My Notes

JavaScript Regular Expressions (RegEx)! Regular expressions are powerful tools used for pattern matching and text manipulation. They can be used for validating input, searching for patterns in strings, and performing replacements. What are Regular Expressions? Regular expressions are sequences of characters that form search patterns. They are used to match strings or parts of strings … Read more

JavaScript Modules. Modules are a fundamental feature introduced in ES6 that allow developers to break up their code into separate files, making it easier to manage and reuse. This promotes better organization, maintainability, and modularity of code. What are JavaScript Modules? JavaScript modules are individual files or components that contain reusable code. Each module can … Read more

JavaScript ES6+ Features! ES6 (ECMAScript 2015) introduced several new features that enhance the language’s capabilities, improve readability, and simplify coding. Here’s a breakdown of the key features along with examples and FAQs. 1. Let and Const Before ES6, JavaScript only had the var keyword for variable declaration, which has function scope. ES6 introduced let and … Read more

APIs (Application Programming Interfaces) allow applications to communicate with each other, usually over the web. In JavaScript, you can use fetch() to interact with APIs and retrieve data asynchronously. 1. Fetching Data from an API The fetch() function returns a promise that resolves when the data is successfully fetched from the API. You can then … Read more

Asynchronous JavaScript: Understanding and Practical Uses Asynchronous programming in JavaScript is essential for handling operations that take time to complete, such as fetching data from a server, reading files, or interacting with APIs. By default, JavaScript is single-threaded and synchronous, meaning it executes one statement at a time in sequence. However, this behavior can block … Read more

JavaScript Closures: Understanding and Practical Uses Closures are a powerful and often misunderstood feature of JavaScript. They allow functions to “remember” the scope in which they were created, even after that scope has been closed. This enables a wide variety of use cases, including data privacy, callbacks, and more. 1. What are Closures? A closure … Read more