ES6 Symbols in your ES5.
JavaScript
Latest commit e2e41b5 May 25, 2016 @seanmonstar v0.3.0

README.md

Symbols

NPM version

ES6 Symbols, in your ES5.

If Symbol is already defined, it will be used. Otherwise, this implements as much of the Symbol spec as is possible with plain JavaScript.

Usage

var Symbol = require('symbol');
var key = Symbol();

var obj = {};
obj[key] = 'foo';
console.log(obj[key]); // 'foo'
console.log(Object.keys(obj)); // []