Question

I am trying to open a debug window within Javascript. Javascript will pass the debug window a JSON string which JSONView (a Chrome extension) should display in a nicely formatted way.

For this to work the MIME type must be “application/json“. Is it possible to send the mime type and JSON string to window.open as a parameter some how? I think the MIME type and content has to be set on window.open otherwise JSONView won’t get triggered.

I did try this, but it did not work:

var x = window.open("about:blank", 'x'); 
var doc = x.document; 
doc.open("application/json"); 
doc.write($(".trend_chart").attr("data-trendChart"))

Answer 1

The document that your opening should be of type “application/json” you cannot send it as a parameter in the window.open method since it’s out of context. The browser instead is the one that determines the file type using the request headers.

window.open("http://www.yoursite.com/file.json", "mywindow");

You should see the json file within JSONView without problems. If the browser still asks you to download the file, your installation of JSONView is probably broken.