in-memory cache for node and browser.


microcache.js is a micro library to handle in-memory cache (works in node+browser).

Install it

To install it on node

npm install microcache

To install the browser version, download it and include it like that

<script src="microcache.js"></script>   


To instanciate a cache, do the following. You can have as many instances you want.

var microcache = new MicroCache();


To get a cached asset which is in the cache. Each cached element has a unique key to identify it.


.set(key, value)

To set a element value in the cache.

microcache.set('foo', 'bar');


To know if a given asset is currently in the cache.



To return all the elements currently in the cache


.getSet(key, value)

To get an element from the cache, if it isnt already present, store it then return it.

microcache.getSet(key, value);

If second parameter is a function, it is called only if the key isnt contained in the cache. Thus the value isn't instanciated without need.

microcache.getSet(key, function(){ return value });


  • Q. what about plain var microcache = {} ? isnt this wrapper overengineering ?
  • A. i was thinking so too at first. but the syntax of a .getSet() without wrapper was too ugly for my taste :) var a = cache[key] = (cache[key] || value) from @floriancargoet