JavaScript Tutorial for Beginners

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A yellow background with the JavaScript logo and text on the left. On the right, there is a black laptop displaying JavaScript code: "if (age > 19){ alert('Adult'); } else { alert('Teenager'); }" in the coding environment.

Our JavaScript Tutorial is created for beginners and professionals. JavaScript is utilized to create client-side dynamic pages.

JavaScript is an object-based scripting language which is light and cross-platform.

JavaScript is not a collected language, but it is a translated language. The JavaScript Translator (implanted in the browser) is liable for translating the JavaScript code for the web browser.

What is JavaScript

JavaScript (js) is a lightweight object-oriented programming language that is utilized by several websites for scripting webpages. It is an interpreted, full-fledged programming language that allows dynamic interactivity on websites when used to an HTML document. It was presented in the year 1995 for adding programs to the webpages in the Netscape Navigator browser. Since then, it has been embraced by all other graphical web browsers. With JavaScript, users can create modern web applications to interact instantly without reloading the page every time. The traditional website utilizes js to provide several forms of interactivity and simplicity.

Although, JavaScript has no connectivity with Java programming language. The name was presented and delivered in the times when Java was gaining favor in the market. In addition to web browsers, databases such as CouchDB and MongoDB uses JavaScript as their scripting and question language.

Features of JavaScript

There are the following features of JavaScript:

  1. JavaScript is a weakly typed language, where specific types are implicitly cast (relying on the operation).
  2. JavaScript is an object-oriented programming language that utilizes prototypes rather than utilizing classes for inheritance.
  3. All famous web browsers support JavaScript as they provide built-in execution environments.
  4. JavaScript tracks the syntax and structure of the C programming language. Thus, it is a structured programming language.
  5. It is a light-weighted and interpreted language.
  6. It is a case-sensitive language.
  7. JavaScript is verifiable in several operating systems including, macOS, Windows, etc.
  8. It delivers good control to the users over the web browsers.

History of JavaScript

In 1993, Mosaic, the first famous web browser, came into existence. In the year 1994, Netscape was established by Marc Andreessen. He learned that the web needed to become more dynamic. Thus, a ‘glue language’ was believed to be delivered to HTML to make web designing easy for designers and part-time programmers. Accordingly, in 1995, the company drafted Brendan Eich intending to implement and embed Scheme programming language into the browser. But, before Brendan could begin, the company merged with Sun Microsystems to add Java into its Navigator so that it could compete with Microsoft over the web technologies and platforms. Now, two languages were there: Java and the scripting language. Further, Netscape decided to give a comparable name to the scripting language as Java’s. It directed to ‘Javascript’. Finally, in May 1995, Marc Andreessen coined the first code of Javascript named ‘Mocha’. Later, the marketing team substituted the name with ‘LiveScript’. But, due to trademark reasons and specific other reasons, in December 1995, the language was finally renamed to ‘JavaScript’. From then, JavaScript came into existence.

Application of JavaScript

JavaScript is utilized to build interactive websites. It is mainly used for:

  • Client-side validation,
  • Dynamic drop-down menus,
  • Showing date and time,
  • Showing pop-up windows and dialog boxes (like an alert dialog box, confirm dialog box, and prompt dialog box),
  • Showing clocks etc.

JavaScript Example

  1. <script>  
  2. document.write(“Hello JavaScript by JavaScript”);  
  3. </script>  
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