[javascript] Make XmlHttpRequest POST using JSON

How can I make an AJAX POST request sending JSON data using vanilla JS.

I understand the content-type is url form encoded and it doesn't support nested JSONs.

Is there any way I can make such a POST request using nested JSON in plain old JS. I've tried the various serialize methods found here on SO but they all flatten my JSON into one format.

Here's my JSON:

   email: "[email protected]",
   response: {
       name: "Tester"

This question is related to javascript json ajax

The answer is

If you use JSON properly, you can have nested object without any issue :

var xmlhttp = new XMLHttpRequest();   // new HttpRequest instance 
var theUrl = "/json-handler";
xmlhttp.open("POST", theUrl);
xmlhttp.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
xmlhttp.send(JSON.stringify({ "email": "[email protected]", "response": { "name": "Tester" } }));

Questions with javascript tag:

need to add a class to an element How to make a variable accessible outside a function? Hide Signs that Meteor.js was Used How to create a showdown.js markdown extension Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Summing radio input values How to execute an action before close metro app WinJS javascript, for loop defines a dynamic variable name Getting all files in directory with ajax Drag and drop menuitems Is it possible to execute multiple _addItem calls asynchronously using Google Analytics? DevTools failed to load SourceMap: Could not load content for chrome-extension TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined raised when starting react app What does 'x packages are looking for funding' mean when running `npm install`? SyntaxError: Cannot use import statement outside a module SameSite warning Chrome 77 "Uncaught SyntaxError: Cannot use import statement outside a module" when importing ECMAScript 6 Why powershell does not run Angular commands? Typescript: No index signature with a parameter of type 'string' was found on type '{ "A": string; } Uncaught Invariant Violation: Too many re-renders. React limits the number of renders to prevent an infinite loop Push method in React Hooks (useState)? JS file gets a net::ERR_ABORTED 404 (Not Found) React Hooks useState() with Object useState set method not reflecting change immediately Can't perform a React state update on an unmounted component UnhandledPromiseRejectionWarning: This error originated either by throwing inside of an async function without a catch block Can I set state inside a useEffect hook internal/modules/cjs/loader.js:582 throw err How to post query parameters with Axios? How to use componentWillMount() in React Hooks? React Hook Warnings for async function in useEffect: useEffect function must return a cleanup function or nothing FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory in ionic 3 How can I force component to re-render with hooks in React? What is useState() in React? How to call loading function with React useEffect only once Objects are not valid as a React child. If you meant to render a collection of children, use an array instead How to reload current page? Center content vertically on Vuetify Getting all documents from one collection in Firestore ERROR Error: Uncaught (in promise), Cannot match any routes. URL Segment How can I add raw data body to an axios request? Sort Array of object by object field in Angular 6 Uncaught SyntaxError: Unexpected end of JSON input at JSON.parse (<anonymous>) Axios Delete request with body and headers? Enable CORS in fetch api Vue.js get selected option on @change Bootstrap 4 multiselect dropdown Cross-Origin Read Blocking (CORB) Angular 6: How to set response type as text while making http call

Questions with json tag:

