///short code 
[wpens_easy_newsletter firstname="no" lastname="no" button_text="SIGN UP"]

var input = document.querySelectorAll('.wpens_email');
input.forEach(function(single){
   single.setAttribute('placeholder', 'YOUR EMAIL');
});


//for elementor
function ti_custom_javascript() {
    ?>
        <script>
          var input = document.querySelectorAll('.wpens_email');
input.forEach(function(single){
   single.setAttribute('placeholder', 'Enter your email to subscribe');
});
        </script>
    <?php
}
add_action('wp_footer', 'ti_custom_javascript');