Understanding the `declare` Keyword in TypeScript

Soumyadip Majumder 100

// Example
interface Backpack<Type> {
    add: (obj: Type) => void;
    get: () => Type;
}
declare const backpack: Backpack<string>;

What is the purpose of the declare keyword in TypeScript? Seeking clarification on its usage and context, especially for someone new to TypeScript.

Soumyadip Majumder 100 Reputation points

2025-04-18T08:46:25.08+00:00
After this code when I write this code:

const object = backpack.get();

App got crased!

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