TypeScript

by manoj_antony32

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
  text-align: center;
}

TypeScript

interface Person {
  firstName: string;
  lastName:  string;
}

function greeter(person: Person) {
  return "Hello, " + person.firstName + " " + person.lastName;
}

let user = {
	firstName: "Malcolm",
  lastName:  "Reynolds"
};

document.querySelector("#app").innerHTML = greeter(user);

console.log(greeter(user))

 interface Todo {
  title: string;
  description: string;
}
  
function updateBook(book: Todo, updateDesc: string) {
 return { ...book, description: updateDesc }
}

const book = {
   title: 'Java Handbook',
   description: 'Had lot of features covered'
}
 
const updateBookDetail = updateBook(book, {
   description: 'Had lot of latest features covered'
});
 
console.log(book)
console.log(updateBookDetail);