const typescript = require("typescript");

const result = typescript.transpileModule(`let s:string = "string"`, {
    compilerOptions: {
        target: "es5",
        module: typescript.ModuleKind.None // I don't need module!!
    }
});

console.log(result.outputText)

"use strict";
var s = "string";

"use strict";
Object.defineProperty(exports, "__esModule", { value: true }); // I cannot run this in browsers!!
var s = "string";