jQuery script to add target=“_blank” for outgoing links

external_links.js

( function( $ ) {

    $('a[href^="http://"]').filter(function(){
        // filter out links that have the same domain name as the current page
        return this.hostname && this.hostname !== location.hostname;
    })

    // add a CSS class of "external" to each external link (for styling)
    .addClass("external")

    // inform visitor that link will open in new window
    .attr({
        target: "_blank",
        title: function(){ return this.title + ' - Link will open in new window' },
    });

} )( jQuery )