@emotion/weak-memoize

A memoization function that uses a WeakMap

Install

yarn add @emotion/weak-memoize

Usage

Because @emotion/weak-memoize uses a WeakMap the argument must be a non primitive type, e.g. objects, functions, arrays and etc. The function passed to weakMemoize must also only accept a single argument.

import weakMemoize from '@emotion/weak-memoize'
 
let doThing = weakMemoize(({ someProperty }) => {
  return { newName: someProperty }
})
 
let obj = { someProperty: true }
 
let firstResult = doThing(obj)
 
let secondResult = doThing(obj)
 
firstResult === secondResult // true
 
let newObj = { someProperty: true }
 
let thirdResult = doThing(newObj)
 
thirdResult === firstResult // false