``` const styles = { borderColor:"#999", borderThickness:"1px" } return ( <div className={isTrue?'red':'green'}><h1 className="question">{text}<hr/></h1> <h2 className={gettrue()}>{dateToString(new Date())}</h2> <h3 className={isTrue &&'p'}>{props.children}</h3> <input style={styles} //注释代码3 /* 注释代码2 */ref={myInputRef} /> ```