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js-lc-commonprefix·javascript·leetcode
function longestCommonPrefix(strs) {
  if (!strs.length) return "";
  let prefix = strs[0];
  for (let i = 1; i < strs.length; i++) {
    while (!strs[i].startsWith(prefix)) {
      prefix = prefix.slice(0, -1);
      if (!prefix) return "";
    }
  }
  return prefix;
}