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01. What is JavaScript?

JavaScript is a lightweight interpreted or just-in-time compiled programing language. It’s also prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative.

2. What is DOM?

DOM stands for Document Object Model. It’s prepared to ready JavaScript object from HTML file for easily can take access, modify or update in future real-time access when the browser parses or read any HTML files.

3. What is the difference between null & undefined?

A few ways to get undefined such as not assigned variable’s value, not passed the function parameter, and searched non-existing array elements.
Null means an empty or non-existent value. Null is assigned and explicitly means nothing.

4. What is the difference between the operators ‘==‘ & ‘===‘?

Double equal(‘==’) only compares…

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What is React JS?

React is one of the most popular JavaScript libraries for building user interfaces. React Js is the most powerful library build by Facebook. Some people seem to think React Js is a framework. But React Js is not a complete solution you will often need to use more libraries to complete your projects.

1. Virtual DOM

DOM represents Document Object Model. The Virtual DOM is the programming concept where virtually represents a UI stored in memory and renders or synced with Real DOM by a React DOM library. It’s called reconciliation.

2. React Js Tree Reconciliation

When React renders tree elements in the browser it first generates virtual…

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Javascript is the most popular programming language. I say — One language for all platforms. You can build web applications, mobile applications (ios, android), desktop applications, and also build IoT-based applications. So, Why not keep learning JavaScript? I’ll discuss the 10 things most important JavaScript things that will you the Smarter JavaScript programmer. So Let’s start:


Every programming language has data types. JavaScript has also data types. There are 9 data types in JavaScript.

2. Event Loop

The event is the most important topic that how JavaScript works as well. The event loop is…

JavaScript- one Language for all platforms

What is JavaScript?

JavaScript is a lightweight, interpreted, or just in time compiled programming language. It’s is a multi-paradigm, dynamic, and single-threaded programming language. Before released ES6, many people said, it’s a toy language, but after releasing ES6 it’s changed and added amazing new features. I’m going to share more details.


There are 3 variables name in javascript: Let, Const and Var. Let’s discuss 3 variables.
1. Let
It’s a new variable of JavaScript which added from ES6. Let variable can declared block level variables and it’s available from itself enclosed in. It’s not accessible from out of itself enclosed block. …

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