Distinct Digit Year -Codewars Challenge-

I was solving a codewars challenge and got stuck in an endless loop. The task is to find from a given input like year 1987 the next greater integer that has only distinct digits. In that case it would be 2013 as 1988, 1998,2000 etc. do not have 4 distinct digits. I wanted to solve this task with an Object and see where the length of the Object.keys(obj) is equal to 4.

Here is my try

function distinctDigitYear(year) {
  
  let obj = {}
  let count = 1
  let yearCounter = year + count
  
  while (Object.keys(obj).length !==4) {
    obj = {}
    yearCounter.toString().split('').forEach(el=> {
      if(!Object.keys(obj).includes(el)){
        obj[el] = 1
      } else {
        obj[el] +=1
      }
    }
    )
   
      count++
  }
  return yearCounter + 1
}

distinctDigitYear(2000)

Thanks for reading!