I keep getting this error

I am trying to solve this warning.

CodePudding user response：

add key attribute with a unique identifier as the value

<li key={movies.id} .... // 

CodePudding user response：

If movies don't have an id and you just want to get rid of the warning, you can use the second argument of the map function, which returns the index:

movieDB[movie].map((movies, index) => {
  <li className='items' key={index}>
    ...
  </li>
})

CodePudding user response：

I think that every movie name is unique, so you can just

<li classname='items' key={movies.name}>