Logo
×

Javascript Tutorial

JavaScript is a light-weight, dynamic scripting language that is mainly employed to create interactive front-end web applications. It was originally developed in 1995 by Brendan Eich at Netscape Communications Corporation and has now become one of the most popular programming languages in the world today.

This language supports the incorporation of numerous different features and functionalities, such as data visualization, user authentication, form validation, interactive maps, dynamic menus and forms, animations, and more. Its sole purpose is to improve the interaction of users and enable the development of sophisticated and feature-heavy web applications.

Along with other web technologies like HTML and CSS, JavaScript is an essential tool for building responsive and contemporary web applications. HTML gives a web page its structural outline. CSS, however, gives it its presentational look, enabling developers to build aesthetically pleasing and user-friendly web pages that are easy to use.

Why is it important to learn JavaScript?

JavaScript is a unique scripting language, not to be confused with Java. It is largely used for front-end programming. It is used in conjunction with HTML and CSS and is supported by most web browsers. JavaScript can be used for game development, application development, and desktop application development. It also has many frameworks like React, jQuery, and Angular.

  1. It allows data to be stored in local storage to be utilized afterwards.
  2. It allows for requesting the server.
  3. It can display user content dynamically depending on business logic or particular requirements.
  4. It is also employed for the creation of animation effects, including movement and sound. Lastly,
  5. JavaScript provides a variety of events caused by user input, including key presses, mouse clicks, and pointer movement. JavaScript provides a variety of events caused by user input, including key presses, mouse clicks, and pointer movement.

Interrelation between JavaScript, CSS, and HTML

JavaScript: JavaScript is utilized for scripting the web page's interactive behavior and defining what to present the users with.

CSS: This is used to specify the look and structure of web pages, such as how they appear visually to users.

HTML: A markup language used for defining the structure of the web page, and displaying the data according to business logic.

JavaScript Tutorial

Applications of JavaScript

User Notifications: JavaScript is used to offer notifications to users, and it allows dynamic notifications on web pages.

Server Applications: Since JavaScript is an event-driven library, it plays a critical role in developing scalable and efficient applications.

HTML Manipulation: Using JavaScript, HTML pages can be manipulated such that HTML tags can be inserted or removed as one prefers, and thus applications become more appealing to the eyes.

Client-side Validation: JavaScript provides client-side data validation that validates user input before submitting it to the server. It is achieved using several JavaScript libraries.

Back-end Data Loading: JavaScript uses AJAX calls to load data from the back-end. It allows loading data while other tasks are being executed or while processing other data.

Features of JavaScript

Object-Oriented: This ability allows the reusability of code using the objects, instantiating, and using them in runtime.

Dynamic: The type of JavaScript variable can be altered at runtime thus supporting the easiness of building and modification without close supervision fault-prone otherwise.

Interpreted: Compilation is not necessarily required before its execution. That speeds up both the development and test phases.

Functional Programming: JavaScript is fully compatible with functional programming patterns, making it easier for developers to construct brief and modular code that's easier to test and maintain.

APIs: Allows developers to access various APIs, such as the Document Object Model (DOM) and the Web Audio API so that developers can create complex web applications with advanced multimedia and interactive capabilities.

DOM Manipulation: Another very important feature of JavaScript is that it can be used to manipulate the DOM of a web page so that developers can dynamically change content and structure based on user behavior or other events.

Benefits of JavaScript

  1. Being an interpreted programming language, it does not need compilation thus not requiring the usage of any compiler. This directly gets interpreted as HTML inside the browser
  2. There have been times when JavaScript proved to be easy for anyone and anybody to learn. Most of them have been made with the applications that are developed on dynamic sites along with their applications.
  3. Because JavaScript executes on the client side, it reduces the workload of the web server.
  4. The language provides the services of branching, loops, and conditional statements that apply to web pages.

Conclusion

JavaScript is a high-level programming language that is widely applied for developing interactive web pages and applications. The usage is extensive because it is very versatile and applicable to many different types of applications, namely:

  1. Web development
  2. Mobile application development
  3. Desktop application development
  4. Game development
  5. Programming for the Internet of Things (IoT)

JavaScirpt Tutorial Index

Misc

Interview Questions

Related Topics

Javascript Find Object In Array

What is find() method? It returns the value of the first element in the given array that fulfils the given testing function. However, if no values from the array are able...

