Sum of array singles

[RazvanBugoi]

https://www.codewars.com/kata/59f11118a5e129e591000134/train/javascript

[RazvanBugoi]

function repeats(arr){
 const obj = {}
 let total = 0;

 arr.forEach( (element) => {
   return obj[element] ? obj[element] += 1 : obj[element] = 1
})
  for (const property in obj) {
    if (obj[property] == 1) { total += Number(property) }
}
  return total
};