typescript type check function code example
Example 1: custom types in typescript
type Websites = 'www.google.com' | 'reddit.com';
let mySite: Websites = 'www.google.com'
let mySite: Website = 'www.yahoo.com'
type Details = { id: number, name: string, age: number };
let student: Details = { id: 803, name: 'Max', age: 13 };
let student: Details = { id: 803, name: 'Max', age: 13, address: 'Delhi' }
let student: Details = { id: 803, name: 'Max', age: '13' };
Example 2: typescript function type
function sayHello(name: string): string {
console.log(`Hello, ${name}`!);
}
sayHello('Bob');
Example 3: typescript function type
interface Date {
toString(): string;
setTime(time: number): number;
}