array max item value

by Oleh Kotsubko

HTML

<span id="result"></span>

JavaScript

let arr_1 = [1,3,5,7,9],
    arr_2 = [2,4,7,10,3],
    arr_3 = [2,1,8,5,4],
    sum = [],
    res = arr_1;
    sum.push(arr_1, arr_2, arr_3);
    
(() => {
  for (var i=0; i < sum.length; i++) {
    for (var j=0; j < sum[i].length; j++){
      if (sum[i][j] > res[j]) {
          res[j] = sum[i][j];
      } 
    }
  }
  console.log(res);
})();