// Create a typed Promise that resolves to a string const fetchGreeting = (): Promise<string> => { return new Promise((resolve, reject) => { setTimeout(() => { const success = Math.random() > 0.5; if (success) { resolve("Hello, TypeScript!"); } else { reject(new Error("Failed to fetch greeting")); } }, 1000); }); }; // Using the Promise with proper type inference fetchGreeting() .then((greeting) => { // TypeScript knows 'greeting' is a string console.log(greeting.toUpperCase()); }) .catch((error: Error) => { console.error("Error:", error.message); });