Copy text from textbox to clipboard not working when deploy on IIS server ASP.NET C#

See more:

C#

ASP.NET

Javascript

Hi guys am trying to copy the text to clipboard using javascript in ASP.net and C# but its working fine in local when host in IIS server its not working please help me to fix the issue Thank you . code written below like in the t there is data

What I have tried:

<pre lang="Javascript">
function copytoclipboard(t) {
  alert("t =" + t);
   const txt = t;
   navigator.clipboard.writeText(txt + 'xyz')
       .then(() => { alert(`Copied  123!`) })
       .catch((error) => { alert(`Copy failed! ${error}`) })
   return;
}
C# code 
<pre lang="c#">
CopyClipAction.Val = MacroDesc;
Thread newThread = new Thread(new ThreadStart(ClipActionPR));
newThread.SetApartmentState(ApartmentState.STA);
      newThread.Start();