/// <reference types="node" /> // TypeScript Test class Student { fullName: string; constructor(public firstName: string, public middleInitial: string, public lastName: string) { this.fullName = firstName + " " + middleInitial + " " + lastName; } } interface Person { firstName: string; lastName: string; } function greeter(person : Person) { return "Hello, " + person.firstName + " " + person.lastName; } let user = new Student("Jane", "M.", "User"); document.body.innerHTML = greeter(user); JSON.stringify() console.log("Hello world"); import http = require("http"); import path = require("path"); import URL = url.URL; import { Readable, Writable } from "stream"; import { isBuffer, isString, isObject } from "util"; const port = 8__88___8; const baseUrl = new URL(`http://localhost:${port}/`); const rootDir = path.dirname(__dirname); const defaultBrowser = os.platform() === "win32" ? "edge" : "chrome"; let browser: "edge" | "chrome" | "none" = defaultBrowser; let grep: string | undefined; interface FileBasedTestConfiguration { [setting: string]: string; } function swapCase(s: string): string { return s.replace(/\w/g, (ch) => { const up = ch.toUpperCase(); return ch === up ? ch.toLowerCase() : up; }); }