import 'bootstrap'; document.addEventListener("readystatechange", event => { if(event.target.readyState === 'complete') { initTags(); } }); function initTags() { document.querySelectorAll('.tag').forEach(elem => { let backcolor = elem.dataset.backgroundColor; let frontcolor = elem.dataset.color; elem.style.backgroundColor = backcolor; elem.style.color = frontcolor; }) }