Open all external links in a new window

jquery.external-links-new-window.js

/**
 * Open all external links in a new window
 */
(function ($) {
    function openExternalLinksInNewWindows() {
        $('a')
            .filter('[href^="http"], [href^="//"]')
            .not('[href*="' + window.location.host + '"]')
            .attr('rel', function (i, val) {
                return 'noopener noreferrer ' + (val || '');
            })
            .attr('target', '_blank');
    }
    
    if (typeof InstantClick !== 'undefined') {
        InstantClick.on('change', openExternalLinksInNewWindows);
    } else {
        $(openExternalLinksInNewWindows);
    }
})(this.jQuery);

Updated to preserve existing rel attribute value (as opposed to overwriting it).

Added InstantClick (a PJAX library) support.

Hi @rungta ,
THX 4 this script!
But if i use it, i get an error "Uncaught ReferenceError: InstantClick is not defined".
I change the line 15 into "(typeof InstantClick != "undefined")" and it works for me.
best regards

Fixed it. Thanks @cn-tools!