How can I handle errors in callbacks effectively?

How can I handle errors in callbacks effectively?

You can handle errors in callbacks by using try-catch blocks or by passing an error object as the first argument in the callback.

Can you give me an example of using a callback with error handling?

Sure! Here's a simple example:

function fetchData(callback) {
    // Simulating an API call
    setTimeout(() => {
        const error = null; // or an error object
        const data = { message: 'Success!' };
        callback(error, data);
    }, 1000);
}

fetchData((error, data) => {
    if (error) {
        console.error('Error fetching data:', error);
    } else {
        console.log('Data received:', data);
    }
});

What if I want to handle multiple errors?

You can handle multiple errors by checking the error type or code within your callback and responding accordingly. You can also use a centralized error handling function.