sort by another array's order

sortByArr.js

// arr = [12,3,7]
// arr_source = [{id:1, name:'a'}, {id:2, name:'b'}, ..., {id:100, name:'xxxx'}]
// sort arr_source based on arr:
// [{id: 12, name: 'xx'}, {id: 3, name: 'xxx'}, {id: 7, name: 'xxx'}, …., {id: 100, name: 'xxxx'}]

const sortByArr = (targetArr, orderArr) => {
  let ret = orderArr.slice(0)
  targetArr.forEach((item,index) => {
    let orderIndex = orderArr.indexOf(item.id)
    if (orderIndex > -1) {
      ret[orderIndex] = item
      targetArr.splice(index,1)
    }
  })
  ret = ret.concat(targetArr)
  return ret
}

var arr = [12,3,7]
var arr_source = [...Array(100).keys()].map( index => ({ id:index, name:`${index}`}) )

var ret = sortByArr(arr_source,arr)