text/javascript vs application/javascript [duplicate]
Per this, text/javascript is obsolete. Use application/javascript instead.
text/javascript (Obsolete): JavaScript; Defined in and made obsolete in RFC 4329 in order to discourage its usage in favor of application/javascript. However, text/javascript is allowed in HTML 4 and 5 and, unlike application/javascript, has cross-browser support. The "type" attribute of the tag in HTML5 is optional and there is no need to use it at all since all browsers have always assumed the correct default (even in HTML 4 where it was required by the specification).
This standard is incompatible with IE<=8.