wasmbuilder

const WasmBuilder = require('wasmbuilder'); const fs = require('fs'); // Initialize the builder const builder = new WasmBuilder(); // Define an 'add' function that takes two i32 and returns one i32. // Its body in WASM bytecode (hex): (local.get 0) (local.get 1) (i32.add) (end) // This translates to the hex string: "200020016a0b" builder.addFunction( "add", // function name for internal use ["i32", "i32"], // parameter types (two 32-bit integers) ["i32"], // return type (one 32-bit integer) "200020016a0b" // WASM bytecode as hex string ); // Export the 'add' function so it can be called from JavaScript builder.exportFunction("add", "add"); // Build the WASM module to get its binary representation const wasmBinary = builder.build(); // Optionally, write the WASM binary to a file fs.writeFileSync('add.wasm', wasmBinary); console.log('add.wasm created successfully.'); // Instantiate and use the generated WASM module (async () => { try { const { instance } = await WebAssembly.instantiate(wasmBinary, {}); const addResult = instance.exports.add(5, 7); console.log(`Result of add(5, 7): ${addResult}`); // Expected output: 12 } catch (e) { console.error("Error instantiating or running WASM module:", e); } })();