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JavaScript ES6 vs Old JavaScript: What’s the Difference?

Introduction

JavaScript is one of the most popular programming languages in the world. It is used to create interactive web pages and applications. JavaScript has been around for a long time, and it has gone through several major updates over the years. The latest version of JavaScript is ES6, which was released in 2015. In this article, we’ll take a look at the differences between ES6 and the older versions of JavaScript.

What is ES6?

ES6, also known as ECMAScript 6, is the sixth major version of the JavaScript programming language. It was released in 2015 and is the most recent version of JavaScript. ES6 includes a number of new features and syntax changes that make it easier to write and maintain code. Some of the most notable features of ES6 include:

  • Arrow functions
  • Template literals
  • Classes
  • Promises
  • Modules
  • Destructuring
  • Default parameters
  • Spread operator

What is Old JavaScript?

Old JavaScript is any version of JavaScript prior to ES6. This includes ES5, which was released in 2009, and all earlier versions. Old JavaScript is still widely used, and many developers prefer it over ES6 due to its simplicity and familiarity. Some of the features of old JavaScript include:

  • Functional programming
  • Object-oriented programming
  • Prototypal inheritance
  • Closures
  • Hoisting
  • Event handling

Differences Between ES6 and Old JavaScript

The main difference between ES6 and old JavaScript is the syntax. ES6 introduces a number of new features and syntax changes that make it easier to write and maintain code. For example, ES6 includes arrow functions, which are a shorthand way of writing functions. It also includes template literals, which allow you to easily create strings with variables. ES6 also introduces classes, which are a way of creating objects with a specific structure. Old JavaScript does not have these features, so developers must use different syntax to achieve the same results.

Another difference between ES6 and old JavaScript is the way modules are handled. ES6 introduces a new way of importing and exporting modules, which makes it easier to manage code. Old JavaScript does not have this feature, so developers must use different methods to manage their code.

Finally, ES6 introduces a number of new features that make it easier to work with data. These include destructuring, which allows you to easily extract data from objects, and the spread operator, which allows you to easily spread data across multiple variables. Old JavaScript does not have these features, so developers must use different syntax to achieve the same results.

Summary

JavaScript ES6 and old JavaScript are two different versions of the same programming language. ES6 introduces a number of new features and syntax changes that make it easier to write and maintain code. Old JavaScript is still widely used, and many developers prefer it due to its simplicity and familiarity. Ultimately, the choice of which version to use depends on the needs of the project.


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