如何在反应列表中的每个孩子中添加唯一的关键道具？

Question

I keep getting this error

I am trying to solve this warning.

Answer 1

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>
})

Answer 2

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

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