In javascript, const is considered to be more powerful than var.Once used to store a variable it can’t be reassigned.In simple words, it is an immutable variable except when used with objects. They both have their own way of storing variables.Ĭonst: The const keyword is mainly used to store that variable who’s value is not going to be changed.Consider an example where you are creating a web application where you want to store a variable whose value is not going to change, then const is definitely the best choice to store that variable. With a focus on simplicity and readability. But it had some serious issues, also it was not developers’ favorite so in the ES6 version, we were introduced to const and let keywords which allows us to store variables. ES6 (ECMAScript 2015) is a major update to JavaScript that includes dozens of new features. Let’s take a look at them one by one.īefore ES6 we mainly made use of the var keyword whenever we wanted to declare a variable. It’s fair to say that with the use of ES6 features we write less and do more, hence the term ‘write less, do more’ definitely suits ES6.ĮS6 introduced several key features like const, let, arrow functions, template literals, default parameters, and a lot more. Javascript ES6 has been around for a few years now, and it allows us to write code in a clever way which basically makes the code more modern and more readable. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.Python Backend Development with Django(Live).Android App Development with Kotlin(Live).Full Stack Development with React & Node JS(Live).Java Programming - Beginner to Advanced.

Data Structure & Algorithm-Self Paced(C++/JAVA).

Data Structures & Algorithms in JavaScript.

Data Structure & Algorithm Classes (Live).

Objects make it easy to create and dynamically change properties and are fundamental to JavaScript programming. Objects allow you to build and extend custom data types. Similar to a dictionary or hash map, objects are a collection of key/value pairs which can be modified throughout the object's life cycle. Objects allow you to define your own data types in JavaScript.

What is es6 javascript