We have provided you knowledge about numerous 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 crucial to select the proper language before studying any language.
When you seek any information on the Internet, you visit various websites which are written in different languages. Similarly, why should you utilize JavaScript while having a programming language like Python, Java, PHP, C?
JavaScript is a sophisticated programming language, which is used to construct web pages and apps. You should understand it because currently, around 95 percent of websites are utilizing it as a web technology. Almost every web developer thinks that in the next period, JavaScript has the biggest scope.
In this post, we will offer you comprehensive information about it so that you can grasp what you need to know to study it. So let's first know what is JavaScript.
What is Javascript
JavaScript is called JS in the programming language. It is an interpreted programming language with object-oriented features. It is sometimes called a dynamic computer programming language. Its software is named Script.
Using this, you may incorporate many sorts of things in websites. Its scripts can be supplied and run as plain text.
JavaScript is one of the three core technologies of the World Wide Web (WWW) after HTML and CSS. All the big websites on the Internet utilize it. Because it permits interactive web pages, that is why it is used a lot in developing online apps.
It is incredibly lightweight, due to which JavaScript is utilized as a key component of the web page nowadays.
Initially, its name was LiveScript, not JavaScript. But after that Netscape which is a web services business changed its name and today we know it as JavaScript. Many people perceive Java and JavaScript to be the same language, yet both are entirely distinct from each other.
The reason that their names are similar is that Java was highly popular at that time, due to which its name was also maintained similar so that people would think it the same.
But after being developed today JavaScript has become an independent language with its ECMAScript. Today it may be run not only in the browser but also on 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 handled by the server instead of the client's web browser.
2. Using this, you may add HTML to any web page. Even, you can update the current content and can also adjust the website appearance.
3. It was initially created to bring dynamic and interactive features to web pages.
4. It is an open and cross-platform which strives to give a better experience for the user.
5. Like PHP and ASP, JavaScript code may be inserted anywhere inside the HTML of a web page.
6. Cookies may be acquired and set with the assistance of JavaScript. It is also used to ask questions to visitors and to perform massage demonstrations.
History of JavaScript
JavaScript was created in 1995 by a Netscape communication business programmer named Brendan Eich. It took only 10 days to develop this programming language. At that time it was first dubbed Mocha, following which it was renamed LiveScript and eventually to JavaScript.
Although its official name was given 'ECMAScript', yet even then people continued to call it JavaScript. It was originally 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 contemporary JavaScript.
Nowadays virtually all large websites like Google, Facebook also utilize JavaScript. At that time Netscape had a very strong presence in the fledgling web. Netscape Communicator which was the initial browser of NCSA became highly popular.
But later when Microsoft launched the internet explorer, its popularity fell considerably.
Some Basics of Javascript
JavaScript Syntax
JS Syntax refers to a collection of rules. Which controls how the language will be authored by a programmer and interpreted by the browser. JavaScript is implemented in a web page using JavaScript statements put within the <script> Html tag.
You may insert the script tag anywhere inside your web page, but the preferred approach is to keep it within the <head> element. The objective of employing this is that it notifies the browser program to start interpreting all the text used between these tags as the script.
JavaScript Variables
Like many other programming languages, JavaScript contains variables. It is weakly typed, which implies that it does not require a data type to be defined. You can give any type of literal value for the variable. Variables must be declared before you may utilize them in a JavaScript application. They are declared using Var Keyword as follows.
JavaScript Operators
These operators are used to describe values, compare values, perform arithmetic operations, and much more. For example, 2+3 Equals 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 piece of code, which is meant to accomplish a certain purpose. This avoids the need to write a code again and over again. It helps the programmer to write module code. Before utilizing any functions, we have to declare 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 the curly bracket.
So these were some JavaScript fundamentals, there are many other things in it, which are extremely tough to describe here. Because this post would be extremely long, that's why we will explain to you below how you may learn them.
what is the usage of javascript?
JavaScript is one of the most used programming languages in the world. Which is used to add automation, animations, and interactivity to web pages. Web developers use JavaScript to make websites complicated. Let us know what you can do using JavaScript.
