In this article I want to discuss some important topics about javaScript interview questions.

This two are comparison operators. Here double equal(==) operator is used to compare values. Triple equal(===) operator is used to compare values and also check the types. This is the main difference between them.


React is a popular JavaScript-based library used for building user interfaces with a component-based architecture approach. React is a library for building composable user interfaces. It encourages the creation of reusable UI components, which present data that changes over time.

It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications.

Components are one of the things that make React…well, React! They are one of the primary ways you have for defining the visuals and interactions that make up what people see when…


In this article I want to discuss about some important topics about javaScript functions.

JavaScript Function

Function is building a block of javascript. It is group of code statements which performs some specific task with or without taking input. Function can be defined two different ways:

  1. Function Declaration
  2. Function Expression

Function Declaration: To declare a javascript function use function keyword with it’s function name. Function can also return a value when called. Use return keyword to return a value.


Array is a very special concept in any programming language. All the major programming languages support the array data structure. As a beginner, let’s try to understand what an array is from a common man’s perspective.

JavaScript Array Methods

Array.concat(): The concat() method is used to merge two or more arrays. This method does not change the existing arrays, but instead returns a new array.

Mohammad saidul

I have held responsible positions in specializing as Front-end Developer with sound knowledge over ReactJS for frontend and NodeJs for API Services.

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