Find occurrences in 2 arrays & return an array of unique values

mutuals.js

// Find & return common occurences in 2 arrays & return the unique values in a new array; if there are no common occurences between the 2 arrays, provide a response 
 
let arr1 = ["Leila", "Fry", "Leila", "Bender"]
let arr2 = ["Leila", "Bender", "Fry", "Bailey"]
 
let commonFriends = []

// Iterate through 2 arrays & adds common values to empty list
findTheMutuals = (arr1, arr2) => { 
    for (let arr1Index = 0; arr1Index < arr1.length; arr1Index++){
        for (let arr2Index = 0; arr2Index < arr2.length; arr2Index++){
            if ( arr1[arr1Index] === arr2[arr2Index]){
            commonFriends.push(arr1[arr1Index])
        } 
    }
}
// conditional runs if there are matching values from both arrays
if (commonFriends.length > 0){
    // create new array of unique values
    commonFriends = Array.from(new Set(commonFriends))
    // sort array alphabetically & add space and comma between values
    let formattedArr = commonFriends.sort().join(", ")
    // display the length of values in common
    console.log(`You have ${commonFriends.length} friends in common. `)
    // display the common values
    console.log(`Mutual Friends: ${formattedArr}`)
} else {
    // runs if there are NO mutual values
    console.log("You have no mutual friends")
    }
}
// call function with 2 arrays 
findTheMutuals(arr1, arr2)