Web development is an area where JavaScript is utilized the most. Because it is a client scripting language, it is used to generate web pages. Most of the websites utilize it for verification.
JavaScript is also utilized successfully in developing web apps. Initially, several programming languages were employed for the development of technology browsers and personal computers.
But JavaScript accomplished the job of bringing it to the next level. Due to this, such applications were invented which almost anybody would have dreamed about.
Node JS is used to create the webserver. Node JS has numerous advantages, the servers produced by it are highly fast and do not utilize buffering. Apart from this, it is single-threaded with event looping which is used in a non-blocking manner.
JavaScript is also used to develop mobile apps. The most essential thing that the only JavaScript can accomplish is to develop apps without web contexts. With its aid, both Android and iOS applications may be developed.
These are some of the places where JavaScript is utilized more. Apart from this, it is also utilized in developing games and server applications. Although there are many other things that it can perform, this is the main area.
How to learn Javascript
Most people think that JavaScript is quite tough to learn, this is also accurate to some extent. But if you do not rush to learn it, but attempt to comprehend it first.
So you would not have any issue in learning it, certain steps are being given below which will enable you to learn JavaScript.
Essential Tools to Learn JavaScript
Code editor - The first and most significant tool is the code editor in which you may use Notepad++ or Atom. This is a free utility.
Web browser - You all must have a browser on your PC or laptop since with the assistance of this we will be able to visit the web pages generated. Better if you use Chrome, Mozilla, or Firefox. Remember that you must upgrade to the newest version of your browser.
Firebug tool - This is a web browser plugin with the aid of which you can conduct live debugging of HTML, CSS, DOM, XHR, and JavaScript of any web page or website.
If you use Firefox then you just have to install it from google and if you use chrome browser then it is already accessible in it.
To utilize it on Chrome, you have to right-click with the mouse. After which you will notice an option of examine, as soon as you click on it, the entire code of the current page will show in front of you.
Resources for learning JavaScript
To learn this programming language, you should know certain sites from where you can simply start studying JavaScript. You may also utilize numerous paid resources to learn this. But I will tell you about such a free online page and you are provided a comprehensive tutorial on JavaScript on them.
Below are the names of five such websites, from where you may quickly learn JavaScript:
- W3Schools
- tutorial point
- Codeacademy
- JavaScript.info
- freecodecamp
Apart from this, you may also learn JavaScript using YouTube videos. Apart from this, you must also follow these coding learning approaches.
Some Advantages of JavaScript
By now you must have grasped "what is JavaScript" and why it is utilized. So let us now tell you some of its advantages, due to which you should study it.
Let us know what are some of the key advantages of JavaScript.
1) JavaScript is a highly quick programming language, it may be run immediately on the client-side browser. JavaScript is not utilized by network requests to the backend server unless external resources are necessary.
It does not even need to be compiled on the client-side, which is why it achieves better performance. Due to its client-side, the pressure on the server is decreased. Due to which the server loads rapidly.
2) It is utilized worldwide. There are numerous free websites and resources accessible to learn JavaScript, so that you do not have any issue in learning and implementing it.
3) It may be used with Html, CSS, PHP, C++, or any other language. JavaScript may be put into any web page regardless of the file extension.
4) It supports all browsers and delivers the same result in all. JavaScript syntax is fairly straightforward and versatile.
5) Due to its being an event-oriented language, several code segments are run when a specific event happens in JavaScript. To explain in simple terms, a code segment is performed when the user clicks on the button or moves the mouse over the item.
Although it has many more perks, for a coder such many benefits are plenty. So ideally, you must have realized why JavaScript is dubbed the programming language of the future.
Conclusion
So, friends, you know what is JavaScript and how to learn JavaScript? Hopefully, after reading this post, you have completely understood what is the usage of JavaScript and why it is necessary to master it to become a developer?
If you have any issue in understanding any topic on this page, then you can express your query to us in the comment. Your inquiry will be answered immediately.
0 Comments
If you have any doubts, please let me know