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Chapter XXIII · Error Handling

Error Handling

Error handling is the systematic process of anticipating, intercepting, and managing runtime exceptions gracefully without crashing applications.

01 How It Works

Think of an airplane emergency landing backup system designed to stabilize flight during turbulence.

Using `try...catch` blocks, runtime errors are captured and routed into fallback recovery paths.

example.js
try {
  JSON.parse("invalid json");
} catch (error) {
  console.log("Handled parsing error safely");
}

  1. 1. Wrap risky code inside a `try` block.

  2. 2. Catch thrown exceptions inside a `catch` block.

  3. 3. Execute cleanup tasks inside a `finally` block.

02 Practical Example

Here is how you might see this concept applied in real-world code:

practical.js
try {
  throw new Error("Custom system failure");
} catch (err) {
  console.error(err.message);
}

Key Takeaway

Proper error handling prevents application crashes and improves user experience.

Related Concepts