Detect all duplicated element id in page

check-duplicated-id-element.js

var nodes = document.querySelectorAll('[id]');
var ids = {};
var totalNodes = nodes.length;

for(var i=0; i<totalNodes; i++) {
    var currentId = nodes[i].id ? nodes[i].id : "undefined";
    if(!ids[currentId]) {
        ids[currentId] = [];
    }                 
    ids[currentId].push(nodes[i]);
}
console.log('>>>Duplicated Ids:')
for (id in ids){if(ids[id].length > 1){console.log(ids[id])}}
console.log('>>>all ids:')
console.log(ids);