Understanding Callback Functions, Arrow Functions, and useEffect in React

Sure! Here's a blog post that explains callback functions, arrow functions, and how they relate to useEffect in React. You can use or modify this for your own learning or website. Understanding Callback Functions, Arrow Functions, and useEffect in React When working with React, you'll often come across callback functions, arrow functions, and the powerful React hook called useEffect. These concepts are key to writing clean, efficient, and bug-free React applications. Let’s break each of them down and then see how they all work together. ✅ What is a Callback Function? A callback function is simply a function passed as an argument to another function, and then executed later. Example: function greet(name, callback) { console.log("Hi " + name); callback(); } function sayBye() { console.log("Bye!"); } greet("John", sayBye); Output: Hi John Bye!

Jun 26, 2025 - 16:10

Sure! Here's a blog post that explains callback functions, arrow functions, and how they relate to useEffect in React. You can use or modify this for your own learning or website.

Understanding Callback Functions, Arrow Functions, and `useEffect` in React

When working with React, you'll often come across callback functions, arrow functions, and the powerful React hook called useEffect. These concepts are key to writing clean, efficient, and bug-free React applications.

Let’s break each of them down and then see how they all work together.

✅ What is a Callback Function?

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

Example:

function greet(name, callback) {
  console.log("Hi " + name);
  callback();
}

function sayBye() {
  console.log("Bye!");
}

greet("John", sayBye);

Output:

Hi John
Bye!