I already listed them: doctypes, the lang/type attribute for script/style/link tags, and custom elements/attributes.
Back in the day, you could use alternate scripting languages in IE: VBScript shipped by default, but there was also the ability to install an ActiveX extension to enable Python and some others in the script tag.
I already listed them: doctypes, the lang/type attribute for script/style/link tags, and custom elements/attributes.
Back in the day, you could use alternate scripting languages in IE: VBScript shipped by default, but there was also the ability to install an ActiveX extension to enable Python and some others in the script tag.