Benni Mack authored Jul 15, 2019 and Oliver Hader committed Jul 16, 2019

HTML5 defines that <script tags do not need "type=text/javascript"
as additional attribute.

TYPO3 Backend is fully HTML5, so all parts can be removed there.

For Frontend, when having config.doctype = html5 (or empty),
then the attributes do not get added anymore as well.

If necessary, for Frontend rendering the attribute can be
added in HTML5 by specifying
includeJS.myfile.type = text/javascript
in TypoScript.

As this modifies Frontend output, it is considered breaking.

Also see W3C specification:
https://www.w3.org/TR/html52/semantics-scripting.html#element-attrdef-script-type

Resolves: #88772
Releases: master
Change-Id: I26ca4361e84cae680eedbf6855e209a6311c33da
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61300


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>