XML DOM isId Property
❮ Attr Object
Example
The following code fragment loads "books.xml" into xmlDoc and returns whether the category attribute is an ID attribute of the <book> element:
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
myFunction(this);
}
};
xhttp.open("GET", "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].isId + "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
Try it Yourself »
Definition and Usage
The isId property returns true if an attribute is known to be of type ID (e.g. contains an identifier for its owner element), otherwise it returns false.
Syntax
attrObject.isId
❮ Attr Object
