Interface
Interfaces in TypeScript are used to define agreements for objects. They can contain properties, methods, and method signatures. Interfaces can be implemented by classes to enforce a specific structure and ensure that the class adheres to the contract defined by the interface. Interfaces support multiple inheritance, where a class can implement multiple interfaces.
Syntax
interface MyInterface {
// Interface properties and methods
}
Example
In this example, we will see the implementation of the Interface.
Javascript
// Interface.ts interface Person { name: string; age: number; } const person: Person = { name: "John Doe", age: 25, }; console.log(person.name); console.log(person.age); |
Output
"John Doe" // person.name
25 // person.age
TypeScript Interface vs Type Statements
In TypeScript, both “interface” and “type” statements are used to define the shape or structure of an object or a type. They provide a way to define custom types and enforce type checking in TypeScript code. However, there are some differences between the two.