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); }