first element is not pushing inside empty array in reactJS?

Question

trying to push data coming to "id" to "selectedUserId" array, but first element is not inserting. selectedUserId array does not contain first pushed element, push is only working from second element onwards.

   const handleSelectOne=(e)=>{
   const id = e.target.value;
 
   console.log(id,"handling")
   
   if(!selectedUserIds.includes(id))
   {
     selectedUserIds.push(id)
   }
   else 
   {
     selectedUserIds.pop(id)
   }
   
   setCheckedStatusOne(!checkedStatusOne[id])

   }


const handleDeleteSelectedClick=() =>{
   
let deletionItemsNo = selectedUserIds.length

selectedUserIds.map((id)=>{
 
  return console.log(id, "<== element inside selecteduserids array")
})
console.log(deletionItemsNo, "<== number of elements in array")
}

output console output

Answer 1

.pop() method doesn't accept any arguments. It used for removing the last array item.

To be able to insert element in the beginning you should use .unshift(id)