>
I wish we could version our JavaScript within a tag somehowBehold one of the implementational details that emerged out of this language that was indeed "designed in 2 weeks":
<script type="text/javascript1.0">...</script>
<script type="text/javascript1.1">...</script>
<script type="text/javascript1.2">...</script>
<script type="text/javascript1.3">...</script>
<script type="text/javascript1.4">...</script>
<script type="text/javascript1.5">...</script>
https://tools.ietf.org/html/rfc4329:
3. Deployed Scripting Media Types and Compatibility
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 |
+-----------------------------------------------------+
https://www.quirksmode.org/js/intro.html (from circa 2007, when it was trendy to NOT date webpages
shakes fist):
> JavaScript versions
> There have been several formal versions of JavaScript.
> 1.0: Netscape 2
> 1.1: Netscape 3 and Explorer 3 (the latter has bad JavaScript support, regardless of its version)
> 1.2: Early Version 4 browsers
> 1.3: Later Version 4 browsers and Version 5 browsers
> 1.4: Not used in browsers, only on Netscape servers
> 1.5: Current version.
> 2.0: Currently under development by Brendan Eich and others.
The link above points to a bit of interesting general discussion about versioning, and isn't as dense as the RFC.