TypeScript Tutorial #2 - Object Literal Annotations
#Annotations #Typescript
In JavaScript, the fundamental way that we group and pass around data is through objects. In TypeScript, we represent those through object types.
function greet(person: { name: string; age: number }) {
return "Hello " + person.name;
}
or they can be named by using either an interface
interface Person {
name: string;
age: number;
}
function greet(person: Person) {
return "Hello " + person.name;
}
or a type alias.
type Person = {
name: string;
age: number;
};
function greet(person: Person) {
return "Hello " + person.name;
}
Each property in an object type can specify a couple of things: the type, whether the property is optional, and whether the property can be written to.
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