Showing unique characters in a string only once

Question

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc.

Answer 1

Here is the simplest function to do that pt. 2

const showUniqChars = (text) => {
  let uniqChars = "";

  for (const char of text) {
    if (!uniqChars.includes(char))
      uniqChars += char;
  }
  return uniqChars;
};