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React / TypeScript - generic function type in *.tsx

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In this short article we would like to show how to create generic type that can be used as arrow function type in *.tsx / Extended TypeScript.

Quick solution:

type Parser<T extends unknown> = (arg: string) => T;

const parseText: Parser<string[]> = (text: string) => {
    return text.split(',');


Alternative solutions:

type Parser<T extends any> = (arg: string) => T;
type Parser<T extends {}> = (arg: string) => T;


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