Longest Word in Dictionary LeetCode solution in JavaScript

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var longestWord = function (words) {
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  words.sort();
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  let trie = new Trie();
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  let result = "";
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  for (const word of words) {
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    if (word.length === 1) {
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      trie.insert(word);
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      result = word.length > result.length ? word : result;
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    } else {
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      let has = trie.search(word.slice(0, word.length - 1));
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      if (has) {
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        trie.insert(word);
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        result = word.length > result.length ? word : result;
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      }
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    }
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  }
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  return result;
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};