misc/wasm/wasm_exec.html - go - Git at Google

 <!doctype html>
 <!--
 Copyright 2018 The Go Authors. All rights reserved.
 Use of this source code is governed by a BSD-style
 license that can be found in the LICENSE file.
 -->
 <html>

 <head>
 	<meta charset="utf-8">
 	<title>Go wasm</title>
 </head>

 <body>
 	<!--
 	Add the following polyfill for Microsoft Edge 17/18 support:
 	<script src="https://cdn.jsdelivr.net/npm/text-encoding@0.7.0/lib/encoding.min.js"></script>
 	(see https://caniuse.com/#feat=textencoder)
 	-->
 	<script src="wasm_exec.js"></script>
 	<script>
 		if (!WebAssembly.instantiateStreaming) { // polyfill
 			WebAssembly.instantiateStreaming = async (resp, importObject) => {
 				const source = await (await resp).arrayBuffer();
 				return await WebAssembly.instantiate(source, importObject);
 			};
 		}

 		const go = new Go();
 		let mod, inst;
 		WebAssembly.instantiateStreaming(fetch("test.wasm"), go.importObject).then((result) => {
 			mod = result.module;
 			inst = result.instance;
 			document.getElementById("runButton").disabled = false;
 		}).catch((err) => {
 			console.error(err);
 		});

 		async function run() {
 			console.clear();
 			await go.run(inst);
 			inst = await WebAssembly.instantiate(mod, go.importObject); // reset instance
 		}
 	</script>

 	<button onClick="run();" id="runButton" disabled>Run</button>
 </body>

 </html>
	<!doctype html>
	<!--
	Copyright 2018 The Go Authors. All rights reserved.
	Use of this source code is governed by a BSD-style
	license that can be found in the LICENSE file.
	-->
	<html>

	<head>
	<meta charset="utf-8">
	<title>Go wasm</title>
	</head>

	<body>
	<!--
	Add the following polyfill for Microsoft Edge 17/18 support:
	<script src="https://cdn.jsdelivr.net/npm/text-encoding@0.7.0/lib/encoding.min.js"></script>
	(see https://caniuse.com/#feat=textencoder)
	-->
	<script src="wasm_exec.js"></script>
	<script>
	if (!WebAssembly.instantiateStreaming) { // polyfill
	WebAssembly.instantiateStreaming = async (resp, importObject) => {
	const source = await (await resp).arrayBuffer();
	return await WebAssembly.instantiate(source, importObject);
	};
	}

	const go = new Go();
	let mod, inst;
	WebAssembly.instantiateStreaming(fetch("test.wasm"), go.importObject).then((result) => {
	mod = result.module;
	inst = result.instance;
	document.getElementById("runButton").disabled = false;
	}).catch((err) => {
	console.error(err);
	});

	async function run() {
	console.clear();
	await go.run(inst);
	inst = await WebAssembly.instantiate(mod, go.importObject); // reset instance
	}
	</script>

	<button onClick="run();" id="runButton" disabled>Run</button>
	</body>

	</html>