What are common promise errors in JavaScript and how can I handle them?

What are common promise errors in JavaScript and how can I handle them?

Common promise errors include 'TypeError', 'UnhandledPromiseRejectionWarning', and 'Promise.all()' failures. You can handle them using try-catch blocks, .catch() methods, and proper error handling in async functions.

Can you explain how to use try-catch with promises?

Sure! You can wrap your async code in a try block and catch any errors in the catch block. For example:

async function fetchData() {
  try {
    const response = await fetch('url');
    const data = await response.json();
    return data;
  } catch (error) {
    console.error('Error fetching data:', error);
  }
}

What does 'UnhandledPromiseRejectionWarning' mean?

'UnhandledPromiseRejectionWarning' occurs when a promise is rejected but there is no .catch() handler to handle the rejection. It's important to always handle promise rejections to avoid this warning.

How can I prevent promise errors in my code?

To prevent promise errors, always use .catch() for handling rejections, validate inputs before making promises, and use async/await with try-catch for better error management.