maximum length of string in javascript code example

Example 1: javascript max characters string function

const getMaxLetter = (str) => {
  let max = 0;
  let maxChar = '';
  str.split('').forEach((char) => {
    if (str.split(char).length > max) {
      max = str.split(char).length - 1;
      maxChar = char;
    }
  });
  return `The max letter is : ${maxChar} and the max number of times it is seen is: ${max} times`;
};

Example 2: max string size javascript

(function() {
    strings = ["z"];
    try {
        while(true) {
            strings.push(strings[strings.length - 1] + strings[strings.length - 1]);
        }
    } catch(err) {
        var k = strings.length - 2;
        while(k >= 0) {
            try {
                strings.push(strings[strings.length - 1] + strings[k]);
                k--;
            } catch(err) {}
        }
        console.log("The maximum string length is " + strings[strings.length - 1].length);
    }
})();