Understanding unique keys for array children in React.js

Question

I\'m building a React component that accepts a JSON data source and creates a sortable table.
Each of the dynamic data rows has a unique key assigned to it but I\'m stil

Answer 1

Best solution of define unique key in react: inside the map you initialized the name post then key define by key={post.id} or in my code you see i define the name item then i define key by key={item.id}:

                {posts.map(item =>(

                    

                        
{item.name}
                    

                
{item.username}
                
{item.email}
                    
                  
                ))}