class TrieBlock {
  constructor (key) {
    this.related = new Map() // children (key => UID)
    this.key = key // node key in Trie
    this.eof = false // end-of-word stop flag
    this.data = null // additional embeded data, associated with a word
  }
}

// and the Trie
class Trie {
  constructor(debug) {
    this.debug = debug
    this.entries = new Map()
    this.entries.set(null, new TrieBlock()) // Trie ROOT block

  }

  insert(str, withData) {
    // ... ok for me !
  }

  has(word) {
    // walk through Trie
    // seek for the word
  }

  fetch(word) {
    // fetch the data associated with the word
  }
}

trie.insert('CAR', 'Vroom!')
trie.inseert('CAST', 'Habracadabra')
trie.inseert('CAR', 'Meow!')

* ROOT
    . C
      . A
        . R : Vroom!
        . S
          . T : Habracadra!
        . T : Meow!