Open external links in new window, except mailto and tel.

OpenExternalLinksInNewWindow.js

function OpenExternalLinksInNewWindow() {
    $('a').each(function() {
        if (
            this.href.startsWith('tel:')
            || this.href.startsWith('mailto:')
        ) {
            return;
        }
        var a = new RegExp('/' + window.location.host + '/');
        if(!a.test(this.href)) {
            $(this).click(function(event) {
                event.preventDefault();
                event.stopPropagation();
                window.open(this.href, '_blank');
            });
        }
    });
}