How do I make an HTTP request to bitstamp?

Question

I'm trying to use an API from bitstamp to fetch a currency trading price on my webpage.

I have researched this problem, but I still cannot get it to work as it always returns

ERROR

The link used is

https://www.bitstamp.net/api/ticker/

and the response should be

last

Here is my code:

var xhr = new XMLHttpRequest();

xhr.open("GET", "https://www.bitstamp.net/api/ticker/", true);

xhr.send();

xhr.addEventListener("readystatechange", processRequest, false);

function processRequest(e) {

if (xhr.readyState == 4 && xhr.status == 200) {

     var response = JSON.parse(xhr.responseText);

     window.alert(response.last);

}

else {

    window.alert("ERROR");

} }

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Answer 1

Try this:

function loadXMLDoc() {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
    var jsonRes= JSON.parse(this.responseText);
    		if (jsonRes.hasOwnProperty('last')) {
                 alert(jsonRes.last);
    
}
    }
  };
  xhttp.open("GET", "https://www.bitstamp.net/api/ticker", true);
  xhttp.send();
}

<h2>Using the XMLHttpRequest object</h2>

<button type="button" onclick="loadXMLDoc()">Change Content</button>

<p id="demo"></p>

How do I make an HTTP request to bitstamp?

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