How to remove the type attribute from script tags of an Html5 document?

Question

From the beginning of december 17, W3C XHTML started to point out this error:

The type attribute is unnecessary for JavaScript resources.

The above warning is generated inside Joomla script itself to call modules or jQuery, CSS, etc. and is not written in any Joomla file. Probably is related the way Joomla call scripts in core files. This problem also appears in WordPress, but there is a workaround. In Joomla I removed all the modules, the warnings decrease, but still there. I tested with another template, updated Joomla version to 3.8.3 and no solution.

Answer 1

Joomla adds this attribute by default when a javascript is added but the type parameter is not specified. You can see this in the addScript function at libraries\src\Document\Document.php.

Whilst you could write a plugin to override this output, it seems a pointless endeavour. A warning is not the same as an error. In this case, the code is still valid, merely with some unnecessary bulk (this is because the HTML5 specification states that the default type value of <script> is already "text/javascript").

I'd assume future versions of Joomla are likely to remove that tag as it serves no real purpose any more - users on non-HTML5 browsers are going to be practically none-existant.

Whilst you should always use a validator, fixing every error and warning can be a mistake. Review them, and make sure you understand them. Fix any potentially harmful ones (most errors will be, most warnings will not be), and make sure the others are justifiable. In this case, it would add code bulk to your site with no benefit to a user, and as such, fixing the warning would seem to be a mistake.

Answer 2

The solution was found by user FabrizioG adding the following line in the index.php of the template:

// Set HTML5 Document Output
$doc = JFactory::getDocument();
$doc->setHtml5(true); 

Some warnings remain because I use JCHOPtimize, it was easily solved by removing the "type" attribute in file linkbuilder.php

Answer 3

With the newest Joomla 3.9.x - its hard coded in the script and: $doc->setHtml5(true) - doesn't seem to work.

My solution was to edit the file in /libraries/cms/html/email.php

Change:

$inlineScript = "<script type='text/javascript'>" . $script . "</script>";

to

$inlineScript = "<script>" . $script . "</script>";