Can JavaScript set the mime type on window.open - Stack Overflow

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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"))

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"))

• javascript
• mime-types

Share Improve this question Follow edited May 8, 2014 at 7:39 hakre 198k5555 gold badges447447 silver badges855855 bronze badges asked Oct 10, 2011 at 2:16 Vanson SamuelVanson Samuel 2,09922 gold badges1818 silver badges3131 bronze badges

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2 Answers 2

Sorted by: Reset to default 2

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./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.

It is not possible.

You'd be better off doing:

console.log(JSON.parse($(".trend_chart").attr("data-trendChart")));

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