How should I handle errors in callback functions?

How should I handle errors in callback functions?

You can handle errors in callback functions by checking for an error parameter and using try-catch blocks.

Can you give me an example of that?

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);
        return;
    }
    console.log('Data received:', data);
});

What if I want to handle multiple errors?

You can create a centralized error handling function that checks the type of error and responds accordingly.