What is JavaScript Definition Full Detail

What is JavaScript and what can it do

We have given you information about many programming languages ​​before this, but today we will tell you what is JavaScript, why is it used? If you want to become a programmer, then it is very important to choose the right language before learning any language. When you search for any information on the Internet, you browse many web pages which are written in different languages. Similarly, despite having a programming language like Python, Java, PHP, C++, why should you use JavaScript.

JavaScript is a powerful scripting language, which is used to create web pages and applications. You should learn it because today about 95% of websites are using it as a web technology. Almost every web developer says that in the coming time, JavaScript has the most scope.

In this post, we will give you complete information about it so that you can understand what you need to know to learn it. So let’s first know what is JavaScript.

Topics

• What is JavaScript
• Some Important Points to Understand JavaScript Definition
• History of JavaScript
• Some Basics of Javascript
• what is the use of javascript
• how to learn javascript
• Some Advantages of JavaScript
• Conclusion

What is JavaScript

JavaScript is called JS in programming language. It is an interpreted programming language with object-oriented capabilities. It is also called dynamic computer programming language. Its program is called Script. Using this, you can implement different types of things in web pages. Its scripts can be provided and executed as plain text.

JavaScript is one of the three main technologies of the World Wide Web (WWW) after HTML and CSS. All the main websites on the Internet use it. Because it enables interactive web pages, that is why it is used a lot in creating web applications. It is very lightweight, due to which JavaScript is used as a large part of the web page nowadays.

Initially its name was LiveScript, not JavaScript. But after that Netscape which is a web services company changed its name and today we know it as JavaScript. Many people find Java and JavaScript to be the same language, but both are completely different from each other. The reason that their name is similar is that Java was very popular at that time, due to which its name was also kept similar so that people would consider it the same.

But after being developed today JavaScript has become an independent language with its ECMAScript. Today it can be executed not only in the browser but also in the server. If you want to know what a server is, then read this post.

Some Important Points to Understand JavaScript Definition

1 JavaScript is a client-side scripting language. Whose source code is processed by the server instead of the client’s web browser.

2 Using this, you can add HTML to any web page. Also, you can change the existing content and can also modify the page style.

3 It was originally developed to add dynamic and interactive elements to websites.

4 It is an open and cross-platform which aims to provide a better experience for the user.

5 Like PHP and ASP, JavaScript code can be placed anywhere within the HTML of a web-page.

6 Cookies can be obtained and set with the help of JavaScript. It is also used to ask questions to visitors and to do massage shows.

History of JavaScript

JavaScript was invented in 1995 by a Netscape communication corporation programmer named Brendan Eich. It took only 10 days to make this scripting language. At that time it was initially named Mocha, after which it was changed to LiveScript and finally to JavaScript.

Although its official name was given ‘ECMAScript’, but even then people used to call it JavaScript. It was first used in the Netscape browser version 2.0B3 in December 1995. After this, ECMAScript 2 and 3 were released in 1998, which is today’s modern JavaScript.

Nowadays almost all the big websites even Google, Facebook also use JavaScript. At that time Netscape had a very strong presence in the young web. Netscape Communicator which was the first browser of NCSA became very popular. But later when Microsoft created the internet explorer, its popularity decreased significantly.

Some Basics of Javascript

JavaScript Syntax

JS Syntax refers to a set of rules. Which determines how the language will be written by a programmer and interpreted by the browser. JavaScript is implemented in a web page using JavaScript statements placed within the <script> html tag.

You can place the script tag anywhere within your web page, but the recommended way is to keep it within the head> tag. The purpose of using this is that it alerts the browser program to start interpreting all the text used between these tags as script.

JavaScript Variables

Like many other programming languages, JavaScript has variables. It is loosely typed, which means that it does not require a data type to be declared. You can specify any type of literal values ​​for the variable. Variables must be declared before you can use them in a JavaScript program. They are declared with Var Keyword as follows.

JavaScript Operators

These operators are used to specify values, compare values, perform arithmetic operations and much more. For example 2+3 = 5. Here 2 and 3 are called operands and expression ‘+’ is called operator.

JavaScript supports the following types of operators:

Arithmetic operators
Comparison operators
Assignment operators
Conditional operators

JavaScript Functions

It is a block of code, which is designed to complete a particular task. This eliminates the need to write a code over and over again. It helps the programmer to write module code. Before using any functions, we have to define it. To define a function in JavaScript, we write the keyword before the function, then after writing the function name and parameters list, we close the statement in curly bracket.

