An ESnext spec-compliant Set
shim/polyfill/replacement that works as far down as ES3.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
npm install --save es-set
var set = new Set();
var obj = {};
set.add(obj);
set.has(obj); // true
map.has(3); // false
Simply clone the repo, npm install
, and run npm test