JavaScript Tutorial
Our JavaScript tutorial is tailored for both beginners and professionals, providing the skills needed to create dynamic client-side web pages.
JavaScript is a lightweight, cross-platform scripting language that is object-based.
JavaScript is not a compiled language but a translated one. The JavaScript interpreter, embedded in the browser, is responsible for translating the JavaScript code for execution in the web browser.
What is JavaScript
JavaScript (JS) is a lightweight, object-oriented programming language widely used for scripting web pages. As an interpreted, fully-featured programming language, it enables dynamic interactivity on websites when integrated with HTML.
JavaScript has no connection to the Java programming language, despite the similarity in names. The name was chosen during a time when Java was gaining popularity in the market. Beyond web browsers, databases like CouchDB and MongoDB also use JavaScript as their scripting and query language.
Features of JavaScript :
1. All major web browsers support JavaScript by providing built-in execution environments.
2. JavaScript adopts the syntax and structure of the C programming language, making it a structured programming language.
3. JavaScript is a weakly typed language, meaning certain types are implicitly converted based on the operation being performed.
4. JavaScript is an object-oriented programming language that relies on prototypes for inheritance instead of using classes.
5. It is a language that distinguishes between uppercase and lowercase characters.
6. It is a lightweight and interpreted language.
7. JavaScript is supported on various operating systems, including Windows and macOS.
8. It gives users substantial control over their web browsers.
History of JavaScript
In 1993, the Mosaic browser debuted. By 1994, Marc Andreessen founded Netscape, aiming to enhance web dynamism. In 1995, Netscape hired Brendan Eich to add a scripting language to the browser, initially planning to use Scheme. However, after merging with Sun Microsystems to integrate Java, the company created a new scripting language. The language was first named 'Mocha,' then 'LiveScript,' and finally 'JavaScript' in December 1995, marking its official launch.
Application of JavaScript:
JavaScript is used to create interactive websites and is primarily employed for:
- Cient-side form validation,
- interactive dropdown lists,
- showing current date and time,
- Displaying pop-up windows and dialog boxes, such as alert, confirm, and prompt dialogs,
- Showing time displays.
Example
<Script>
document.write("Welcome to my website!");
</Script>
