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In JavaScript (and in general OOP), 👉 Objects are collections of data (properties) and behavior (methods). 1. Object Properties ✅...

In JavaScript, an object is a collection of key-value pairs (properties), where keys are strings (or Symbols) and values can...

1. Function Scope 2. Block Scope ✅ Key Differences Feature Function Scope Block Scope Keyword var let, const Visibility Accessible...

In JavaScript, a private variable is a variable that is not accessible directly from outside the object/class where it is...

these three (call, apply, and bind) are JavaScript function methods that let you explicitly set the value of this when...

1. Rest Parameters (...) ✅ Example: 🔹 Here, numbers becomes an array of all passed arguments. Key Points: 2. Default...

In JavaScript, the arguments object is an array-like object that is automatically available inside every non-arrow function. It contains all...

1. Function Declaration ✅ Example: 2. Function Expression ✅ Example: 3. Key Differences Feature Function Declaration Function Expression Hoisting Fully...

An IIFE (Immediately Invoked Function Expression) is a JavaScript function that is defined and executed immediately after its creation. It...

A callback function is a function that is passed as an argument to another function, and then executed later (called...