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matthieuprat/playground.js

Last active March 9, 2017 11:13
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Enumerability and ownership of Symbol properties
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playground.js
const s = Symbol()
const o = { [s]: 1 }
o.hasOwnProperty(s)
//-> true
Object.getOwnPropertyNames(o)
//-> []
Object.getOwnPropertySymbols(o)
//-> [Symbol()]
o.propertyIsEnumerable(s)
//-> true
Object.keys(o)
//-> []
Object.entries(o)
//-> []
Object.assign({}, o)[s]
//-> 1
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