XMLHttpRequest throwing InvalidSateError saying “Object state must be opened”

Question

The code -

\"use strict\";

var AJAX = function (params) {
    this.server ={};
    this.url = params.url;
    this.method = params.method;         


        

Answer 1

You probably need to open the connection after the XMLHttpRequest call and before the setRequestHeader call Instead of:

        this.server = new XMLHttpRequest();
        this.server.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');

i think you need to do:

        this.server = new XMLHttpRequest();
        this.server.open(this.method, this.url, true);
        this.server.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');

also make sure you remove this line in the init(), like you have done above.