JavaScript Notebook

I’m creating an online handbook about JavaScript that will cover all the basic topics. Unlike a physical handbook, this online book will evolve over time as I continue to learn and grow. I’ll keep updating the topics whenever I discover something new.

Please note that these essays and notes are not entirely my original work. I’ve compiled them from various sources, including books, blogs, videos, and even ChatGPT. I’ve credited the original authors at the bottom of each post. My goal is to create a personal reference notebook that I can use to revisit concepts and to make this resource publicly available for others to benefit from as well.

What is JavaScript

• What is JavaScript?
• How JS code is executed?
• Shortest Program in JS

Variables

• Scope, Scope chain and Lexical Environment in JS
• Hoisting in JavaScript
• Class and Function Hoisting in JS
• let and const Keywords Hoisting
• Variable shadowing in JS

Data types

• Primitive Data types in JS
• undefined and not defined in JS

Equality Comparisons

• Referential Equality

Loops and Iterations

Functions

• Pure functions
• Higher Order Functions
• Arrow functions
• Spread and Rest Operators
• Closures

Modules

• Module in JS
• Exports and Imports in JS

Asynchronous JavaScript

• Callbacks
• Callback hells
• Promises

Errors

• Differenet types of errors in JS

APIs

• Browser default actions
• Intersection Observer API

Others

• Redirect your webpage using JavaScript
• Snippet for creating a progress bar