点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript HTML DOM</h1> <p>Hellow World!</p> <p>Hello China!</p> <p id="demo"></p> <script> var myNodelist = document.querySelectorAll("p"); document.getElementById("demo").innerHTML = "此文档包含 " + myNodelist.length + " 段文字。"; </script> </body> </html>
运行结果
