Fastest way to iterate through each child node of an element and call a function

for-each-child.js

// Traversing with firstChild/nextSibling is much faster than childNodes: https://jsperf.app/nextsibling-vs-childnodes

function forEachChild(element, callback) {
    let node = element.firstChild;
    while (node) {
        callback(node);
        node = node.nextSibling;
    }
}