Fix JavaScript Promise Rejection (Unhandled) Error (2025 Guide)
Fix Promise Rejection (Unhandled) Error in JavaScript - 2025 Guide Fix Promise Rejection (Unhandled) Error in JavaScript - 2025 Guide Posted on: March 12, 2025 If you’ve seen an "Unhandled Promise Rejection" warning in your JavaScript console, it means a Promise was rejected but not properly handled. This can lead to silent bugs—let’s fix it in this 2025 guide. What Causes "Promise Rejection (Unhandled)"? This error occurs when a Promise is rejected, but there’s no .catch() to handle the rejection. Common causes include: Missing .catch() : Forgetting to handle rejections in a Promise chain. Async/Await without Try-Catch : Not handling errors in async functions. Event Listeners : Unhandled rejections in event-driven code. Here’s an interactive example (ope...