Simple Solution
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\n/**\n * @param {string} s\n * @return {number}\n */\nvar maxLengthBetweenEqualCharacters = function(s) {\n  let out=-1\n        for(let i=s.length-1;i>0;i--){\n            let holder=s.indexOf(s[i])\n            out=Math.max(out,i-(holder+1))\n        }\n\n  \n        return out\n    \n};\n```
['String', 'JavaScript']