run.js

const wasmFile = require('path').resolve(__dirname, './main.wasm');
//const assert = require('assert');
const fs = require('fs');
const { execSync } = require('child_process');
const wasmExec = execSync('go env GOROOT').toString().replace(/\n/g, '') + '/misc/wasm/wasm_exec.js';
require(wasmExec);

// isWait 代表是否要等到go代码执行结束之后再执行js代码
// 如果存在js调用go方法，那就不能等
const launch = async (file, isWait) => {
    const buf = fs.readFileSync(file);
    const go = new global.Go();
    return WebAssembly.instantiate(buf, go.importObject).then(result => {
        if (isWait) {
            // 这个await执行完成代码go代码已经执行结束退出了
            return go.run(result.instance);
        } else {
            go.run(result.instance);
        }
        return;
    });
}
//global.run(File content []utf8, args string)
launch(wasmFile).then(async () => {
    let cmd_args = process.argv.slice(2)
    const buf = fs.readFileSync(cmd_args[0]+".class");
    await console.log(global.run(buf, cmd_args[1]));
    console.log(process.memoryUsage().heapUsed / 1024);
});