Use NSInteger as array index Uncaught SyntaxError: Unexpected end of JSON input at JSON.parse (<anonymous>) HTTP POST with Json on Body - Flutter/Dart Importing json file in TypeScript json.decoder.JSONDecodeError: Extra data: line 2 column 1 (char 190) Angular 5 Service to read local .json file How to import JSON File into a TypeScript file? Use Async/Await with Axios in React.js Uncaught SyntaxError: Unexpected token u in JSON at position 0 how to remove json object key and value.? JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value How to format JSON in notepad++ No String-argument constructor/factory method to deserialize from String value ('') Returning JSON object as response in Spring Boot TypeError: Object of type 'bytes' is not JSON serializable How to send json data in POST request using C# Passing headers with axios POST request How to convert JSON string into List of Java object? npm notice created a lockfile as package-lock.json. You should commit this file RestClientException: Could not extract response. no suitable HttpMessageConverter found Load json from local file with http.get() in angular 2 Angular: 'Cannot find a differ supporting object '[object Object]' of type 'object'. NgFor only supports binding to Iterables such as Arrays' How to loop through a JSON object with typescript (Angular2) How to push JSON object in to array using javascript How to check if a key exists in Json Object and get its value REST API - Use the "Accept: application/json" HTTP Header react router v^4.0.0 Uncaught TypeError: Cannot read property 'location' of undefined ASP.NET Core return JSON with status code python JSON object must be str, bytes or bytearray, not 'dict Writing JSON object to a JSON file with fs.writeFileSync Convert a JSON Object to Buffer and Buffer to JSON Object back How to parse JSON in Kotlin? How to convert FormData (HTML5 object) to JSON console.log(result) returns [object Object]. How do I get result.name? tsconfig.json: Build:No inputs were found in config file Python - How to convert JSON File to Dataframe How to define Typescript Map of key value pair. where key is a number and value is an array of objects Retrofit 2: Get JSON from Response body Refused to execute script, strict MIME type checking is enabled? Decode JSON with unknown structure How to parse a JSON object to a TypeScript Object Deserialize Java 8 LocalDateTime with JacksonMapper Getting an object array from an Angular service Python - Convert a bytes array into JSON format Passing bash variable to jq Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $ What is the difference between json.load() and json.loads() functions Import JSON file in React using setTimeout on promise chain Make XmlHttpRequest POST using JSON

Questions with ajax tag:

Getting all files in directory with ajax Cross-Origin Read Blocking (CORB) Jquery AJAX: No 'Access-Control-Allow-Origin' header is present on the requested resource Fetch API request timeout? How do I post form data with fetch api? Ajax LARAVEL 419 POST error Laravel 5.5 ajax call 419 (unknown status) How to allow CORS in react.js? Angular 2: How to access an HTTP response body? How to post a file from a form with Axios console.log(result) returns [object Object]. How do I get result.name? $http.get(...).success is not a function What is difference between Axios and Fetch? Make XmlHttpRequest POST using JSON React Js: Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0 Response to preflight request doesn't pass access control check How can I send an Ajax Request on button click from a form with 2 buttons? API Gateway CORS: no 'Access-Control-Allow-Origin' header Download pdf file using jquery ajax Getting request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource AngularJS POST Fails: Response for preflight has invalid HTTP status code 404 Why my $.ajax showing "preflight is invalid redirect error"? "Mixed content blocked" when running an HTTP AJAX operation in an HTTPS page Jquery in React is not defined Laravel csrf token mismatch for ajax POST Request How to write data to a JSON file using Javascript loading json data from local file into React JS Load More Posts Ajax Button in WordPress jQuery ajax request being block because Cross-Origin CORS header 'Access-Control-Allow-Origin' missing How do I cancel an HTTP fetch() request? Send form data with jquery ajax json How to refresh table contents in div using jquery/ajax Ajax post request in laravel 5 return error 500 (Internal Server Error) React JS - Uncaught TypeError: this.props.data.map is not a function Uncaught TypeError: Cannot read property 'appendChild' of null Required request body content is missing: org.springframework.web.method.HandlerMethod$HandlerMethodParameter No 'Access-Control-Allow-Origin' header is present on the requested resource error Synchronous XMLHttpRequest warning and <script> React.js create loop through Array Reinitialize Slick js after successful ajax call jQuery has deprecated synchronous XMLHTTPRequest How to call a php script/function on a html button click jQuery Refresh/Reload Page if Ajax Success after time Solve Cross Origin Resource Sharing with Flask Stupid error: Failed to load resource: net::ERR_CACHE_MISS SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data Windows.history.back() + location.reload() jquery AJAX jQuery refresh div every 5 seconds Dynamically add item to jQuery Select2 control that uses AJAX