XML DOM previousSibling property
Node objects Definition and Usage
Before returning element node previousSibling properties immediately (in the same tree hierarchy).
If no such node, this property returns null.
grammar
Tips and Notes
Note: Firefox and most other browsers, the empty spaces between the nodes will generate or wrap as text nodes, while Internet Explorer will ignore whitespace text nodes between nodes generated.Thus, in the example below, we'll use a function that checks the node type of a sibling node.
Node type element node is 1, so if the previous sibling node is not an element node, it will move to the next node, and checks if this node is an element node. The whole process continues until the previous sibling element node is found. Through this method, we can get the right results in all browsers.
Tip: For more information about browser differences, please visit us in our XML DOM tutorial DOM browser section.
Examples
The following code fragment uses loadXMLDoc () to " the Books.xml " into xmlDoc, and get on a sibling nodes from the first <author> element:
Examples
function get_previoussibling(n)
{
x=n.previousSibling;
while (x.nodeType!=1)
{
x=x.previousSibling;
}
return x;
}
xmlDoc=loadXMLDoc("books.xml");
x=xmlDoc.getElementsByTagName("author")[0];
document.write(x.nodeName);
document.write(" = ");
document.write(x.childNodes[0].nodeValue);
y=get_previoussibling(x);
document.write("
Previous sibling: ");
document.write(y.nodeName);
document.write(" = ");
document.write(y.childNodes[0].nodeValue);
The code above will output:
Previous sibling: title = Everyday Italian
try it"
Try Demos
nextSibling - Get the next sibling of a node
Node objects