Consecutive items

/*

You are given a list of unique integers arr, and two integers a and b. Your task is to find out whether or not a and b appear consecutively in arr, and return a boolean value (True if a and b are consecutive, False otherwise).

It is guaranteed that a and b are both present in arr.
*/

function consecutive(arr, a, b) {

  for(let i = 0; i < arr.length-1; i++){
     if (arr[i] == a) {
       return arr[i+1] == b
     
     } else if( arr[i] == b){
     return arr[i+1] == a 
   }
    }
  }