How to implement looping Nodelist Dom list using JS

function $(id) { return document.getElementById(id); } var _PAGE = { timeListDom: $('timeList') }; var spanDoms = _PAGE.timeListDom.querySelectorAll('span'), domLen = spanDoms.length; // 第一种方式：原生for循环 for (var i = 0; i < domLen; i++) { var v = spanDoms[i]; // do something you want deal with DOM } // 第二种方式：Array 的 forEach函数 Array.prototype.forEach.call(spanDoms, function(v) { // do something you want deal with DOM }); // 第三种方式：Array 的 forEach函数 [].forEach.call(spanDoms, function(el) { // do something you want deal with DOM el.classList.remove('active'); }); // 第四种方式：继承Array 的 forEach函数 NodeList.prototype.forEach = Array.prototype.forEach; spanDoms.forEach(function(v) { // do something you want deal with DOM });