Cycle with Repeat

I faced this problem: I need to write a program that will display a staircase in the console using repeat. And the staircase should be displayed in both directions.

The question is, can I add a method repeat to the function, so that it outputs to the console in steps of characters, like here, for example:

'      #'
'     ###'
'    #####'
'   #######'
'  #########'
' ###########'

Please advise me, or just give me a hint in what direction to dig. Below is the cycle that I use.

let i = 0;
let max = 6;
while (i < max) {
  let space = "";
  let tree = "";
  for (let j = 0; j < max - i; j++) space += " ";
  for (let j = 0; j < 2 * i + 1; j++) tree += "#";
  console.log(space + tree)
  i++
}

>Solution :

I am not very clear about your question. The following codes provide the same result as yours by the means of repeat function (String.prototype.repeat).

let layer = 6;
for (let i = 0; i < layer; ++i) {
    console.log(' '.repeat(layer - i) + '#'.repeat(1 + i * 2));
}