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.

According to the TypeScript definitions [index.d.ts:L2-L4], activeCount is a read-only property that returns "The number of promises that are currently running."

Here's how you'd use it:

import pLimit from 'p-limit';

const limit = pLimit(5);

// ... queue some tasks ...

console.log(limit.activeCount); // Returns the number of currently running promises

A practical example from the recipes is progress reporting [recipes.md:L191-L214], which shows checking activeCount alongside pendingCount at intervals:

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

This allows you to monitor how many tasks are currently executing versus waiting in the queue.

FOLLOW_UPS:

• How do I check the number of pending tasks?
• What's the difference between activeCount and pendingCount?
• Can I set a callback when activeCount changes?