webdriver-javascript.js

// Filename: webdriver-javascript.js
// To setup: npm install -g  selenium-webdriver chromedriver
// To run: node webdriver-javascript.js

// The easiest way to look at this, is it's creating an object that's webdriver.
var webdriver = require('selenium-webdriver'),
  By = webdriver.By,
  until = webdriver.until;
var errorMessage = 'Could not locate the correct ';
let chrome = require('selenium-webdriver/chrome');
let chromedriver = require('chromedriver');

chrome.setDefaultService(new chrome.ServiceBuilder(chromedriver.path).build());

// This is creating an webdriver object which enable interaction with the browser
const browser = new webdriver
  .Builder()
  .usingServer()
  .withCapabilities({
    'browserName': 'chrome',
    'chromeOptions': {
      args: ['headless', 'disable-gpu']
    }
  }).build();

try {
  browser.get('https://duckduckgo.com');
  browser.wait(until.elementLocated(By.name('q')), 3000, errorMessage + 'field').sendKeys('TrumpKlon');
  browser.wait(until.elementLocated(By.id('search_button_homepage')), 3000, errorMessage + 'button').click();
  browser.wait(until.titleIs('TrumpKlon at DuckDuckGo'), 3000, errorMessage + 'title');
  browser.wait(until.elementLocated(By.partialLinkText('TrumpKlon')), 3000, errorMessage + 'link');
}
catch (err) {
  console.log(err);
}
finally {
  browser.quit();
}