A very basic example of generics using typescript.

employeeGenerics.ts

// Generics are types which can hold/use several types

let employeeNamesArray: Array<string>; // This array will only accept strings

// employeeNamesArray = [123]; // => Error
employeeNamesArray = ['Bob', 'Sam'];

console.log(employeeNamesArray); // Result => [ 'Bob', 'Sam' ]