Error Handling & Debugging Guide | Exception Handling & Debugging

Promise.allSettled() is a method that allows you to wait for all promises in an array to settle, regardless of whether they resolve or reject. This is useful when you need to know the outcome of each promise without being interrupted by errors.

To prevent unhandled promise rejection warnings, always handle potential errors within your promises using try-catch blocks or `.catch()` methods. This ensures that any rejected promises are caught and dealt with appropriately.

Defensive programming is a software design technique where you anticipate potential errors and handle them proactively, rather than reacting to them after they occur. It involves validating inputs, checking for null/undefined values, and implementing error handling mechanisms.

Defensive programming anticipates and handles errors proactively. Validate inputs, check for null/undefined, handle exceptions gracefully, and write tests to prevent regression – these are all key components of a robust defensive approach.