IT Services Circle

Oct 10, 2026 · Fundamentals

Why .catch() Fails to Catch Sync Errors: Promise.try() & async Solutions

The article explains why .catch() doesn't catch synchronous exceptions thrown before a Promise is returned, illustrates common scenarios like validation and JSON.parse, shows debugging clues (Uncaught Error vs unhandledRejection), and presents solutions: Promise.try(), async functions, and try/catch with await, including browser/Node support and a polyfill for older runtimes.