Introduction to Modern JavaScript

Introduction to Modern JavaScript

In the JavaScript / ECMAScript (ES6) tutorial, I’ll explain some major changes that introduced to many new features of modern JavaScript: Variable Scoping, Constants, Arrow Functions, Object Handling, Object.freeze() method, Classes, Destructuring, Promises

If you are a software engineer or undergraduate IT student, you might already work with JavaScript language, since it widely used on both client-side and server-side development. JavaScript is a dynamic and lightweight computer programming language. At first, it was introduced as a scripting language for web development in early 90s by Netscape company. As you already know JavaScript is well-known for the development of web pages, until “node.js” introduced in 2009. With the help of “node.js”, we can use JavaScript outside of the web browsers. As a result, it gained a huge popularity among back-end developers, and for several years, JavaScript has been recognized as the most used programming language in the world.


Even though JavaScript is popular language among developers, it had a bad reputation because of not evolving properly along past years. But with the introduction of ECMAScript 6 (ES6), JavaScript got some major changes and updates. So, what is this ECMAScript?

The acronym ECMA is stand for European Computer Manufacturer’s Association. ECMAScript is a specification for scripting languages such as JavaScript and ActionScript. The ECMA releases standard specifications from time to time. These specifications bring new features to the language which improves the developer experience. As an example ES5 version released with several new array methods named as, “map()”, “reduce()”, “filter()”, along with date functions. When it comes to ES6 version, it is known as one of the biggest ECMAScript release yet. It comes with features such as let/const keywords, classes, destructuring, promises, and so on.

Note: JavaScript has its own features which are not part of these specifications.

In the next chapter, I’ll explain some major changes that introduced in newer versions of ECMAScript.

  • Variable Scoping
  • Constants
  • Arrow Functions
  • Object Handling
  • Object.freeze() method
  • Classes
  • Destructuring
  • Promises

javascript ecmascript es6

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