How can I check the current number of active tasks?

You can check the current number of active tasks using the activeCount property on the limit function.

[index.d.ts:L2-L4] defines activeCount as:

The number of promises that are currently running.

Here's how to use it:

import pLimit from 'p-limit';

const limit = pLimit(5);

// After you've called limit() with some functions...
console.log(limit.activeCount); // Shows how many promises are currently executing

This is useful for monitoring progress. For example, [recipes.md:L191-L214] shows a practical pattern where you can report progress using both activeCount and pendingCount:

const progressInterval = setInterval(() => {
	console.log(`Running: ${limit.activeCount}, pending: ${limit.pendingCount}`);
}, 250);

activeCount is read-only and reflects the real-time number of promises that have started execution but haven't completed yet.

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FOLLOW_UPS:

• What's the difference between activeCount and pendingCount?
• How do I monitor progress during concurrent operations?
• Can I dynamically change the concurrency limit?