[Fixed]-{Javascript} How to return Json when calling POST xmlHttpRequest

Django Rest Framwork checks the “Accept” header to define if he must return HTML, JSON, CSV or any other format that he can render (cf: http://www.django-rest-framework.org/api-guide/renderers/)

since you are manually using XMLHttpRequest, try adding the accept header with setRequestHeader. Something like:

xmlHttpRequest.setRequestHeader("Accept","application/json");

check in your console that you are passing the correct headers on Chrome and Firefox

Hope this helps