Disable a form field to stop users input data.

wpforms_readonly.php

/**
 * Disable form fields to make read-only
 * To apply, add CSS class 'wpmonks-readonly' (no quotes) to field in form builder
 *
 */
function wpmonks_disable_field() {
	?>
	<script type="text/javascript">

		jQuery(function($) {
			$(".wpmonks-readonly input").attr("readonly", true);
		});

	</script>
	<?php
}
add_action( 'wpforms_wp_footer', 'wpmonks_disable_field' );