Vanilla JS element repeater, useful for flat prototyping

jsrepeat.js

// Add data-repeat attribute to the element you want repeated, the value being the quantity
// That element will be cloned and appended X number of times *after* the original.

var torepeat=document.querySelectorAll("[data-repeat]");

for (a=0;a<torepeat.length;a+=1) {
    var el=torepeat[a];
    var rpt=el.getAttribute("data-repeat");

    for (r=0;r<rpt;r+=1) {
        el.insertAdjacentHTML('afterend',el.cloneNode(true).outerHTML);
    }
}