c++ from javascript

Question

I need to call a c++ function from the javascript. Please somebody hlp..

Javascript running in the browser? Javascript running on the web server? Please be more specific. — dthorpe
– dthorpe, Commented Dec 15, 2010 at 5:36
and perhaps also state what you're actually trying to do. The solution might not involve c++ (or javascript) at all. — jrharshath
– jrharshath, Commented Dec 15, 2010 at 5:38

kalev · Accepted Answer · 2010-12-15 18:18:26Z

3

If you are talking about a web browser, then running native code from Javascript is usually done by exposing the necessary functions through a web browser plugin. Different web browsers have different ways to write plugins; Firefox and Chrome use NPAPI whereas Internet Explorer uses ActiveX.

There is an open source project called Firebreath which makes it really easy to write cross-platform browser plugins which work on both NPAPI and ActiveX hosts.

http://www.firebreath.org

edited Dec 15, 2010 at 18:18

answered Dec 15, 2010 at 8:26

kalev

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qdot · Accepted Answer · 2010-12-15 05:41:16Z

2

Take a look at WebKit/Qt (assuming you are interested in writing a browser that exports additional features to the JavaScript - special hardware-related API and the likes)

answered Dec 15, 2010 at 5:41

qdot

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1 Comment

Nathan Osman Over a year ago

+1 Very good answer. That's the first thing that popped into my head too.

Ratna Dinakar · Accepted Answer · 2010-12-15 05:42:06Z

2

You can invoke any c++ function after compiling it into dll using javascript by extending Activex Object

like

var myNativeObj= new ActiveXObject("foo.dll");

myNativeObj.someMethod();//Some Method is defined in class

but this is restricted to Internet Explorer browser alone.

answered Dec 15, 2010 at 5:42

Ratna Dinakar

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2 Comments

subair_a Over a year ago

then how to compile a class to dll, please give a step to step example or a link to better tutorial. Its first time I'm working with this kind.. Thanks in advance..

Ratna Dinakar Over a year ago

If you are using VisualC++ you have options creating for DLL within the IDE.

Sergey Miryanov · Accepted Answer · 2010-12-15 05:43:05Z

1

You can write browser extension and use it from javascript code.

NPAPI in Chrome, NPAPI in Mozilla/Firefox

answered Dec 15, 2010 at 5:43

Sergey Miryanov

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aviit · Accepted Answer · 2012-06-29 03:39:53Z

0

In IE, you can use ActiveX.
In Firefox, you can use js-ctypes: https://wiki.mozilla.org/Jsctypes/api
In Chrome, I'm not sure, V8 maybe have a support.

answered Jun 29, 2012 at 3:39

aviit

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