TypeScript & WebAssembly
WASM
(module
(func (param $lhs i32) (param $rhs i32) (result i32)
local.get $lhs
local.get $rhs
i32.add))
function computeSum(arr: i32[]): i32 {
var sum = 0
arr.forEach(value => {
sum += value // fails
})
return sum
}
var sum: i32 // becomes a WebAssembly Global
function computeSum(arr: i32[]): i32 {
sum = 0
arr.forEach(value => {
sum += value // works
})
return sum
}
//..................
function computeSum(arr: i32[]): i32 {
var sum = 0
for (let i = 0, k = arr.length; i < k; ++i) {
sum += arr[i] // works
}
return sum
}
npm
$ npm init
$ npm i @assemblyscript/loader
$ npm i -D assemblyscript
$ npx asinit .
$ npm run asbuild
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<p class="title">Web Assembly Example</p>
<script>
WebAssembly.instantiateStreaming(fetch("./build/optimized.wasm"), {
main: {
sayHello() {
console.log("Hello from WebAssembly!");
}
},
env: {
abort(_msg, _file, line, column) {
console.error("abort called at main.ts:" + line + ":" + column);
}
},
}).then(result => {
const exports = result.instance.exports;
document.getElementById("container").textContent = "Result: " + exports.add(19, 23);
}).catch(console.error);
</script>
<p id="container"></p>
</body>
</html>
refs
https://blog.bitsrc.io/typescript-to-webassembly-the-what-the-how-and-the-why-3916a2561d37
https://www.assemblyscript.org/
https://github.com/teambit/bit
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