selectionSort.js

function selectionSort(arr) {
    for(let i = 0; i < arr.length; i++) {
        let smallest = i
        for(let j = i + 1; j < arr.length; j++) {
            if (arr[j] < arr[smallest]) {
                smallest = j
            }
        }
        if (smallest !== i) {
            [arr[i], arr[smallest]] = [arr[smallest], arr[i]]
        }
    }
    return arr
}

selectionSort([4,61,7,23,15,12,86,31])