How to add anything in <head> through jquery/javascript?
Solution 1:
You can select it and add to it as normal:
$('head').append('<link />');
Solution 2:
JavaScript:
document.getElementsByTagName('head')[0].appendChild( ... );
Make DOM element like so:
const link = document.createElement('link');
link.href = 'href';
link.rel = 'rel';
document.getElementsByTagName('head')[0].appendChild(link);
Solution 3:
jQuery
$('head').append( ... );
JavaScript:
document.getElementsByTagName('head')[0].appendChild( ... );