W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { myFunction(this); } }; xhttp.open("GET", "/demo/xml/books.xml", true); xhttp.send(); function myFunction(xml) { var x, i, xmlDoc, txt; xmlDoc = xml.responseXML; txt = ""; x = xmlDoc.getElementsByTagName('book'); for (i = 0; i < x.length; i++) { txt += x.item(i).attributes[0].specified + "<br>"; } document.getElementById("demo").innerHTML = txt; } </script> <p>如果在文档中设置了属性值，则 specified 属性返回 true；如果它是 DTD/Schema 中的默认值，则返回 false。</p> </body> </html>