Automatic Website Login with Puppeteer

login.js

const puppeteer = require('puppeteer');
var url = "https://example.com";
var username = "test";
var password = "password";

(async () => {
  const browser = await puppeteer.launch({ignoreHTTPSErrors: false, headless: false});
  const page = await browser.newPage();
  page.on('dialog', async dialog => {
        console.log("found dialog")
        await dialog.accept();});
  await page.goto(url);
  await page.waitForSelector('input[name="username"]');
  console.log("logging in...");
  await page.type('input[name="username"]', username);
  await page.type('input[name="password"]', password);
  await page.click('button[type="submit"]'); 
  console.log("done")
})();