//Add deferred js libs function loadAndGo(jsUrl, condition, action, delay = 250) { if (condition()) { console.log('action!'); action(); } else { if (jsUrl) { console.log('loading js', jsUrl); let s = document.createElement('script'); s.src = jsUrl; document.body.appendChild(s); } setTimeout(loadAndGo, delay, false, condition, action, delay); } }