How do you handle errors in JavaScript? What approaches or tools do you use?

In JavaScript, error handling is usually done using the try...catch construct, which allows catching exceptions and responding to them properly without interrupting the program execution. For example:

try {
  // code that might throw an error
  let result = riskyOperation();
  console.log(result);
} catch (error) {
  console.error('An error occurred:', error.message);
  // you can perform alternative actions or logging
}

For asynchronous code with promises, I use .catch() or async/await with try...catch:

async function fetchData() {
  try {
    const response = await fetch('https://api.example.com/data');
    const data = await response.json();
    return data;
  } catch (error) {
    console.error('Error loading data:', error);
  }
}

I also use global error handlers, such as window.onerror or window.addEventListener('unhandledrejection', ...), to catch unhandled exceptions and promise rejections.

To improve debugging and monitoring, I use tools like Sentry, which collect and analyze errors in production.