XML DOM μέθοδος compareDocumentPosition()

Ορισμός και χρήση

compareDocumentPosition() Παράγεται η σύγκριση της θέσης δύο κόμβων στο δομικό επίπεδο (έγγραφο) της μεθόδου.

Syntax

nodeObject.compareDocumentPosition(node)

Parameters

Technical Details

Example

The following code loads "books.xml" into xmlDoc and compares the positions of two nodes (the first and third <book> elements) in the DOM hierarchy:

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 xmlDoc = xml.responseXML;
    var x = xmlDoc.getElementsByTagName('book')[0];
    var y = xmlDoc.getElementsByTagName('book')[2];
    document.getElementById("demo").innerHTML =
    x.compareDocumentPosition(y);
}

Try it yourself

Most browsers treat whitespace or new lines as text nodes, but not Internet Explorer 9 and earlier versions. Therefore, in the above example, most browsers will output 4, while Internet Explorer 9 and earlier versions will output 2.

浏览器支持

所有主流浏览器都支持 compareDocumentPosition() 方法。

注释：Internet Explorer 9 及更早版本不支持此方法。