Basic TS Class

interface App {
    let age: number
    let date: number
}

class Big {
    name: string
    job: string
    constructor(val:string, val_2: string){
      this.val = name
      this.val_2 = job
    }
}

function reader(data:App){
    let show = document.querySelector('#block')
    let all = new Big('oliver','dev.')
    return show.innerHTML = `I'm ${all.name} and 
    I'm ${data.age} years old!`.concat(`I work as a ${all.job}`)
}

const sets = {age: 20, date:150698}

reader(sets)

This is an example of Interface over a function using Class Atributtes.