Set “enctype” attribute to “application/json”
Here is my code for making POST request: function post(path, params, method) { method = method || "post"; // Set method to post by default if not specified. // The rest of this code assumes you are not using a library. // It can be made less wordy if you use one. var form = document.createElement("form"); form.setAttribute("method", method); form.setAttribute("action", path); form.setAttribute("enctype", "application/json"); for(var key in params) { if(params.hasOwnProperty(key)) { var hiddenField = document.createElement("input"); hiddenField.setAttribute("type", "hidden"); hiddenField