how to copy on click js code example

Example 1: how to enable click copy function using js

var copyTextareaBtn = document.querySelector('.js-textareacopybtn');

copyTextareaBtn.addEventListener('click', function(event) {
  var copyTextarea = document.querySelector('.js-copytextarea');
  copyTextarea.focus();
  copyTextarea.select();

  try {
    var successful = document.execCommand('copy');
    var msg = successful ? 'successful' : 'unsuccessful';
    console.log('Copying text command was ' + msg);
  } catch (err) {
    console.log('Oops, unable to copy');
  }
});

////html code below
<p>
  <button class="js-textareacopybtn" style="vertical-align:top;">Copy Textarea</button>
  <textarea class="js-copytextarea">Hello I'm some text</textarea>
</p>

Example 2: js copy paragraph onclick

var copy = document.querySelectorAll(".copy"); 

for (const copied of copy) { 
  copied.onclick = function() { 
    document.execCommand("copy"); 
  };  
  copied.addEventListener("copy", function(event) { 
    event.preventDefault(); 
    if (event.clipboardData) { 
      event.clipboardData.setData("text/plain", copied.textContent);
      console.log(event.clipboardData.getData("text"))
    };
  });
};