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JavaScript

Posted by ammar javed
ammar javed
726 Points

set the id in array but still getting error Each child in an array or iterator should have a unique "key" prop.

Each child in an array or iterator should have a unique "key" prop.

this is the error coming even after setting id in each object of array

1 Answer

Jesus Mendoza
Jesus Mendoza
23,289 Points
Jesus Mendoza
Jesus Mendoza
23,289 Points

Is this happening on React?

If so, when returning an element from a forEach method you should assign it a property called key and assign a unique value to it.

For example:

elems.forEach((element, index) => {
   return (<li key={index}>{element}</li>);
});

The unique id in this case will be the index

ammar javed
ammar javed
726 Points

i am using javascript map function