This Javascript Tutorial is designed to help 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.

What is Javascript?

JavaScript is a high-level, dynamic programming language for web development, server-side scripting, and other computer applications. It is a client-side scripting language that runs in the user’s web browser and can be used to dynamically update web pages, create interactive forms, and provide other features that enhance the user’s experience.

JavaScript was created in 1995 by Brendan Eich while he was working at Netscape Communications Corporation. It is now one of the most popular programming languages in the world and is supported by all major web browsers. JavaScript is often used in conjunction with HTML and CSS to create dynamic and interactive web pages. It can also be used in server-side programming with frameworks such as Node.js.

Versions of Javascript

JavaScript has gone through several versions since it was first introduced in 1995. The major versions of JavaScript are:

• JavaScript 1.0 (released in 1995): The original version of JavaScript, which introduced many of the core features of the language.
• JavaScript 1.1 (released in 1996): Added support for Regular Expressions and other features.
• JavaScript 1.2 (released in 1998): Introduced new features such as support for Unicode characters, new methods for arrays, and new HTML DOM manipulation methods.
• JavaScript 1.3 (released in 1999): Introduced new features such as try/catch exception handling, new methods for arrays and strings, and the ability to nest functions.
• JavaScript 1.4 (never released): An experimental version that introduced new features such as regular expression enhancements, XML support, and support for named function expressions.
• JavaScript 1.5 (released in 2000): Introduced new features such as the Array.prototype.forEach method, the Function.prototype.bind method, and support for E4X (ECMAScript for XML).
• JavaScript 1.6 (released in 2005): Introduced new features such as support for iteration over objects using for..in loops, the Array.prototype.indexOf method, and new XMLHttpRequest objects.
• JavaScript 1.7 (released in 2006): Introduced new features such as generators, iterators, and array comprehensions.
• JavaScript 1.8 (released in 2008): Introduced new features such as native JSON support and new Array.prototype methods, and support for anonymous functions as method definitions.
• ECMAScript 5 (released in 2009): A major update to the language that introduced new features such as strict mode, getters/setters, and support for Object. Create.
• ECMAScript 6 (also known as ECMAScript 2015) (released in 2015): A major update that introduced new features such as classes, arrow functions, template literals, and the let/const keywords for declaring variables.
• ECMAScript 2016, 2017, 2018, 2019, 2020, 2021, and 2022: These versions of ECMAScript introduced new features such as async/await, rest/spread operators, optional chaining, bullish coalescing, private class fields, and many others.

Javascript Tutorial

This section will discuss the tutorial on the Javascript framework for beginners. So let’s begin.

1.  Variables and Data Types:

In JavaScript, variables are used to store data. Variables are declared using the var, let, or const keywords. There are several data types in JavaScript, including numbers, strings, booleans, arrays, and objects.

 

var num = 5;
let name = "John";
const PI = 3.14;
var isTrue = true;
var fruits = ["apple", "banana", "orange"];
var person = { name: "John", age: 30 };

 

2. Functions

Functions are blocks of code that can be called to perform a specific task. In JavaScript, functions are declared using the function keyword.

 

function greet(name) {
console.log("Hello, " + name + "!");
}

greet("John"); // Output: Hello, John!

 

 

3. Conditional Statements

Conditional statements are used to execute certain codes if a certain condition is met. In JavaScript, the if statement is used for conditional statements.

 

var age = 20;

if (age >= 18) {
console.log("You are an adult!");
} else {
console.log("You are not an adult yet!");
}

 

4. Loops

Loops are used to execute a block of code multiple times. In JavaScript, there are two types of loops: the for loop and the while loop.

 

for (var i = 0; i < 5; i++) {
console.log(i);
}

var i = 0;
while (i < 5) {
console.log(i);
i++;
}

 

5. Arrays and Objects

Arrays and objects are used to store multiple values in a single variable. In JavaScript, arrays are declared using square brackets [ ], and objects are declared using curly braces { }.

 

var fruits = ["apple", "banana", "orange"];

var person = {
name: "John",
age: 30,
city: "New York"
};

console.log(fruits[0]); // Output: apple
console.log(person.name); // Output: John

 

6. DOM Manipulation

The Document Object Model (DOM) is a programming interface for web documents. It represents the page so that programs can change the document structure, style, and content. In JavaScript, we can use the DOM to manipulate web page elements.

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Things That Make 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:

1. No Need for Compilers: Since JavaScript is an interpreted language, therefore it does not need any compiler for compilation.
2. 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.
3. 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.
4. Used Everywhere: JavaScript is so loved because it can be used anywhere. It can be used to develop websites, games or mobile apps, etc.
5. Huge Community Support: JavaScript has a huge community of users and mentors who love this language and take its legacy forward.

This tutorial covered the basics of JavaScript programming, including variables, data types, functions, conditional statements, loops, arrays, objects, and DOM manipulation. With these fundamental concepts, you can start building dynamic and interactive web pages using JavaScript.