I was reading a book about learning JavaScript, and there was these paragraphs:
...in middle of 1997, Microsoft and Netscape, with associate of Europe
The current version of the HTML standard (last updated 16 July 2019) says that the language type specified with the type
attribute of the tag falls back to
text/javascript
if ommitted.
Also that specification specifies that:
Servers should use text/javascript for JavaScript resources. Servers should not use other JavaScript MIME types for JavaScript resources, and must not use non-JavaScript MIME types.