How to add Copy text button to blog

 Hari Om 

Here is the html code to add "copy button" to your blog

<p>
  <textarea class="js-copytextarea">
  Sample Text to be copied</textarea><br />
</p>
<p>
  <button class="js-textareacopybtn">Copy it</button>
</p>

<script>
var copyTextareaBtn = document.querySelector('.js-textareacopybtn');
copyTextareaBtn.addEventListener('click', function(event) {
  var copyTextarea = document.querySelector('.js-copytextarea');
  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');
  }
});
</script>

Example 

Sample Text to be copied