<div class="hello">
  <h1>resize & copy</h1>
</div>
const title = document.querySelector(".hello:first-child h1");

function handleWindowResize(){
document.body.style.backgroundColor = 'tomato';
}

function handleWindowCopy(){
  alert('copier!');
}

window.addEventListener('resize', handleWindowResize);
window.addEventListener('copy', handleWindowCopy);

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.