Untitled

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>wsam sample</title>
<script>
'use strict';

(()=>{
	const wasmBin = new Uint8Array([
			// module header
		0x00, 0x61, 0x73, 0x6d,	// magic number
		0x01, 0x00 ,0x00, 0x00,	// version

		// --------------------------
		// Type section
			// section header
		0x01,	// section code: Type section
		0x06,	// payload bytes

			// section payload data
		0x01,	// number of entries

			// entry 0
		0x60,	// form (func)
		0x01,	// number of params
		0x7F,	// param 1: i32
		0x01,	// number of return values
		0x7F,	// return value type: i32

		// --------------------------
		// Import section
			// section header
		0x02,	// section code: Import section
		0x0B,	// payload bytes

			// section payload data
		0x01,	// number of entries

			// entry 0
		0x03,	// import module name length
			// import module (UTF-8): 'mod'
		0x6D, 0x6F, 0x64,
		0x03,	// import field name length
			// import field (UTF-8): 'fnc'
		0x66, 0x6E, 0x63,
		0x00,	// import external kind: Function
		0x00,	// import index: Type entry 0


		// ---------------------------
		// Function section
			// section header
		0x03,	// section code: Function section
		0x02,	// payload bytes

			// section payload data
		0x01,	// number of entries
		0x00,	// entry 0: Type entry 0

		// ---------------------------
		// Export section
			// section header
		0x07,	// section code: Function section
		0x07,	// payload bytes

			// section payload data
		0x01,	// number of entries

			// entry 0
		0x03,	// export name length
			// export name (UTF-8): 'inc'
		0x69, 0x6E, 0x63,
		0x00,	// external kind: Function
		0x01,	// export index: Function entry 0

		// ----------------------------
		// Code Section
			// section header
		0x0A,	// section code: Code section
		0x10,	// payload bytes

			// section payload data
		0x01,	// number of function bodies

			// function body 0: function entry 0
		0x0E,	// body size
		0x01, 	// number of local entries
			// local entry 0
		0x01,	// number of local variables
		0x7F,	// local valiable 0 type: i32
			// byte codes
		0x20, 0x00,	// get_local 0
		0x41, 0x01,	// i32.const 1
		0x6A,		// i32.add
		0x10, 0x00,	// call function entry 0
		0x41, 0x01,	// i32.const 1
		0x6A,		// i32.add
		0x0B,	// end of function

	]);

	document.addEventListener('DOMContentLoaded', ()=>{
		WebAssembly.instantiate(wasmBin, {
			mod: {
				fnc: (x)=>{
					alert(x);
					return x + 10;
				}
			}
		}).then((obj)=>{
			const resultVal = obj.instance.exports.inc(10);
			document.getElementById('resultDiv').appendChild(document.createTextNode(
					'resultVal=' + resultVal
					));
		}).catch((err)=>{
			console.log(err);
			document.getElementById('resultDiv').appendChild(document.createTextNode(
					'error'));
		});
	});
})();
</script>
	</head>
	<body>
		<div id="resultDiv"></div>
	</body>
</html>