Learn JavaScript Tutorial

"Javascript" is the Programming language of the Web itself and is also the most popular Programming Language ever created. 

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This tutorial will teach you the basic knowledge of JS, and it'll be helpful for both Amateur and Professionals.

In this article, we'll be highlighting: The meaning of Javascript itself, a little history about the development of Javascript, the Advantages and applications of Javascript as a Programming language, as well as examples of Javascript.

What is Javascript?

The Programming language: JS was made to interact with elements on web pages. JS enables the addition of interactivity to a web page. JS is typically used together with both CSS and HTML to enhance the responsiveness of a web page, such as by showing animated charts, form validations, and producing interactive maps.

The JavaScript engine embedded in the web browser runs JS codes whenever a web page gets loaded. i.e., After CSS and HTML have already been downloaded in the browser, the JavaScript code will adjust the CSS and HTML to improve the user interface dynamically.

JS engines are programs that run JS code. JS engines were initially developed as interpreters. However, JS engines are often designed today as just-in-time (JIT) compilers that compile their codes in JS to bytecode to boost performance.

History of Javascript! How Was Javascript Created?

Mosaic was the very first graphical user interface web browser. It was first introduced in 1993 and was essential in the rapid development of the internet as we know it today. Mosaic's key developers created Netscape (now Mozilla) and launched Netscape Navigator, a more beautiful browser, in 1994.

Web sites were only static and unresponsive in the early days of the internet, with no capability for an interactive interface. Because of this factor, the web development community made it a priority to remove this restriction. It then prompted Netscape to include a scripting language in the Navigator browser.

Brendan Eich, a Netscape programmer, created a new scripting language in approximately ten days in September 1995. It was initially named "Mocha," but it swiftly evolved into "LiveScript" and, eventually, "JavaScript."

JS Syntax was influenced by Java, the inheritance by Self, and the first-class functions by "Scheme." JS has, since those times, been accepted by most graphical internet browsers.

Advantages of Javascript

  1. JS helps display personalized and dynamic material based on a user's profile.
  2. JS also sends queries to remote websites and enables the downloading and uploading of files.
  3. React to user actions such as mouse clicks, key presses, and pointer movements
  4. Auto-validated forms and interactive drop-down menus are an example of Javascript's unique and valuable advantage.
  5. Getting and setting website cookies, Asking users questions, displaying messages, and navigating between browser tabs are vital features of JS.
  6. JavaScript code can generate animation and sound.
  7. Allows data to be saved in local storage.

Limitations of in-browser Javascript. What can't it do?

  1. Many web browsers allow JS to function with files, but access is limited but only available if the user does a specific action, such as putting a file into a web browser window or choosing using the input> tag
  2. JavaScript allows users to communicate with the server that serves the current page via the internet. It does not, however, enable you to get data from other sites.
  3. A web page's JavaScript may not allow you to copy, run, or read/write files directly on your hard disk. It does not provide access to any Operating System (OS) functions.

Is Javascript Java?

As a developer, it is essential to know that Java and JS are not the same, even though they can sometimes get confusing. Looking at both concept and design, JS and Java are just different! Java (created by Sun Microsystems) is a strong and flexible programming language categorized with languages like C# and C++.

Example of a Simple Line of Code using Javascript

<script>
document.write("Hello World by TechStack");
</script>
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