JavaScript Notes for Professionals

JavaScript Notes for Professionals

This JavaScript® Notes for Professionals book is compiled from Stack Overflow

Documentation, the content is written by the beautiful people at Stack Overflow.

Text content is released under Creative Commons BY-SA, see credits at the end

of this book whom contributed to the various chapters. Images may be copyright

of their respective owners unless otherwise specified

This is an unofficial free book created for educational purposes and is not

affiliated with official JavaScript® group(s) or company(s) nor Stack Overflow. All

trademarks and registered trademarks are the property of their respective

company owners

The information presented in this book is not guaranteed to be correct nor

accurate, use at your own risk

Please send feedback and corrections to web@petercv.com

Chapter 1: Getting started with JavaScript

Version Release Date

1 1997-06-01

2 1998-06-01

3 1998-12-01

E4X 2004-06-01

5 2009-12-01

5.1 2011-06-01

6 2015-06-01

7 2016-06-14

8 2017-06-27

Section 1.1: Using console.log()

Introduction

All modern web browsers, Node.js as well as almost every other JavaScript environments support writing messages

to a console using a suite of logging methods. The most common of these methods is console.log().

In a browser environment, the console.log() function is predominantly used for debugging purposes.

Getting Started

Open up the JavaScript Console in your browser, type the following, and press Enter :

console.log("Hello, World!");

This will log the following to the console:

Download to read more