// get the text from the DOM Element: 
const textToCopy = document.querySelector('#url').innerText

// when someone clicks on the <a class="copy-text"> element 
// (which should be a <button>), execute the copy command:
document.querySelector('#copyURL').addEventListener('click' , ()=> {
  navigator.clipboard.writeText(textToCopy).then(
    function() {
      /* clipboard successfully set */
    //   window.alert('Success! The text was copied to your clipboard') 
    document.getElementById("copyURL").value = "Copied!";
    }, 
    function() {
      /* clipboard write failed */
      window.alert('Opps! Your browser does not support the Clipboard API')
    }
  )
})