typescript get object properties code example

Example 1: define object properties typescript

interface ISomeObject {
  subPropertie1: string,
  subPropertie2: number,
}

interface IProperties {
  property1: string,
  property2: boolean,
  property3: number[],
  property4: ISomeObject,
  property5: ISomeObject[],
}

function (args:IProperties): void {		// Sample Usage
  console.log(args.property1);
}

Example 2: typescript get type of object property

type Data = {
  value: number;
  text: string;
};
type textProperty = Data["text"]; //string

//OR
const data = {
  value: 123,
  text: 'hello'
};
type textProperty = typeof data["text"]; //string