Hello World Observable

by gladtocode

HTML

<body>
  <div id="div">
    Values:  
  </div>
</body>

CSS

div {
  height: 500px;
}

JavaScript

const print = (value) => {
  const paragraph = document.createElement('p');
  paragraph.innerHTML = value;
  document.getElementById('div').appendChild(paragraph);
}

const helloObservable = (callback) => {
  callback('Hello')
  callback('World')
  callback('How are you')
  setTimeout(() => callback('Today?'), 3000);
}

helloObservable(print);