memoize async functions such that concurrent calls return the same promise
npm i --save memoize-concurrent// esm
import memo from 'memoize-concurrent'
// commonjs
const memo = require('memoize-concurrent').defaultExample showing that concurrent calls return the same promise and asyncronous calls invoke the passed function
import memo from 'memoize-concurrent'
const memoizedFetch = memo(fetch)
const promise1 = memoizedFetch('http://localhost') // hits server
const promise2 = memoizedFetch('http://localhost') // hits cache
console.log(promise1 === promise2) // true
await promise1
const promise3 = memoizedFetch('http://localhost') // hits server
console.log(promise1 === promise3) // falseUses mem for Memoization
memoizeConcurrent uses mem under the hood and supports the same options
import memo from 'memoize-concurrent'
const memoizedFetch = memo(fetch, {
maxAge: 10, // maxAge of value in cache
cacheKey: (args) => args[0], // function to compute cache key
cache: new Map(), // provide your own cache
})MIT