selection-sort.js

function selectionSort(arr) {
    for (let i = 0; i < arr.length; i++) {
        let minIndex = i;

        for (let j = i + 1; j < arr.length; j++) {
            if (arr[j] < arr[minIndex]) {
                minIndex = j;
            }
        }

        if (i !== minIndex) {
            const lesser = arr[minIndex];
            arr[minIndex] = arr[i];
            arr[i] = lesser;
        }
    }

    return arr;
}

console.log(selectionSort([10, 4, 3, 8, -10]));
//output : [ 3, 4, 8, 10 ]