Online Node.js Compiler

const str = 'schooeal'; const findLongestVowel = (str = '') => { let cur = 0 let max = 0 for (let i = 0; i < str.length; ++i) { if ("aeiou".includes(str[i])) { cur++ if (cur > max) { max = cur } } else { cur = 0 } } return max }; console.log(findLongestVowel(str));