Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <head> <style> .democlass { color: red; } </style> </head> <body> <h1 class="democlass">Hello World</h1> <p>点击按钮显示h1元素的class属性节点的值。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var elmnt = document.getElementsByTagName("H1")[0]; var attr = elmnt.getAttributeNode("class").value; document.getElementById("demo").innerHTML = attr; } </script> </body> </html>