Merge complex array of object

merge.js

[
  {
    data: [{ x: 1, y: 2 }, { x: 3, y: 4 }]
  },
  {
    data: [{ x: 5, y: 6 }, { x: 7, y: 8 }]
  }
].map(({ data }) => data).reduce((acc, cur, i, arr) => {
  acc.push(cur.map(({x, y}) => ({ [`x${i}`]: x, [`y${i}`]: y })))
  return acc
}, []).reduce((acc, cur, i, arr) => {
  if (acc.length > 0) {
    cur.forEach((data, index) => acc[index] = { ...acc[index], ...data})
  } else {
    cur.forEach(data => acc.push(data))
  }
  return acc
}, [])

[
  {
    "x0": 1,
    "y0": 2,
    "x1": 5,
    "y1": 6
  },
  {
    "x0": 3,
    "y0": 4,
    "x1": 7,
    "y1": 8
  }
]