Dom Collection和NodeList对象
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <p class="p1">p1</p> <p>p2</p> <script type="text/javascript" src="Dom_Collection.js"> </script> </body> </html>
//获取Collection对象 HTML 元素的集合 var myColl=document.getElementsByTagName("p"); console.log(myColl); console.log(myColl.length); var myNode=document.getElementsByClassName("p1"); console.log(myNode); //获取NodeList对象 文档节点的集合。 var myNode1=document.querySelectorAll("p"); console.log(myNode1);