ttl-set

const TTLSet = require('ttl-set'); // Create a new TTLSet instance with a 1-minute (60,000 ms) time-to-live const cache = new TTLSet(60 * 1000); console.log('Adding "hello" to cache...'); cache.add('hello'); // Simulate waiting 40 seconds setTimeout(() => { console.log('Adding "world" to cache after 40s...'); cache.add('world'); // "hello" is still alive (40s elapsed < 60s TTL) console.log('Has "hello" (40s)?', cache.has('hello')); // true console.log('Current cache size:', cache.size); // 2 // Simulate waiting another 40 seconds (total 80s) setTimeout(() => { console.log('Checking cache after another 40s (total 80s)...'); // "hello" should have expired (80s > 60s TTL) console.log('Has "hello" (80s)?', cache.has('hello')); // false // "world" should still be alive (40s elapsed for "world" < 60s TTL) console.log('Has "world" (40s for "world")?', cache.has('world')); // true console.log('Current cache size:', cache.size); // 1 // Simulate waiting another 40 seconds (total 120s) setTimeout(() => { console.log('Checking cache after another 40s (total 120s)...'); // "world" should now have expired (80s elapsed for "world" > 60s TTL) console.log('Has "world" (80s for "world")?', cache.has('world')); // false console.log('Current cache size:', cache.size); // 0 }, 40 * 1000); }, 40 * 1000); }, 40 * 1000);