So these were some JavaScript basics, there are many other things in it, which are very difficult to tell here. Because this post will be very long, that’s why we will tell you below how you can learn them.

What is the use of javascript

JavaScript is one of the most popular programming language in the world. Which is used to add automations, animations and interactivity to web pages. Web developers use JavaScript to make web pages complex. Let us know what you can do using JavaScript.

Web development is an area where JavaScript is used the most. Because it is a client scripting language, it is used to create web pages. Most of the websites use it for verification.

JavaScript is also used well in creating web applications. Initially, many programming languages ​​were used for the development of technology browser and personal computer. But JavaScript did the job of taking it to the next level. Due to this, such applications were developed, which hardly anyone would have thought about.

Node JS is used to build the web server. Node JS has many advantages, the servers created by it are very fast and do not use buffering. Apart from this, it is single threaded with event looping which is used in a non blocking manner.

JavaScript is also used in creating mobile applications. The most important thing that only JavaScript can do is to create applications without web contexts. With its help, both Android and iOS applications can be made.

These are some of the areas where JavaScript is used more. Apart from this, it is also used in making games and server applications. Well, there are many other things that it can do, but this is the important area.

How to learn javascript

Most people say that JavaScript is very difficult to learn, this is also true to some extent. But if you do not rush to learn it, rather try to understand it first. So you will not have any problem in learning it, some instructions are being given below which will help you to learn JavaScript.

Essential Tools to Learn JavaScript

Code editor – The first and most important tool is the code editor in which you can use Notepad++ or Atom. This is absolutely free tool.

Web browser – You all must have a browser on your PC or laptop because with the help of this we will be able to access the web pages created. Better if you use Chrome, Mozilla or Firefox. Remember that you must update the latest version of your browser.

Firebug tool – This is a web browser extension with the help of which you can do live debugging of HTML, CSS, DOM, XHR and JavaScript of any web page or website. If you use Firefox then you simply have to install it from google and if you use chrome browser then it is already available in it.

To use it in Chrome, you have to right click with the mouse. After which you will see an option of inspect, as soon as you click on it, the complete coding of the current page will appear in front of you.

Resources for learning JavaScript

To learn this programming language, you should know some resources from where you can easily start learning JavaScript. You can also use many paid resources to learn this. But I will tell you about some such online website which is absolutely free and you are given complete guide of JavaScript on them.

Below are the names of five such websites, from where you can easily learn JavaScript:

www.codesikhohindi.com

W3Schools
tutorial point
Codeacademy
JavaScript.info
freecodecamp

Apart from this, you can also learn JavaScript through YouTube videos. Apart from this, you must also follow these coding learning methods.

Some Advantages of JavaScript

By now you must have understood “what is JavaScript” and why it is used. So let us now tell you some of its advantages, due to which you should learn it.

Let us know what are some of the main advantages of JavaScript.

1) JavaScript is a very fast programming language, it can be run immediately in the client side browser. JavaScript is not used by network calls to the backend server unless external resources are required. It does not even need to be compiled on the client side, which is why it gets faster speed. Due to its client side, the demand on the server gets reduced. Due to which the server loads quickly.

2) It is used everywhere. There are many free websites and tools available to learn JavaScript, so that you do not have any problem in learning and implementing it.

3) It can be used with Html, CSS, PHP, C++ or any other language. JavaScript can be inserted into any web page regardless of file extension.

4) It supports all browsers and gives the same result in all. JavaScript syntax is quite easy and flexible.

5) Due to its being an event based language, many code segments are executed when a certain event occurs in JavaScript. In simple language, a code segment is executed when the user clicks on the button or moves the mouse over the object.

Although it has many other benefits, but so many benefits are enough for a programmer. So hopefully, you must have understood why JavaScript is called the programming languages ​​of the future.

Conclusion

So friends, you know what is JavaScript and how to learn JavaScript? Hopefully, by reading this article, you have completely understood what is the use of JavaScript and why it is important to learn it to become a developer? If you have any problem in understanding any topic on this post, then you can ask your question to us in comment. Your question will be answered immediately.

In the end, I have a humble request to you, if you found this post informative, then definitely share it with your friends on Facebook or Twitter.

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