XML DOM substringData() Method
Comment Object
Example
The following code fragment loads "books_comment.xml" into xmlDoc and gets the "(Hardcover)" string form the first comment element:
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
myFunction(xhttp);
}
};
xhttp.open("GET", "books_comment.xml", true);
xhttp.send();
function myFunction(xml) {
var x, i, y, txt,
xmlDoc;
xmlDoc = xml.responseXML;
txt = "";
x = xmlDoc.getElementsByTagName("book")[0].childNodes;
for (i = 0; i < x.length; i++) {
// Process only
comment nodes
if (x[i].nodeType
== 8) {
y = x[i].substringData(33, 11);
txt += y + "<br>";
}
}
document.getElementById("demo").innerHTML = txt;
}
Output:
(Hardcover)
Try it Yourself »
In the example above we use a loop and an if-test to make sure we only process comment nodes. A comment node has a node type of 8.
Definition and Usage
The substringData() method gets a string from the comment node.
Syntax
substringData(start,length)
| Parameter | Description |
|---|---|
| start | Required. Specifies where to begin extracting characters. Start value starts at zero |
| length | Required. Specifies how many characters to extract |
Comment Object
