点击运行
<!DOCTYPE html> <html> <body> <p id="demo">请点击按钮来获得文档首个子节点的节点名。</p> <button onclick="myFunction()">试一下</button> <script> function myFunction() { var x=document.getElementById("demo"); x.innerHTML=document.firstChild.nodeName; } </script> </body> </html>
运行结果
