Preventing multiple button clicks

There are scenarios when we need to disable a button to prevent multiple form submits. There can be many other ways, but following one tested and working for me.
Even though it is a kind of hack, it the easy way to achieve what needs to be happened

HTML

<asp:Button ID="btnSave" class="btn btn-sm" runat="server" Text="Save"  OnClientClick="DisableBtn(this);"  UseSubmitBehavior="false" />

JavaScript

<script type="text/javascript">

 function DisableBtn(btn) {
    btn.setAttribute('disabled', 'disabled');
   
    btn.click();

  }

</script >

Regards,
Samitha