juliandavidmr/compile.sh

## compile.sh
 emcc main.c -O3 -o index.js -s "EXTRA_EXPORTED_RUNTIME_METHODS=['ccall', 'cwrap']"

## lws.config.js
module.exports = {
    mime: {
        'application/wasm': ['wasm']
    }
};

## main.c
#include <stdio.h>
#include <stdlib.h>
#include <emscripten/emscripten.h>

int main(int argc, char ** argv) {
	printf("WebAssembly module loadedn");
	return 0;
}

#ifdef __cplusplus
extern "C" {
#endif

int EMSCRIPTEN_KEEPALIVE myFunction(int argc, char ** argv) {
	printf("MyFunction Called");
	return argc * 2;
}

#ifdef __cplusplus
}
#endif

## main.html
<!DOCTYPE html>
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>WebAssembly Example</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body>
    <button id="myFunction">Call myFunction</button>
    <!-- Include the JavaScript glue code. -->
    <!-- This will load the WebAssembly module and run its main. -->
    <script async src="index.js"></script>
    <script>
    	document.getElementById('myFunction').addEventListener('click', function(ev) {
	    	var result = Module.ccall(
		    'myFunction',     // name of C function
		    'number',       // return type
		    ['number'],     // argument types
		    [42]);          // arguments

		console.log('Result:', result);
    	})
    </script>
  </body>
</html>
	#include <stdio.h>
	#include <stdlib.h>
	#include <emscripten/emscripten.h>

	int main(int argc, char ** argv) {
	printf("WebAssembly module loadedn");
	return 0;
	}

	#ifdef __cplusplus
	extern "C" {
	#endif

	int EMSCRIPTEN_KEEPALIVE myFunction(int argc, char ** argv) {
	printf("MyFunction Called");
	return argc * 2;
	}

	#ifdef __cplusplus
	}
	#endif
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title>WebAssembly Example</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	</head>
	<body>
	<button id="myFunction">Call myFunction</button>
	<!-- Include the JavaScript glue code. -->
	<!-- This will load the WebAssembly module and run its main. -->
	<script async src="index.js"></script>
	<script>
	document.getElementById('myFunction').addEventListener('click', function(ev) {
	var result = Module.ccall(
	'myFunction', // name of C function
	'number', // return type
	['number'], // argument types
	[42]); // arguments

	console.log('Result:', result);
	})
	</script>
	</body>
	</html>