copy something to clipboard code example

Example 1: js copy text to clipboard

function copy() {
  var copyText = document.querySelector("#input");
  copyText.select();
  document.execCommand("copy");
}

document.querySelector("#copy").addEventListener("click", copy);

Example 2: js select and copy on click

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