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AJAX - Server Response


Server Response Properties


Property
Description


responseText
get the response data as a string


responseXML
get the response data as XML data



The responseText Property
The responseText property returns the server response as a
JavaScript string, and you can use it accordingly:

Example

document.getElementById("demo").innerHTML = xhttp.responseText;
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The responseXML Property
The XMLHttpRequest object has an in-built XML parser.
The responseXML property returns the server response as an XML DOM object.
Using this property you can parse the response as an XML DOM object:

Example
Request the file cd_catalog.xml and parse the response:

const xmlDoc = xhttp.responseXML;
const x = xmlDoc.getElementsByTagName("ARTIST");

let txt = "";
for (let i = 0; i < x.length; i++) {
  txt += x.childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo").innerHTML = txt;

xhttp.open("GET",
"cd_catalog.xml");xhttp.send();
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Server Response Methods


Method
Description


getResponseHeader()
Returns specific header information from the server resource


getAllResponseHeaders()
Returns all the header information from the server resource



The getAllResponseHeaders() Method
The getAllResponseHeaders() method returns all header information from the server response.

Example

const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
    document.getElementById("demo").innerHTML =
    this.getAllResponseHeaders();
}
xhttp.open("GET", "ajax_info.txt");
xhttp.send();

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The getResponseHeader() Method
The getResponseHeader() method returns specific header information from the server response.

Example

const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
    document.getElementById("demo").innerHTML =
    this.getResponseHeader("Last-Modified");
}
xhttp.open("GET", "ajax_info.txt");
xhttp.send();

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Reference: https://www.w3schools.com/js/js_ajax_http_response.asp