Is there a way to check if a string is included in a Union type in TypeScript? -

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consider following code:

type foo = "foo" | "bar" | "baz"  function isinfoo(str: string) boolean {     // return foo.contains(str); ? }

in typescript, there elegant way check if str in type foo?

type foo not compiled generated javascript. can not realized in elegant way. 1 option: use array specified strings, or @ these fields through enum.


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