ES6 Symbols in your ES5.

npm install symbol
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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.


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

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