Generics-For-Interfaces

Generics For Interfaces

Sources

• TS Docs
• Antonin Januska's Video Explainer

Generics are stand ins used for representing other types of data being passed through an interface or through a function.

Interfaces

Generics can be used for interfaces. It is great for type hinting and type safety.

interface Model<T> {
    id: number;
    value: T;
}

let newModel: Model<string> = { id: 1, value: 'Brenda' };

console.log(newModel);
// [LOG]: {
//   "id": 1,
//   "value": "Brenda"
// } 

The above creates a Model interface which uses a generic for the value type.

We can take advantage of this when we create new instances of this interface by using Model<string>. In the above case a string.

#JavaScript
#TypeScript