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20 lines
519 B
Markdown
20 lines
519 B
Markdown
6 years ago
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# Symbols
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[](http://badge.fury.io/js/symbol)
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[ES6 Symbols](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-symbol-objects), in your ES5.
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If `Symbol` is already defined, it will be used. Otherwise, this implements as much of the `Symbol` spec as is possible with plain JavaScript.
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## Usage
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```js
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var Symbol = require('symbol');
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var key = Symbol();
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var obj = {};
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obj[key] = 'foo';
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console.log(obj[key]); // 'foo'
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console.log(Object.keys(obj)); // []
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```
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