Summary  
This chapter covers JavaScript’s exception handling using try…catch blocks to manage runtime errors and the throw statement to create custom errors.

General domain of usage  
Backend development



Errors can happen during code execution. JavaScript provides a way to handle them so your program does not crash.

The `try...catch` statement is used to catch and handle errors.

```javascript
try {
  const result = JSON.parse("invalid json");
  console.log(result);
} catch (error) {
  console.log("Something went wrong");
}
```

If an error occurs inside `try`, the code inside `catch` runs instead.

You can also create your own errors using `throw`:

```javascript
function checkAge(age) {
  if (age < 18) {
    throw new Error("Access denied");
  }
}

checkAge(16);
```

Error handling is important in backend development because it allows you to control failures and return meaningful responses instead of breaking the application.


Learn the core concepts of JavaScript needed for backend development, including variables, data structures, functions, and asynchronous code. Practice working with real data and understand how JavaScript behaves outside the browser. Build a strong foundation before moving on to Node.js and server-side development.

Error Handling in JavaScript