JSFiddle - React, Tailwind, and code Playground

HTML

<div class='myDiv'>
    <input name="txtUsername" type="text"   placeholder="Enter Username" class="txtBox">
        <input name="txtUsername" type="text" placeholder="Enter password" class="txtBox">
</div>
       <input type="button" id="btnLogin" class="loginButton" value="clear" onclick="Clear();">

JavaScript

function Clear()
{      
     $('.myDiv input').each(function () {
   $(this).val("");
         x=1;
    });
        $('.myDiv input').first().focus();          

}