Copy to Clipboard in JavaScript

<!-- The text field -->
<input type="text" value="Hello World" id="myInput">

<!-- The button used to copy the text -->

<button onclick="myFunction()">Copy text</button> 

function myFunction() {

  // Get the text field
  var copyText = document.getElementById("myInput");

  // Select the text field
  copyText.select();
  copyText.setSelectionRange(0, 99999); // For mobile devices

   // Copy the text inside the text field
  navigator.clipboard.writeText(copyText.value);

  // Alert the copied text
  alert("Copied the text: " + copyText.value);
}