node package manager
Share your code. npm Orgs help your team discover, share, and reuse code. Create a free org »



spell is a dictionary module for node.js. for an explanation of the algorithm, performance, expectations, and techniques used please read this article



  1. install npm
  2. npm install spell
  3. var spell = require('spell');


  1. minimize spell.js
  2. load it into your webpage



// instantiate a new dictionary 
var dict = spell();
// load text into dictionary so we can train the dictionary to know 
// which words exists and which ones are more frequent than others 
dict.load("I am going to the park with Theo today. It's going to be the bomb");

normally you would generate the dictionary once and then re-use it so this code is unlikely and serves for demonstration purposes only. this should log:

[{"word": "the", "score": 2}, {"word": "theo", "score": 1}]

as there are two occurrences of the word the and one of the word theo

feeling lucky?




you can also add and remove words from the dictionary:


and you can reset the dictionary, making it empty:


if you want to export the dictionary:



when loading you can provide a compiled dictionary instead of free form text

  { corpus: 
    { "I"     : 1
    , "am"    : 1
    , "going" : 1
    , "to"    : 2
    , "the"   : 1
    , "park"  : 1

you can also provide options:

  • reset, defaults to true, meaning it will reset the dictionary before running load
  • store, defaults to true, meaning it will store the dictionary after running load
  • after_store, defaults to empty function, the callback function to run after store is done

e.g. to add text to an existing dict you could do:

dict.load("Better yet, chocolate", { reset: false } );

finally when adding words you can optionally give it a score:

dict.add_word('beer', {score: 100});

if you are working with words that include punctuation in your dictionary you might need to override the alphabet that is being used. e.g. you might want to add . & @ if you have a dictionary of email address. you can do that by:

// instantiate a new dictionary 
var dict = spell();
// load text into dictionary so we can train the dictionary to know 
// which words exists and which ones are more frequent than others 
dict.load("nuno@dino.saur pedro@space.ship");


by default dict is stored in process (memory) for each dictionary instance you create. however if you feel like storing the dictionary externally, or use a shared dictionary, you can:

an example using localStorage:

var dict = spell(
  { "get"   : function () { 
  , "store" : function (dict,after_store) { 
                window.localStorage.setItem('dict', JSON.stringify(dict));


check issues


everyone is welcome to contribute. patches, bug-fixes, new features

  1. create an issue so the community can comment on your idea
  2. fork spell
  3. create a new branch git checkout -b my_branch
  4. create tests for the changes you made
  5. make sure you pass both existing and newly inserted tests
  6. commit your changes
  7. push to your branch git push origin my_branch
  8. create an pull request


(oO)--',- in caos

# license

copyright 2012 nuno job <> (oO)--',--

licensed under the apache license, version 2.0 (the "license"); you may not use this file except in compliance with the license. you may obtain a copy of the license at

unless required by applicable law or agreed to in writing, software distributed under the license is distributed on an "as is" basis, without warranties or conditions of any kind, either express or implied. see the license for the specific language governing permissions and limitations under the license