XML DOM replaceData() Method

Objeto Comment

Definition and Usage

replaceData() Method to replace data in a comment node.

Syntax

commentNode.replaceData(start,length,string)
Parameter Description
start Required. Specifies the position at which to start replacing characters. The starting position is zero.
length Required. Specifies the number of characters to replace.
string Required. Specifies the string to be inserted.

Example

The following code loads "books_comment.xml" into xmlDoc and replaces "Simple" with "Easy" in the comment node of the first <book> element:

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
   if (this.readyState == 4 && this.status == 200) {
       myFunction(this);
   }
};
xhttp.open("GET", "books_comment.xml", true);
xhttp.send();
function myFunction(xml) {
    var x, i, 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) {
            x[i].replaceData(4, 6, "Easy");
            txt += x[i].data + "<br>";
        }
    }
    document.getElementById("demo").innerHTML = txt;
}

Experimente pessoalmente

No exemplo acima, usamos loops e语句 para garantir que apenas nós de comentário sejam tratados. O tipo de nó do nó de comentário é 8.

Objeto Comment