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vaidd4/null-undefined-properties.js

Created May 21, 2019 13:17
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JS handling of undefined & null as object properties
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null-undefined-properties.js
let obj = { a: 'a', b: null, undefined: 'undef', null: 'nil' }
obj['a'] // 'a'
obj[obj.b] // 'nil'
obj[obj.c] // 'undef' (obj.c is undefined)
obj[obj] // undefined
// Can be used for making conditions with objects
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