score:2
Accepted answer
the count
is not is not sorted. it just got updated when you sorted.
keys help react identify which items have changed, are added, or are removed. keys should be given to the elements inside the array to give the elements a stable identity
every time you sort, key
stay the same, as you use count
.
try using value
as key
export function parent(){
// ....
return (
<div>
<button onclick={handlesort}>sort</button>
{children.map(child => {
return <childcomp key={child.value} details={child}/> // key is important
})}
</div>
)
}
more info: https://reactjs.org/docs/lists-and-keys.html#keys
Source: stackoverflow.com
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