有这么个数组，我想让数组内每个元素都变成对象，然后返回一个新数组，如下图，怎么写？

Question

Answer 1

  let arr = [1, 2, 3, 4, 5]
  let newArr = arr.map(item => ({ id: item }))
  console.log(newArr);

Answer 2

  let arr = [1,2,3]
  let newArr = arr.map(item => {
    return {id: item}
  })
  console.log(newArr)

Answer 3

let arr = [1, 2, 3];
let newArr = arr.map(item => ({id: item}));
console.log(newArr); // 输出: [{id: 1}, {id: 2}, {id: 3}]