JavaScript Tutorial

A scripting language is a programming language which is interpreted at runtime instead of being compiled to machine code. A language can be executed in different ways - interpreted or compiled (to bytecode or machine code). Traditionally, when talking about the difference about scripting vs. programming, scripting languages are interpreted and programming languages are compiled. Basically, all scripting languages are programming languages. The theoretical difference between the two is that scripting languages do not require the compilation and are rather interpreted . The spectrum of scripting languages ranges from very small and highly domain-specific languages to general-purpose programming languages used for scripting. The most basic scripting interface developed at W3C is the DOM, the Document Object Model which allows programs and scripts to dynamically access and update the content, structure and style of documents. DOM specifications form the core of DHTML . Scripting can make Web pages more dynamic. For example, without reloading a new version of a page it may allow modifications to the content of that page, or allow content to be added to or sent from that page. Javascript Tutorial Scripting languages are becoming more popular due to the emergence of web-based applications. Although scripts are widely employed in the programming world, they have recently become more associated with the World Wide Web , where they have been used extensively to create dynamic Web pages. While technically there are many client-side scripting languages that can be used on the Web, in practice it means using JavaScript. Applications for JavaScript span from interactive websites to the Internet of Things, making it a great choice for beginners and experienced developers looking to learn a new programming language .
  JavaScript Introduction
  1. How to enable JavaScript in your browser?
  2. Hello, World! Your First JavaScript Programs
  3. Where to place JavaScript in an HTML file?
  4. How To Write Comments in JavaScript

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

  JavaScript: Document Object Model
  1. Javascript DOM Structure
  2. Accessing DOM Elements
  3. How To Traverse the DOM
  4. How to Dom Manipulations
  5. 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
  4. How do I include a JavaScript file in another JavaScript file?
  5. Print the content of a Div using JavaScript/jQuery
  6. How to get the current URL using JavaScript ?
  7. How to Detect a Mobile Device with JavaScript/jQuery
  8. How to validate an email address in JavaScript
  9. JavaScript Array Iteration
  10. How to Remove a Specific Item from an Array in JavaScript
  11. What is JavaScript closures?
  12. How To Remove a Property from a JavaScript Object
  13. How to get selected value from Dropdown list in JavaScript
  14. How do I get the current date in JavaScript?
  15. How to Open URL in New Tab | JavaScript
  16. How to delay/wait/Sleep in code execution | JavaScript
  17. How to round to at most 2 decimal places | JavaScript
  18. How to convert string to boolean | JavaScript
  19. How to check undefined in JavaScript?
  20. How To Copy to Clipboard | JavaScript
  21. How to encode a URL using JavaScript?
  22. How to force Input field to enter numbers only | JavaScript
  23. How to create multiline string in JavaScript
  24. 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?
  4. JavaScript async/await
  5. What does this symbol => mean in Javascript
  6. 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
  4. Uncaught RangeError: Maximum call stack size exceeded
  5. Uncaught TypeError: Cannot set property
  6. SecurityError: Blocked a frame with origin from accessing a cross-origin frame
  7. Unable to get property undefined or null reference
  8. SyntaxError: Cannot use import statement outside a module
  9. What is UnhandledPromiseRejectionWarning

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