EN
TypeScript - create variable using generic Object<T> type
3 points
In this short article we would like to show how create variable using generic Object<T> type in TypeScript.
By default, TypeScript doesn't provide generic Object<T> type.
1. Create src/declaration.d.ts file and place there the following source code:
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interface ObjectConstructor {2
<T>(object: T): T;3
new <T>(object: T): T;4
}5
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declare Object: ObjectConstructor;
2. From now you can use Object<T> type int your project, e.g.:
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// ...2
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type User = {4
id: number;5
name: string;6
age: number;7
};8
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// ...10
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const user = new Object<User>({12
id: 1, // TypeScript compiler will force programmer to use proper fields here13
name: 'John', // TypeScript compiler will force programmer to use proper fields here14
age: 23 // TypeScript compiler will force programmer to use proper fields here15
});16
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// ...