Error-First Callbacks
NodeJS follows the convention of “error-first callbacks,” where callback functions receive an error object as the first argument. Developers can check for the presence of an error in the callback function and handle it accordingly.
fs.readFile('non-existent-file.txt', (error, data) => {
if (error) {
console.error('An error occurred:', error.message);
return;
}
console.log('File content:', data);
});
How to handle errors in Node JS ?
Error handling is a critical aspect of NodeJS development to ensure the robustness and reliability of applications. NodeJS provides various mechanisms for handling errors, including try/catch blocks, error events, and error-first callbacks. Understanding how to handle errors effectively is essential for building resilient and fault-tolerant NodeJS applications.