JavaScript Course for Beginners – Your First Step to Web Development

In this 3-minute introduction, I'm going to answer four frequently asked questions

about JavaScript. What is JavaScript, what can you do with

it, where does JavaScript code run and what is the difference between

JavaScript and ECMAScript. So let's start with the first question. What is

JavaScript? JavaScript is one of the most popular and widely used programming

languages in the world right now. It's growing faster than any other

programming languages and big companies like Netflix, Walmart, and PayPal build

entire applications around JavaScript. And here's the average salary of a

JavaScript developer in the United States. That is $72,000 a year. So

it's a great opportunity to get a good job out of learning JavaScript. You can

work as a front-end developer or a back-end developer or a full stack

developer who knows both the front end and the back end. Now, the second question.

What can you do with JavaScript? For a long time,

javascript was only used in browsers to build interactive web pages some

developers refer to javascript as a toy language but those days are gone because

of huge community support and investments by large companies like

Facebook and Google these days you can build full-blown web or mobile apps as

well as real time networking applications like chats and video

streaming services command-line tools or even games here's an example a third

question where does JavaScript code run javascript was originally designed to

run only in browsers so every browser has what we call a JavaScript engine

that can execute JavaScript code for example the JavaScript engines in

firefox and chrome are SpiderMonkey and v8 in 2009 a very clever engineer called

Ryan Dahl took the open-source JavaScript engine in chrome and embedded

it inside a C++ program he called that program node the node is a C++ program

that includes Google's v8 JavaScript engine now with this we can run

JavaScript code out of a browser so we can pass our

JavaScript code to node for execution and this means with JavaScript we can

build the backend for our web and mobile applications so in a nutshell JavaScript

code can be run inside of a browser or in node browsers and node provide a

runtime environment for our JavaScript code and finally the last question what

is the difference between JavaScript and Eggman script well ECMO script is just a

specification javascript is a programming language that confirms to

this specification so we have this organization called a comma which is

responsible for defining standards they take care of this Eggman script

specification the first version of Eggman script was released in 1997 then

starting from 2015 ACMA has been working on annual releases

of a newest specification so in 2015 they released a kimono script 2015 which

is also called ECMO script version 6 or es6 for short this specification defined