how to copy text to the clipboard using javascript button-click code example

Example 1: copy text to clipboard jquery

function copyToClipboard(element) {
 var $temp = $("<input>");
 $("body").append($temp);
 $temp.val($(element).html()).select();
 document.execCommand("copy");
 $temp.remove();
}

Example 2: js select and copy on click

document.getElementById("copy-text").onclick = function() {
  this.select();
  document.execCommand('copy');
  alert(window.getSelection().toString());
}