# code meaning Meaning of this code <nav> {Object.keys(AlphabetList).map(key => ( <Link className={ "pd10 nav " + (alphabetDefault === key ? 'active': '') } to={`/${key}`} key={key}>{AlphabetList[key].name}</Link> ))} </nav> 1-- alphbat list ek object hai. 2-- map arrya per kaam karta hai 3-- object.key object main se key nikalta hai or list bana kar deta hai. 4--/${key}` '/a' '/b' 5--key={key} matlab key={a}