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gilles-gardet/Conditionally assign other values when value is null and undefined using nullish coalescing (??) Operator.js

Last active April 3, 2022 13:29
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Conditionally assign other values when value is null and undefined using nullish coalescing (??) Operator.js
let data = undefined ?? 'noData'
console.log(data) // noData
data = null ?? 'noData'
console.log(data) // noData
data = '' ?? 'noData'
console.log(data) // ''
data = 0 ?? null ?? 'noData'
console.log(data) // 0
// when we assign value based on itself value it is "Shorthand" way
data ??= 'noData'
console.log(data) // 0
Confuse 😕 with OR(||) Operator ??
OR operator used when you want conditionally assign other value if the value is not truthy(0,’ ’, null, undefined, false, NaN)
let data = undefined || 'noData'
console.log(data) // noData
data = null || 'noData'
console.log(data) // noData
data = '' || 'noData'
console.log(data) // noData
data = 0 || null || 'apple'
console.log(data) // apple
// when we assign value based on itself value it is "Shorthand" way
data ||= 'noData'
console.log(data) // apple
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