In Part 1, we built a Stopwatch using Vanilla JavaScript.
In this video (Part 2), we go deeper into real-world development problems:
debugging bugs and optimizing unnecessary UI rendering.
This is not just about fixing code โ itโs about understanding why the bug exists.
๐ What We Fix
We debug a common issue:
โ Clicking Start + Start does NOT pause the stopwatch โ why?
Using Browser DevTools, we:
Inspect event listeners
Analyze function calls
Track state changes
Understand how multiple intervals get created
Identify unnecessary UI re-renders
Then we implement a clean, logical solution.
๐ What Youโll Learn
How to debug JavaScript using DevTools
Why duplicate event triggers happen
Preventing multiple setInterval calls
Optimizing UI rendering
Writing safer state-driven logic
Thinking like a real frontend engineer
This video focuses on debugging mindset, not copy-paste fixes.
#JavaScript
#Debugging
#JavaScriptProjects
#FrontendDevelopment
#WebDevelopment
#DevTools
#VanillaJavaScript
#ProblemSolving
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