered media types, as listed in part above, is discouraged.
The media types,

   * application/javascript
   * application/ecmascript

which are also defined in this document, are intended for common use
and should be used instead.

So yeah. It's time to go update all of my JavaScript stuff I guess. I thought the rest of you who are/were in the same boat as me might like to know about this...