What is JavaScript?

JavaScript is a dynamic computer programming language. It is lightweight and most commonly used as a part of web pages, whose implementations allow client-side script to interact with the user and make dynamic pages. It is an interpreted programming language and object-oriented also.

What are JavaScript Data Types?

There is six basic data type in JavaScript, which can be divided into three main categories:

Primitive data types:

~String, Number, Boolean.

Composite data types:

~Object, Array, Function.

Special data types:

~Undefined and null.

What is the use of isNaN function?

The isNaN() function checks whether a value is an illegal number that means it…

What is React?

React is a JavaScript library developed by Facebook. ReactJS offers some great solutions to some of front-end programming’s most persistent issues, allowing you to build dynamic and interactive web apps with ease. It’s fast, scalable, flexible, powerful, and has a robust developer community that’s rapidly growing. There’s never been a better time to learn React.

What is DOM?

The Document Object Model or DOM is created by the browser when a webpage is loaded. In graphical form, it's like a tree of elements also called nodes, which are used to represent every single element on the page.

What is virtual DOM in React?

The Virtual DOM is a tree…

There is lots of topic on javaScript we all need to learn about them, today we will discuss 10 topics among them


Expressions are questions that JavaScript can answer. JavaScript answers

expressions in the only way it knows how — with values.

There are many questions JavaScript can’t answer. If you want to know

whether it’s better to confess you're true feelings to your best friend or to keep

waiting until you both turn into skeletons, JavaScript won’t be of much help.

But there are some questions that JavaScript would be ​delighted​ to answer.

These questions have a special name…

Why JavaScript?

JavaScript as an industry is booming, with major vendors like Microsoft, Google and Apple integrating JavaScript into their products. JavaScript is becoming the primary programming language used in web development, with web browsers driving the adoption of JavaScript to better enable the web itself to interact with user interfaces. JavaScript has become widely known as the JavaScript language, but it’s been around since the 1990s as a part of the ECMA specification (The Ecma International Consortium). In fact, the origin of JavaScript was taken from a project by Tim Berners-Lee at CERN (The European Organization for Nuclear Research).

JavaScript Fundamentals

JavaScript is…

Javascript is a programming language for the web. its syntax is based totally on java and c languages. used in both the front-end and back-give up of many platforms, javascript has end up a popular. for each animated or interactive object you spot online, probabilities are javascript is concerned.

Javascript’s language is broadly used to create a more interactive the front-stop. nevertheless, it is utilized in competition with other languages to create internet scrapers, servers, and lots of different equipment. that is due to the languageAnd layout decisions made when creating the language.

Consistent with the 2020 stack overflow developer…

Reactjs is a javascript library for building reusable user interface components. it’s far a template-based language combined with exclusive features that aid the html. our recently updated react interview questions can help you crack your next interview. this indicates the end result of any react’s operation is an html code. you may use reactjs to construct all kinds of unmarried-web page packages.

Quick questions about react:
1.what is the modern day model of react?
Ans:17.0.2, launched on march 22,2021.
2.whilst was react first released?
Ans: twenty ninth may also 2013
Three.react js is created with the aid of jordan walke license of reactjs mit…

Rokonuzzaman Robin

Junior React Developer

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