const JS_URL = "https://cdn.solvefit.co.uk/js/plugin.js";

document.addEventListener("DOMContentLoaded", function() {
    if(JS_URL && JS_URL.length > 0) {
        $.getScript(JS_URL)
        .done(function( script, textStatus ) {
            // DO NOTHING - the script has been loaded successfully
        })
        .fail(function( jqxhr, settings, exception ) {
            $.getScript("/js/plugin.js");
        });
    }
});