FlowJS: Extract type from Union

user_3361908 0
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Is it possible in flowjs to extract type from Union type?

I tried the following example, but no luck.

type ExtractType = <T>(T | () => T) => T;
type Config = string | () => string;
type S = $Call<ExtractType, Config>;

const str1: S = 'str'; // Error: requires function
const str2: S = () => 'str'; // Error: requires string

try flow

flowtype javascript
1 Answers

I simplified the very first line a bit, and it seems to do the job:

type ExtractType = <T>(T) => T;
user_59138380
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