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How do I detect and fix memory leaks in JavaScript?

Asked on Aug 23, 2025

Answer

Detecting and fixing memory leaks in JavaScript involves identifying unused memory that is not released. You can use tools like Chrome DevTools to help with this process.

// Example of a memory leak due to a forgotten interval
        const intervalId = setInterval(() => {
            console.log("This runs every second");
        }, 1000);

        // Fix by clearing the interval when it's no longer needed
        clearInterval(intervalId);

Additional Comment:

Use Chrome DevTools' "Memory" tab to take heap snapshots and analyze memory usage.
Common causes of memory leaks include forgotten timers, event listeners, or global variables.
To fix leaks, ensure you clean up intervals, listeners, and references when they are no longer needed.

✅ Answered with JavaScript best practices.

Ask any question about JavaScript here... and get an instant response.

How do I detect and fix memory leaks in JavaScript?

Asked on Aug 23, 2025

Answer

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