node_modules/selenium-webdriver/example/logging.js

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/**
 * @fileoverview Demonstrates how to use WebDriver's logging sysem.
 */

'use strict';

const {Builder, By, Key, logging, until} = require('..');

logging.installConsoleHandler();
logging.getLogger('webdriver.http').setLevel(logging.Level.ALL);

var driver = new Builder().forBrowser('firefox').build();

driver.get('http://www.google.com/ncr')
    .then(_ =>
        driver.findElement(By.name('q')).sendKeys('webdriver', Key.RETURN))
    .then(_ => driver.wait(until.titleIs('webdriver - Google Search'), 1000))
    .then(_ => driver.quit());