Create confirm Email field after email field

Create_Confirm_Email_Field

class Create_Confirm_Email_Field {

	public $email_required_msg = '';
	public $email_not_matched = '';

	public function __construct() {
		add_action( 'wfacp_after_billing_email_field', [ $this, 'create_field' ] );
		add_action( 'wfacp_template_load', [ $this, 'action' ] );

		/* validation for first step */
		add_action( 'wfacp_internal_css', [ $this, 'internal_script' ] );
	}

	public function action() {
		$this->email_required_msg = __( '<b>Confirm E-Mails</b> is a required field.', 'woocommerce' );
		$this->email_not_matched  = __( '<b>Confirm E-Mails</b> do not match.', 'woocommerce' );

		add_action( 'woocommerce_after_checkout_validation', [ $this, 'matching_email_addresses' ], 8, 2 );

	}

	public function create_field() {
		$this->field = array(
			'label'       => __( 'Confirm Email Address', 'woocommerce-email-validation' ),
			'type'        => 'email',
			'field_type'  => 'billing',
			'placeholder' => _x( 'Email Address', 'placeholder', 'woocommerce-email-validation' ),
			'required'    => true,
			'input_class' => [ 'wfacp-form-control' ],
			'label_class' => [ 'wfacp-form-control-label' ],
			'class'       => apply_filters( 'woocommerce_confirm_email_field_class', [ 'wfacp-form-control-wrapper  wfacp-col-full ' ] ),
			'clear'       => true,
			'validate'    => array( 'email' ),
			'id'          => 'billing_email_2',
		);

		woocommerce_form_field( 'billing_email_2', $this->field );

	}

	public function matching_email_addresses( $data, $errors ) {
		$email1 = $_POST['billing_email'];
		$email2 = $_POST['billing_email_2'];

		if ( empty( $email2 ) ) {
			$errors->add( 'validation', $this->email_required_msg );
		} elseif ( $email2 !== $email1 ) {
			$errors->add( 'validation', $this->email_not_matched );
		}

	}

	public function internal_script() {
		?>


        <script>
            (function ($) {
                $(document).ready(function () {

                    var empty = '<?php echo $this->email_required_msg; ?>';
                    var not_match = '<?php echo $this->email_not_matched; ?>';


                    wfacp_frontend.hooks.addAction('wfacp_fields_validation', validation_check);
                    wfacp_frontend.hooks.addFilter('wfacp_field_error_message', error_msg);


                    if ($('#billing_email').length > 0 && $('#billing_email_2').length > 0) {

                        $('body').on('focusout', '#billing_email_2', function () {
                            validation_check();

                        });
                    }


                    function error_msg(msg) {


                        if (msg == '<strong>Confirm Email Address</strong>  is a required field.') {
                            return empty;
                        }
                        if (msg == '<strong>Confirm Email Address</strong>  is not a valid email address.') {
                            return not_match;
                        }

                        return msg;
                    }

                    function validation_check() {

                        var billing_email = $('#billing_email').val();
                        var billing_email_2 = $('#billing_email_2').val();

                        if ($('#billing_email_field').length > 0 && $('#billing_email_2_field').length > 0) {

                            if (billing_email === '' || billing_email_2 === '') {
                                return;
                            }
                            if (billing_email_2 != billing_email) {
                                $('#billing_email_2_field').addClass('woocommerce-invalid woocommerce-invalid-email woocommerce-invalid-required-field');

                            } else {
                                $('#billing_email_2_field').removeClass('woocommerce-invalid woocommerce-invalid-email woocommerce-invalid-required-field');
                            }
                        }


                    }
                });

            })(jQuery);

        </script>
		<?php
	}


}

new Create_Confirm_Email_Field();