JavaScript Courses Online

A scripting language is a type of programming language that undergoes interpretation at runtime rather than being transformed into machine code through compilation. A language can be executed through various means, such as interpretation or compilation into bytecode or machine code. Historically, when distinguishing between scripting and programming, scripting languages have been characterized as interpreted, while programming languages are typically compiled. It is worth noting that all scripting languages are, in fact, programming languages. The fundamental disparity lies in the fact that scripting languages do not necessitate compilation and instead rely on interpretation.

The spectrum of scripting languages encompasses a wide range, varying from petite and specialized languages tailored to specific domains, to versatile general-purpose programming languages employed for scripting purposes. Among the foundational scripting interfaces pioneered by the World Wide Web Consortium (W3C) is the Document Object Model (DOM), which facilitates dynamic access and manipulation of document content, structure, and style by programs and scripts. The DOM specifications form the cornerstone of Dynamic HTML (DHTML). Scripting plays a pivotal role in augmenting the dynamism of web pages. For instance, it enables seamless modifications to page content without necessitating a complete reload, as well as the addition or transmission of content from a given page.

The rising prominence of web-based applications has fueled the increasing popularity of scripting languages. Although scripts have long been utilized in the realm of programming, they have garnered particular significance in the context of the World Wide Web. They have been extensively employed to generate dynamic web pages, thus establishing a strong association with web development. While there exist numerous client-side scripting languages that technically can be utilized on the web, JavaScript has emerged as the de facto standard in practice. JavaScript finds widespread application, ranging from interactive websites to the vast realm of the Internet of Things (IoT), rendering it an excellent choice for both novice programmers and seasoned developers seeking to expand their repertoire. In the subsequent lesson, you will delve deeper into the intricacies of JavaScript and explore its vast potential.


  JavaScript Introduction
  1. How to Enable JavaScript on Google Chrome
  2. Getting Started With JavaScript
  3. Where to place JavaScript in an HTML file?
  1. How To Write Comments in JavaScript

  JavaScript Fundamentals
  1. JavaScript Data Types and Variables
  2. Arrays in JavaScript
  3. JavaScript string
  1. JavaScript If...Else Statements
  2. How to use Loops in Javascript
  3. Global Variables in JavaScript
  4. Working with JavaScript objects
  5. JavaScript Functions
  6. JavaScript Date Formats

  What is DOM? Document Object Model
  1. Javascript DOM Structure
  2. Accessing DOM Elements
  3. How To Traverse the DOM
  1. How to Manipulate the DOM
  2. JavaScript DOM Events

  JavaScript Programming
  1. JavaScript Popup Boxes
  2. Opening a new window in JavaScript
  3. How to Create Drop-Down Lists in JavaScript
  1. How do I include a JavaScript file in another JavaScript file?
  2. Print the content of a Div using JavaScript/jQuery
  3. How to get the current URL using JavaScript ?
  4. How to Detect a Mobile Device with JavaScript/jQuery
  5. How to validate an email address in JavaScript
  6. JavaScript Array Iteration
  7. How to Remove a Specific Item from an Array in JavaScript
  8. What is JavaScript closures?
  9. How To Remove a Property from a JavaScript Object
  10. How to get selected value from Dropdown list in JavaScript
  11. How do I get the current date in JavaScript?
  12. How to Open URL in New Tab | JavaScript
  13. How to delay/wait/Sleep in code execution | JavaScript
  14. How to round to at most 2 decimal places | JavaScript
  15. How to convert string to boolean | JavaScript
  16. How to check undefined in JavaScript?
  17. How To Copy to Clipboard | JavaScript
  18. How to encode a URL using JavaScript?
  19. How to force Input field to enter numbers only | JavaScript
  20. How to create multiline string in JavaScript
  21. How to Check for an Empty String in JavaScript?

  JavaScript Examples
  1. How to convert an Object to an Array in JavaScript
  2. How to copy a JavaScript object ?
  3. How to Convert a String to an Array in JavaScript?
  1. JavaScript async/await
  2. What does this symbol => mean in Javascript
  3. JavaScript Sleep() function

  JavaScript Errors
  1. Uncaught TypeError: 'undefined' is not a function
  2. XMLHttpRequest cannot load no 'access-control-allow-origin'
  3. TypeError: null is not an object
  1. Uncaught RangeError: Maximum call stack size exceeded
  2. Uncaught TypeError: Cannot set property
  3. SecurityError: Blocked a frame with origin from accessing a cross-origin frame
  4. Unable to get property undefined or null reference
  5. SyntaxError: Cannot use import statement outside a module
  6. What is UnhandledPromiseRejectionWarning

  JavaScript Interview Questions (2023)
  1. JavaScript Interview Questions (Part2)
  2. JavaScript Interview Questions (Part3)
  3. Is JavaScript a true OOP language?
  1. Advantages and Disadvantages of JavaScript
  2. Difference Between JavaScript and ECMAScript?
  3. What is noscript tag?
  4. Escaping Special Characters in JavaScript
  5. What is undefined x 1 in JavaScript?
  6. Logical operators in JavaScript
  7. Difference between '=', '==' and '===' operators in JS
  8. How to loop through objects in JavaScript?
  9. How to write html code dynamically using JavaScript?
  10. How to add html elements dynamically with JavaScript?
  11. How to load another html page from javascript?
  12. What Is The Disadvantages Using InnerHTML In JavaScript?
  13. What is Browser Object Model
  14. How to detect the OS on the client machine in JavaScript?
  15. Difference between window, document, and screen in Javascript?
  16. Difference between the substr() and substring() in JavaScript?
  17. How to replace all occurrences of a string in JavaScript?
  18. Test a string as a literal and as an object in JavaScript
  19. What is Associative Array in JavaScript
  20. What is an anonymous function in JavaScript?
  21. What is the use of 'bind' method in JavaScript?
  22. Pure functions Vs. Impure functions in javascript
  23. Is Javascript a Functional Programming Language?
  24. What's the Difference Between Class and Prototypal Inheritance?
  25. Javascript, Pass by Value or Pass by Reference?
  26. How to prevent modification of an object in Javascript?
  27. What is 'this' keyword in JavaScript?
  28. How Does Function Hoisting Work in JavaScript?
  29. What do mean by NULL in Javascript?
  30. What does the delete operator do in JavaScript?
  31. What is the Infinity property used for in Javascript?
  32. Event bubbling and Event Capturing in JavScript?
  33. What is "strict mode" and how is it used in JavaScript?
  34. What is the difference between call and apply in JavaScript
  35. Entire content of a JavaScript source file in a function block?
  36. What is an immediately-invoked function expression?
  37. What is escape & unescape String functions in JavaScript?
  38. Instanceof operator in JavaScript
  39. What Are RESTful (REpresentational State Transfer)Web Services?
  40. What is Unobtrusive JavaScript & Why it's Important?
  41. What Does JavaScript Void(0) Mean?
  42. What are JavaScript Cookies?
  43. Difference between Client side JavaScript and Server side JavaScript
  44. TypeError: document.getelementbyid(...) is null
  45. Uncaught TypeError: Cannot read property of undefined In JavaScript
  46. Null and Undefined in JavaScript