2129, Capitalize the Title

Problem

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You are given a string title consisting of one or more words separated by a single space, where each word consists of English letters. Capitalize the string by changing the capitalization of each word such that:

If the length of the word is 1 or 2 letters, change all letters to lowercase.
Otherwise, change the first letter to uppercase and the remaining letters to lowercase.
Return the capitalized title.

Example 1:

Input: title = "capiTalIze tHe titLe"
Output: "Capitalize The Title"
Explanation:
Since all the words have a length of at least 3, the first letter of each word is uppercase, and the remaining letters are lowercase.

Example 2:

Input: title = "First leTTeR of EACH Word"
Output: "First Letter of Each Word"
Explanation:
The word "of" has length 2, so it is all lowercase.
The remaining words have a length of at least 3, so the first letter of each remaining word is uppercase, and the remaining letters are lowercase.

Example 3:

Input: title = "i lOve leetcode"
Output: "i Love Leetcode"
Explanation:
The word "i" has length 1, so it is lowercase.
The remaining words have a length of at least 3, so the first letter of each remaining word is uppercase, and the remaining letters are lowercase.

Constraints:

• 1 <= title.length <= 100
• title consists of words separated by a single space without any leading or trailing spaces.
• Each word consists of uppercase and lowercase English letters and is non-empty.

Solution

/**
 * @param {string} title
 * @return {string}
 */
var capitalizeTitle = function(title) {
    title = title.toLowerCase();
  title = title.split(" ");
  let first,
  rest,
  result = "";
  
  for (let i = 0; i < title.length; i++) {
    if(title[i].length > 2) {
    first = title[i].charAt(0).toUpperCase();
    rest = title[i].slice(1);
    result += first.concat(rest);
  } else {
    result += title[i];
  }
    if (i != title.length - 1) {
    result += " ";
  }
  }

  return result;
};