Callback Hell in JavaScript

What is Callback Hell ?

• Callback Hell happens when multiple nested callbacks are used in asynchronous code, making it hard to read, understand, and maintain.
• It usually looks like a pyramid or Christmas tree shape because of too many levels of indentation.

Example :

// Nested callbacks (Callback Hell)
setTimeout(() => {
  console.log("Step 1");
  setTimeout(() => {
    console.log("Step 2");
    setTimeout(() => {
      console.log("Step 3");
    }, 1000);
  }, 1000);
}, 1000);