Typo.js is a JavaScript/TypeScript spellchecker that uses Hunspell-style dictionaries.

To use Typo in a Chrome extension, simply include the typo.js file in your extension's background page, and then initialize the dictionary like so:

var dictionary = new Typo("en_US");

To use Typo in a standard web application you need to pass a settings object that provides a path to the folder containing the desired dictionary.

var dictionary = new Typo("en_US", false, false, { dictionaryPath: "typo/dictionaries" }),

If using in node.js, load it like so:

var Typo = require("typo-js");
var dictionary = new Typo([...]);

To check if a word is spelled correctly, do this:

var is_spelled_correctly = dictionary.check("mispelled");

To get suggested corrections for a misspelled word, do this:

var array_of_suggestions = dictionary.suggest("mispeling");

// array_of_suggestions == ["misspelling", "dispelling", "misdealing", "misfiling", "misruling"]

Typo.js has full support for the following Hunspell affix flags:

• PFX
• SFX
• REP
• FLAG
• COMPOUNDMIN
• COMPOUNDRULE
• ONLYINCOMPOUND
• KEEPCASE
• NOSUGGEST
• NEEDAFFIX

Note: The manifest.json file in the root directory of the project is there to simplify testing, as it allows you to load all of the files in the Typo project as a Chrome extension. It doesn't have any purpose if you're using Typo.js in your own project.

There's a live demo of Typo.js at http://www.chrisfinke.com/files/typo-demo/ and a complete Node.js example file at examples/node/index.js.

The full TypeScript source code and unit test suites are available in the official Typo.js repository at https://github.com/cfinke/Typo.js

To modify Typo.js, make your changes to ts/typo.ts and then run build.sh to generate the JavaScript file typo/typo.js.

Typo.js has been been used all over in real-world projects, but here are a few examples:

• Parola, a mobile word puzzle game
• A number of NPM packages

Typo.js is free software, licensed under the Modified BSD License.