js async function

async.js

const http = require("http");
const util = require("util");

function post(payload) {
  return new Promise((resolve, reject) => {
    const options = {
      method: "POST",
      hostname: "httpbin.org",
      port: 80,
      path: "/post"
    };

    const req = http.request(options, res => {
      res.setEncoding("utf8");
      let body;

      res.on("data", chunk => {
        body = chunk;
      });

      res.on("end", () => {
        resolve(body);
      });
    });

    req.on("error", err => {
      reject(err);
    });

    req.write(util.format("%j", payload));
    req.end();
  });
}

// post("foobar")
//   .then(res => {
//     console.log(res);
//   })
//   .catch(err => {
//     console.log(err);
//   });

async function asyncFunc() {
  try {
    const response = await post("foobar");
    console.log(response);
  } catch (err) {
    throw err;
  }
}