3 minutes read.

Javascript Event

Events are things that happen, usually user action, that are associated with an object. All object have properties and methods. Some objects also have events. The event handler is a command that is...

1 minute read.

Javascript Re-Password Validation

Example <!DOCTYPE html>   <html>   <head>   <script>   function pass_validation()   {   var firstpassword=document.f1.password1.value;     var secondpassword=document.f1.password2.value;     if(firstpassword==secondpassword){     return true;     }     else{   alert("Password does Not Match");     return false;     }     }    </script>   </head>   <body>   <form name="f1" action="/JavaScript/Index" onsubmit="return pass_validation()">   Password:<input type="password" name="password1" /><br/>   Re-enter :<input type="password" name="password2"/><br/>   <input type="submit">   </form>   </body>   </html> Try Now ← Prev Next → ...

1 minute read.

JavaScript setInterval()

On the Window and Worker interfaces, the setInterval() method calls a function or executes a snippet with a specified time delay between each call. This function provides an interval ID that...

4 minutes read.

Javascript Email Validation

We can validate the email with the help of JavaScript. Here we check the condition related to any email id, like email it must have "@" and "." sign and...

2 minutes read.

Javascript Print

JavaScript help's the functionality using the print function of window object. In JavaScript print function window.print() print the current web page when it executed. We can call function directly using onclick...

1 minute read.

Javascript If Else

Introduction The if-else statement is an important control structure for decision-making in code based on some conditions. It gives programmers the ability to add decision-making functionality into their programs. Using if-else,...

6 minutes read.

Array to String in JavaScript

As a web developer, you often have to deal with multiple data types in a single application. How to convert an array to a string in JavaScript is essential for...

19 minutes read.

Javascript Tutorial

JavaScript is a light-weight, dynamic scripting language that is mainly employed to create interactive front-end web applications. It was originally developed in 1995 by Brendan Eich at Netscape Communications Corporation...

5 minutes read.

Javascript Example

What is JavaScript? JavaScript is a highly versatile programming language. It provides the capability to add interactivity to static web pages, which are designed with HTML and CSS. It also provides...

5 minutes read.

D3.js Tutorial

Introduction of D3.js D3.js is referred to as a JavaScript library that is used to manipulate the documents according to the data. The intensity of D3 is based on web standards...

5 minutes read.

JavaScript radio button checked value

What are radio buttons? A radio button is defined as an icon that is used to take input from the user. The user can choose only one option(value) from the group...

5 minutes read.

Javascript comment

Introduction In programming languages, comments are a method to include meaningful annotations within the code that the compiler or interpreter will ignore at run time. That is to say, though comments...

7 minutes read.

JavaScript setTimeout()

The setTimeout() method creates a timer that, when it expires, runs a function or provides a piece of code. setTimeout() is an asynchronous function, which means that it will not interrupt...

3 minutes read.

JavaScript Function

An important part of JavaScript is the ability to create new functions within <script>.....</script> tag. To declare a function in JavaScript using function keyword. We call JavaScript function multiple times to reuse the...

3 minutes read.

Javascript Document Object

Document object represents the whole HTML documents. When HTML document is loaded in browser it becomes the document object. It is the root elements that represent the HTML documents. With the help of...

2 minutes read.

Javascript Page Redirect

The window.location object can be used to get the current page address (URL) and to redirect browser to new page. In some websites when we visit, we face a situation where we...

3 minutes read.

JavaScript moment date difference

Often date differences are required on the web platforms for various reasons. They can be: To find the duration, of course, someone is pursuingTo find the age of a user from...

7 minutes read.

Javascript Dialog Box

A JavaScript dialog box is predefined function which is used to perform different task. Some functions are used in JavaScript Dialog box. FunctionDescriptionalert()To give alert message to userprompt()To input value from...

2 minutes read.

JavaScript redirect URL with parameters

Data can be often passed between web pages as information in URL parameters or query strings. A URL (Uniform Resource Locator) can have a single parameter or multiple parameters.Parameters can...

4 minutes read.