JavaScript (JS) is the most popular lightweight, interpreted compiled programming language. It can be used for both Client-side as well as Server-side developments. It is also known as a scripting language for web pages. This free JavaScript Tutorial is designed to help both beginners and experienced professionals master the fundamentals of JavaScript and unleash their creativity to build powerful web applications. From basic syntax and data types to advanced topics such as object-oriented programming and DOM manipulation.

JavaScript Basics

• Introduction to JavaScript
• History of JavaScript
• JavaScript Code Execution
• Console in JavaScript
• JavaScript Versions
• JavaScript Syntax
• JavaScript Comments
• Where to Put JavaScript in HTML
• JavaScript First Program Hello world
• Data types
• Variables
  • let Keyword
  • var Keyword
  • const Keyword

JavaScript Control Flow Statements

• return Statement
• break Statement
• continue Statement
• throw Statement
• if…else Statement
• switch Statement
• try…catch Statement

JavaScript Loops

• for Loop
• do…while Loop
• while Loop
• for…in Loop
• for…of Loop
• labeled Statement
• break Statement
• continue Statement

JavaScript Expression and Operators

• Assignment operators
• Comparison operators
• Arithmetic operators
• Bitwise operators
• Logical operators
• BigInt Operators
• String operators
• Ternary operator
• Comma operator
• Unary operators
• Relational operators

JavaScript Objects

• Array
• String
• Date
• Number
• Math
• Object
• Boolean
• JSON
• Map
• Set
• Atomics
• BigInt
• Promise
• Proxy
• Reflect
• WeakMap
• WeakSet

JavaScript Functions

• Functions in JavaScript
• Function Definitions
• Function Call
• Function Expression
• Pure Functions
• Function Parameters
• Function Invocation
• Anonymous Functions
• Arrow functions
• Nested functions
• Function Generator
• Function binding
• Async/Await Function
• Hoisting

JavaScript Regular Expression

• Regular expressions
• RegExp [abc] Expression
• RegExp S Metacharacter
• RegExp m Modifier
• RegExp ?! Quantifier
• RegExp {X,Y} Quantifier
• RegExp test() Method
• RegExp [^0-9] Expression

JavaScript Events

• Events
• onclick Event
• dblclick Event
• onload Event
• onresize Event
• onblur Event
• onchange Event
• Focus Event 
• Clipboard Event
• onscroll Event

JavaScript OOPs

• Classes In JavaScript
• JavaScript class expression
• Object Constructors
• Static Methods
• JavaScript Prototype
• JavaScript Constructor Method
• JavaScript Encapsulation
• Inheritance
• Polymorphism
• Abstraction

Inheritance and Prototype Chain

• Explain Prototype Inheritance in JavaScript 
• Understanding the Prototype Chain in JavaScript
• Object Constructors
• Prototype in JavaScript

Memory Management

• Memory Management in JavaScript
• Garbage Collection

JavaScript Promises

• Promise
• Promise Chaining
• JavaScript Errors Throw and Try to Catch 
• Class compositions in JavaScript

JavaScript Iterators and generators

• Iterator
• Function Generator 

JavaScript Validations

• Form Validation
• Email Validation

Exception Handling

• Exception Handling
• try-catch Statement
• Promises
• async/await

JavaScript Miscellaneous

• this Keyword
• Strict Mode
• setTimeOut() and setInterval() Method
• typeOf Operator
• Debugging
• Local Storage
• Callback
• Closures
• defer
• scope
• Void

JavaScript Objects Reference

This section contains the list of all properties and methods of all JavaScript objects.

• Array
• ArrayBuffer
• Atomics
• BigInt
• Boolean and dataView
• Date
• Error
• Function
• Generator
• Intl
• JSON
• Map
• Math
• Number
• Object
• Promise
• Proxy
• Reflect
• RegExp
• String
• Symbol
• WeakMap
• WeakSet
• Expressions

Reason to Learn JavaScript

JavaScript is used by many developers (65% of the total development community), and the number is increasing day by day. JavaScript is one such programming language that has more than 1444231 libraries and increasing rapidly. It is preferred over any other programming language by most developers. Also, major tech companies like Microsoft, Uber, Google, Netflix, and Meta use JavaScript in their projects. To learn more reasons, please refer Reasons to Learn JavaScript article.

How JavaScript Makes HTML Build Website Better?

• JavaScript is an advanced programming language that makes web pages more interactive and dynamic whereas HTML is a standard markup language that provides the primary structure of a website.
• It simply adds dynamic content to websites to make them look good and HTML work on the look of the website without the interactive effects and all.
• It manipulates the content to create dynamic web pages whereas HTML pages are static which means the content cannot be changed.
• It is not cross-browser compatible whereas HTML is cross-browser compatible.
• It can be embedded inside HTML but HTML can not be embedded inside JavaScript.

Things that Makes JavaScript Demanding

JavaScript is the most popular and hence the most loved language around the globe. Apart from this, there are abundant reasons to become the most demanding. Below are a listing of a few important points:

• No need for compilers: Since JavaScript is an interpreted language, therefore it does not need any compiler for compilation.
• Used both Client and Server Side: Earlier JavaScript was used to build client-side applications only, but with the evolution of its frameworks namely Node.js and Express.js, it is now widely used for building server-side applications too.
• Helps to build a complete solution: As we saw, JavaScript is widely used in both client and server-side applications, therefore it helps us to build an end-to-end solution to a given problem.
• Used everywhere: JavaScript is so loved because it can be used anywhere. It can be used to develop websites, games or mobile apps, etc.
• Huge community support: JavaScript has a huge community of users and mentors who love this language and take it’s legacy forward.

JavaScript Interview Preparation

• JavaScript Interview Questions and Answers | Set 1
• JavaScript Interview Questions and Answers | Set-2
• JavaScript Interview Questions and Answers | Set 3

JavaScript Practice Quiz

• JavaScript Course | Practice Quiz-1
• JavaScript Course | Practice Quiz-2
• JavaScript Course | Practice Quiz-3

JavaScript Libraries & Frameworks

Libraries

• ReactJS
• jQuery
• p5.js
• D3.js
• Collect.js
• Underscore.js
• Lodash
• Tensorflow.js

Technology

• ES6
• TypeScript

Frameworks

• AngularJS
• Vue.js
• NuxtJS

Please go through our Free JavaScript Course to learn complete JavaScript and JavaScript Examples and JavaScript Programs link to see the wide collection of JavaScript programming examples. The examples are categorized based on the topics, including objects, functions, arrays, DOM, and many more.

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