longestCommonPrefix-full.js

/**
 * @param {string[]} strings
 * @return {string}
*/
const longestCommonPrefix = (strings) => {
  if (strings.length === 1) {
      return strings[0];
  }

  const sortedStrings = strings.sort();
  const first = sortedStrings.at(0).split('');
  const last = sortedStrings.at(-1);
  let result = '';

  first.every((letter, index) => {
    if (letter === last[index]) {
      return result += letter;
    }
  });

  return result;
};