Thought Const participant:{}|{id:string}={}; const a = participant?.id || "no-id-given"; const participant<Partial<{id:string}>>={}; const a =

Question

Thought Const participant:{}|{id:string}={}; const a = participant?.id || "no-id-given"; const participant<Partial<{id:string}>>={}; const a =

participant?.id || "no-id-given";

const participant:{id?:string}={};
const a = participant?.id || "no-id-given";

would be all equivalent.

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15.05.2023

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David · Accepted Answer

David

For unions, you can only use properties/methods that are valid for all sides of the union. That is until you type narrow. if ("id" in participant) { console.log(participant.id); } I think that won't throw an error

0

16.05.2023

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Thought Const participant:{}|{id:string}={}; const a = participant?.id || "no-id-given"; const participant<Partial<{id:string}>>={}; const a =

1 ответов

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