Like a JavaScript Set, but with a TTL on entries

npm install ttl-set --save

const TTLSet = require('ttl-set')

const cache = new TTLSet(60 * 1000) // TTL: 1 minute

cache.add('hello')
// ...wait 40 seconds...
cache.add('world')
// ...wait 40 seconds...
console.log(cache.has('hello')) // => false
console.log(cache.has('world')) // => true
// ...wait 40 seconds...
console.log(cache.has('world')) // => false

Create a new instance of the TTLSet. Takes ttl as a required argument, which is the number of milliseconds for elements to live in the TTLSet before evicting them.

Adds the given value to the TTLSet.

Clear all previously added values to the TTLSet.

Returns true if the TTLSet contains the given value. Returns false otherwise.

The number of elements in the TTLSet.

MIT