TypeScript 中的交集類型

1type A = { name: string };
2type B = { age: number };
3
4type C = A & B;
5
6const person: C = {
7    name: "John Doe",
8    age: 30
9};

 1interface Drivable {
 2    drive(): void;
 3}
 4
 5interface Flyable {
 6    fly(): void;
 7}
 8
 9type Vehicle = Drivable & Flyable;
10
11const car: Vehicle = {
12    drive() {
13        console.log("Driving on the road");
14    },
15    fly() {
16        console.log("Flying in the sky");
17    }
18};
19
20car.drive(); // "Driving on the road"
21car.fly();   // "Flying in the sky"

 1interface Person {
 2    name: string;
 3}
 4
 5interface Employee {
 6    employeeId: number;
 7}
 8
 9type PersonEmployee = Person & Employee;
10
11class CompanyWorker implements PersonEmployee {
12    constructor(public name: string, public employeeId: number) {}
13
14    getDetails() {
15        return `${this.name}, Employee ID: ${this.employeeId}`;
16    }
17}
18
19const worker = new CompanyWorker("Alice", 123);
20console.log(worker.getDetails()); // "Alice, Employee ID: 123"

1type A = { id: number };
2type B = { id: string };
3
4type C = A & B;
5
6// Error: Type 'number' and 'string' are not compatible
7const obj: C = {
8    id: 1
9};

 1type ContactInfo = { phone: string; email: string };
 2type Address = { city: string; postalCode: string };
 3
 4type PersonDetails = ContactInfo & Address;
 5
 6const details: PersonDetails = {
 7    phone: "123-4567",
 8    email: "example@mail.com",
 9    city: "New York",
10    postalCode: "10001"
11};
12
13console.log(details);

 1interface BasicInfo {
 2    name: string;
 3    age: number;
 4}
 5
 6interface WorkInfo {
 7    company: string;
 8    position: string;
 9}
10
11type FullInfo = BasicInfo & WorkInfo;
12
13const employee: FullInfo = {
14    name: "Bob",
15    age: 28,
16    company: "Tech Corp",
17    position: "Engineer"
18};
19
20console.log(`${employee.name} is a ${employee.position} at ${employee.company}`);