Info looks correct, thanks - please feel free to add that to the relevant
wiki page(s).

- Alon



On Sun, Apr 13, 2014 at 11:39 AM, Joshua Litt <[email protected]> wrote:

> Just in case someone comes later and wants to know - to call JS from
> emscripten C++ is a bit non obvious.  The wiki has a few terse lines about
> the procedure, but actually omits some of the details.
>
> First of all, in C++ you do the following:
> extern "C" {
>   extern void my_js(void* a, void* b);
> }
>
> For whatever you want the prototype to be.
>
> Then, you create a JS file which will be linked with your compiled C code.
>  The format of the JS file is odd:
> mergeInto(LibraryManager.library, {
>   my_js: function(a, b) {
>     console.log(a + " " + b);
>     call_into_actual_code(a, b);
>   }
> })
>
> where call_into_actual_code is some other JS function in your normal JS
> frontend.
>
> The final step - you don't include the JS file which is linked in with
> emscripten into your webpage.  The test mentioned in the wiki does have
> this information, but its kind of tough to pick out in a 2500 line python
> file.
>
> I have to say, this is one amazingly awesome project!  Huge thanks to the
> team(also please correct any of the above info if its wrong)
>
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