[TypeScript] Dependency-free Promise-based Node.js HTTP client

httpsExchange.ts

// Based on https://www.tomas-dvorak.cz/posts/nodejs-request-without-dependencies/

import * as https from "https";

async function httpsExchange(requestOptions: https.RequestOptions): Promise<string> {
  return new Promise<string>((resolve, reject) => {
    const request = https.request(requestOptions, (response) => {
      if (response.statusCode < 200 || response.statusCode > 299) {
        reject(new Error("Non-2xx status code: " + response.statusCode));
      }

      const body = new Array<Buffer | string>();

      response.on("data", (chunk) => body.push(chunk));

      response.on("end", () => resolve(body.join("")));
    });

    request.on("error", (err) => reject(err));

    request.end();
  });
}

// Usage:

const response = await httpsExchange({
  host: "api.lifx.com",
  path: "/v1/lights/id:" + LIFX_LAMP_ID,
  headers: {"Authorization": "Bearer " + LIFX_TOKEN}
});