hether the field is requires fieldset+legend markup on the frontend.
		 *
		 * @since 1.8.1
		 *
		 * @param bool  $requires_fieldset True if requires. Defaults to false.
		 * @param array $field             Field data.
		 */
		return (bool) apply_filters( "wpforms_frontend_modern_is_field_requires_fieldset_{$field['type']}", false, $field );
	}

	/**
	 * Field error.
	 *
	 * @since 1.8.1
	 *
	 * @param array $field     Field data and settings.
	 * @param array $form_data Form data and settings.
	 *
	 * @noinspection HtmlUnknownAttribute
	 */
	public function field_error( $field, $form_data ) {

		if ( empty( $field['properties']['error'] ) ) {
			return;
		}

		$error = $field['properties']['error'];

		printf(
			'<em %1$s>%2$s</em>',
			wpforms_html_attributes( $error['id'], $error['class'], $error['data'], $error['attr'] ),
			esc_html( $error['value'] )
		);
	}

	/**
	 * Define additional field properties.
	 *
	 * @since 1.8.1
	 *
	 * @param array $properties Field properties.
	 * @param array $field      Field settings.
	 * @param array $form_data  Form data and settings.
	 *
	 * @return array
	 */
	public function field_properties( $properties, $field, $form_data ) {

		$field_id = "wpforms-{$form_data['id']}-field_{$field['id']}";
		$desc_id  = "{$field_id}-description";

		// Add `id` to field description.
		$properties['description']['id'] = $desc_id;

		// Add attributes to error message.
		$properties['error']['attr']['role']       = 'alert';
		$properties['error']['attr']['aria-label'] = esc_html__( 'Error message', 'wpforms-lite' );
		$properties['error']['attr']['id']         = $properties['error']['attr']['for'] . '-error';
		$properties['error']['attr']['for']        = '';

		foreach ( $properties['inputs'] as $input => $input_data ) {

			// Add `aria-errormessage` to inputs (except hidden according to W3C requirements).
			if ( ! empty( $input_data['id'] ) && $field['type'] !== 'hidden' ) {
				$properties['inputs'][ $input ]['attr']['aria-errormessage'] = "{$input_data['id']}-error";
			}

			// Add `aria-describedby` to inputs.
			if ( ! empty( $field['description'] ) ) {
				$properties['inputs'][ $input ]['attr']['aria-describedby'] = $desc_id;
			}
		}

		return $properties;
	}

	/**
	 * Required label (asterisk) markup.
	 *
	 * @since 1.8.1
	 *
	 * @param string $label_html Required label markup.
	 *
	 * @return string
	 */
	public function get_field_required_label( $label_html ) {

		return ' <span class="wpforms-required-label" aria-hidden="true">*</span>';
	}

	/**
	 * Modify javascript `wpforms_settings` properties on the front end.
	 *
	 * @since 1.8.1
	 *
	 * @param array $strings Array `wpforms_settings` properties.
	 *
	 * @return array
	 */
	public function frontend_strings( $strings ) {

		$strings['isModernMarkupEnabled']  = wpforms_get_render_engine() === 'modern';
		$strings['formErrorMessagePrefix'] = esc_html__( 'Form error message', 'wpforms-lite' );
		$strings['errorMessagePrefix']     = esc_html__( 'Error message', 'wpforms-lite' );
		$strings['submitBtnDisabled']      = esc_html__( 'Submit button is disabled during form submission.', 'wpforms-lite' );

		return $strings;
	}
}