Web Reference: Feb 12, 2026 · In this lesson, we will return to the subject of debugging JavaScript (which we first looked at in What went wrong?). Here we will delve deeper into techniques for tracking down errors and explain how to code defensively and handle errors in your code, avoiding problems in the first place. Debugging is the process of testing, finding, and reducing bugs (errors) in computer programs. The first known computer bug was a real bug (an insect) stuck in the electronics. Jul 11, 2025 · Debugging is the process of testing, finding, and reducing bugs (errors) in computer programs. It involves: Identifying errors (syntax, runtime, or logical errors). Using debugging tools to analyze code execution. Implementing fixes and verifying correctness. Syntax Errors: Issues with incorrect syntax, preventing execution.
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