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TypeScript - get function return type
5 points
In this short article we would like to show how to get type of object returned by function in TypeScript.
Quick solution:
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const MyFunction = (): string => { return ''; }2
type MyType = ReturnType<typeof MyFunction>; // stringPractical example:
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type Action1 = () => void;2
type Action2 = () => string;3
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const Function1 = (): void => {5
console.log('void return');6
};7
const Function2 = (text: string): string => {8
return `Text: ${text}`;9
};10
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type Action1Result = ReturnType<Action1>; // void12
type Action2Result = ReturnType<Action2>; // string13
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type Function1Result = ReturnType<typeof Function1>; // void15
type Function2Result = ReturnType<typeof Function2>; // string16
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type Function1Result = ReturnType<() => void>; // void18
type Function2Result = ReturnType<() => string>; // string