selectionSort.js

// Function for rinding min index of elemtnt in array

function smallest(arr) {
  let smallest[0];
  let smallestIndex = 0;
  
  for (let i = 0; i < arr.length; i ++) {
    if (arr[i] < smallest) {
      smallest = arr[i]
      smallestIndex = i
    }
  }
  return smallestIndex;
}

// Function for selected sorting

function selectionSort(arr) {
  let newArr = [];
  const length = arr.length;
  
  for (let j = 0; j < length; j++) {
    let smallestIndex = smallest(arr);
    newArr.push(+arr.splice(smallestIndex, 1).join(''))
  }
  return newArr;
}

console.log(selectionSort([5,3,6,2,10]));