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charlypoly/retool-typescript-control-flow-analysis-11.ts

Created November 29, 2021 11:15
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TypeScript Discriminated Unions on destructured properties
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retool-typescript-control-flow-analysis-11.ts
type UserArg = PremiumUser | USer
function processUSer({ plan, premiumOptions }: UserArg) {
if (plan === "premium") {
premiumOptions
// `premiumOptions` is of type `PremiumOptions`
} else {
premiumOptions
// `premiumOptions` is of type `undefined`
}
}
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