001    package org.apache.tapestry5;
002    
003    /**
004     * Constants used when rendering a CSS class attribute.
005     */
006    public class CSSClassConstants
007    {
008        /**
009         * CSS class name that causes a rendered element to be invisible on the client side.
010         */
011        public static final String INVISIBLE = "t-invisible";
012        /**
013         * All purpose CSS class name for anything related to Tapestry errors.
014         */
015        public static final String ERROR = "t-error";
016        /**
017         * CSS class name for individual validation errors.
018         * 
019         * @since 5.2.0
020         */
021        public static final String ERROR_SINGLE = "t-error-single";
022    }