Copy function value to clipboard with Pure JS

script.js

/* ====
ClipboardCopy: This accepts any given string and copys it into clipboard after desired operation.
==== */
function ClipboardCopy(str){
  /* Some login */
str = str.toLowerCase();
let convertedStr = str.split(" ").join("-");
  /* Copy code */
let $tempInput = document.createElement('INPUT');
document.body.appendChild($tempInput);
$tempInput.setAttribute('value', convertedStr)
$tempInput.select();
document.execCommand('copy');
document.body.removeChild($tempInput);
}