Hunspell-like spell-checker in plain-vanilla JavaScript.

nspell contains most of the essential core of Hunspell. It does not contain a tokeniser but leaves many details up to implementors. The main difference, conceptually, is that Hunspell is based on the user and their preferences, whereas nspell is based on explicitly passed in options, thus producing the same results regardless of OS, file system, or environment.

• Install
• Use
• API
  • NSpell(dictionary)
  • NSpell#correct(word)
  • NSpell#suggest(word)
  • NSpell#spell(word)
  • NSpell#add(word[, model])
  • NSpell#remove(word)
  • NSpell#wordCharacters()
  • NSpell#dictionary(dic)
  • NSpell#personal(dic)
• Dictionaries
  • Affix documents
  • Dictionary documents
  • Personal dictionary documents
  • Affix options
• License

npm:

npm install nspell

You probably also want to install some dictionaries:

npm install dictionary-en

var dictionary = require('dictionary-en')
var nspell = require('nspell')

dictionary(ondictionary)

function ondictionary(err, dict) {
  if (err) {
    throw err
  }

  var spell = nspell(dict)

  console.log(spell.correct('colour')) // => false
  console.log(spell.suggest('colour')) // => ['color']
  console.log(spell.correct('color')) // => true
  console.log(spell.correct('npm')) // => false
  spell.add('npm')
  console.log(spell.correct('npm')) // => true
}

Create a new spell checker. Passing an affix document is required, through any of the below mentioned signatures. nspell is useless without at least one dic passed: make sure to pass one either in the constructor or to nspell#dictionary.

• NSpell(dictionary)
• NSpell(aff[, dic])
• NSpell(dictionaries)

• dictionary (Object) — Object with aff (required) and dic (optional) properties
• aff (Buffer or string) — Affix document to use. Must be in UTF-8 when buffer
• dic (Buffer or string) — Dictionary document to use. Must be in UTF-8 when buffer
• dictionaries (Array.<Dictionary>) — List of dictionary objects. The first must have an aff key, other aff keys are ignored

New instance of NSpell.

Check if word is correctly spelled.

spell.correct('color') // => true
spell.correct('html') // => false
spell.correct('abreviation') // => false

• word (string) — Word to check for correct spelling

boolean — Whether word is correctly spelled.

Suggest correctly spelled words close to word.

spell.suggest('colour') // => ['color']
spell.suggest('color') // => []
spell.suggest('html') // => ['HTML']
spell.suggest('alot') // => ['allot', 'slot', 'clot', …]

• word (string) — Word to suggest spelling corrections for

Array.<string> — List with zero or more suggestions.

Get spelling information for word.

spell.spell('colour') // => {correct: false, forbidden: false, warn: false}
spell.spell('color') // => {correct: true, forbidden: false, warn: false}

• word (string) — Word to check

Object, with the following properties:

• correct (boolean) — Whether word is correctly spelled
• forbidden (boolean) — Whether word is actually correct, but forbidden from showing up as such (often by the users wish)
• warn (boolean) — Whether word is correct, but should trigger a warning (rarely used in dictionaries)

Add word to known words. If no model is given, the word will be marked as correct in the future, and will show up in spelling suggestions. If a model is given, word will be handled the same as model.

spell.correct('npm') // => false
spell.suggest('nnpm') // => ['ppm', 'bpm', …]

spell.add('npm')

spell.correct('npm') // => true
spell.suggest('nnpm') // => ['npm']

• word (string) — Word to add
• model (string, optional) — Known word to model word after

NSpell — Operated on instance.

Remove word from the known words.

spell.correct('color') // => true

spell.remove('color')

spell.correct('color') // => false

• word (string) — Word to add

NSpell — Operated on instance.

Get extra word characters defined by the loaded affix file. Most affix files don’t set these, but for example the en dictionary sets 0123456789.

spell.wordCharacters() // => '0123456789'

string? — Defined word characters, if any.

Add an extra dictionary to the spellchecker.

spell.dictionary(
  ['5', 'npm', 'nullish', 'rebase', 'SHA', 'stringification'].join('\n')
)

• dic (Buffer or string) — Dictionary document to use; must be in UTF-8 when buffer

NSpell — Operated on instance.

The given dic must be designed to work with the already loaded affix. It’s not possible to add dictionary files from different languages together (use two NSpell instances for that).

Add a personal dictionary.

spell.personal(['foo', 'bar/color', '*baz'].join('\n'))

• dic (Buffer or string) — Dictionary document to use; must be in UTF-8 when buffer

NSpell — Operated on instance.

Lines starting with a * mark a word as forbidden, which results in them being seen as incorrect, and prevents them from showing up in suggestions. Splitting a line in two with a slash, adds the left side and models it after the already known right word.

nspell supports many parts of Hunspell-style dictionaries. Essentially, the concept of a dictionary consists of one “affix” document, and one or more “dictionary” documents. The documents are tightly linked, so it’s not possible to use a Dutch affix with an English dictionary document.

Below is a short introduction, see hunspell(5) for more information.

Affix documents define the language, keyboard, flags, and much more. For example, a paraphrased Dutch affix document looks as follows:

SET UTF-8

KEY qwertyuiop|asdfghjkl|zxcvbnm|qawsedrftgyhujikolp|azsxdcfvgbhnjmk|aze|qsd|lm|wx|aqz|qws|

WORDCHARS '’0123456789ij.-\/

REP 487
REP e en
REP ji ij
REP u oe
# …

SFX An Y 11
SFX An 0 de d
SFX An 0 fe f
SFX An 0 ge g
# …

Not every option is supported in nspell. See Affix options for a list of all options and which ones are supported.

Dictionary documents contain words and flags applying to those words. For example:

3
foo
bar/a
baz/ab

The above document contains three words, as the count on the first line shows. Further lines each start with a word. Some lines contain flags, as denoted by the slashes. What those flags do, and the size of flags, is defined by affix documents.

Personal dictionaries are not intertwined with affix document. They define new words and words to forbid. For example:

foo
bar/baz
*qux

In the above example, foo is added as a known word; bar is added as well, but modelled after the existing word baz; finally, qux is marked as a forbidden word.

The following affix options are known to Hunspell. The checked ones are supported by nspell.

• SET encoding (UTF-8 is implied)
• FLAG value
• COMPLEXPREFIXES
• LANG langcode
• IGNORE characters
• AF number_of_flag_vector_aliases
• AF flag_vector
• AF definitions in the affix file:
• AF flag_vector

• KEY characters_separated_by_vertical_line_optionally
• TRY characters
• NOSUGGEST flag
• MAXCPDSUGS num
• MAXNGRAMSUGS num
• MAXDIFF [0-10]
• ONLYMAXDIFF
• NOSPLITSUGS
• SUGSWITHDOTS
• REP number_of_replacement_definitions
• REP what replacement
• MAP number_of_map_definitions
• MAP string_of_related_chars_or_parenthesized_character_sequences
• PHONE number_of_phone_definitions
• PHONE what replacement
• WARN flag
• FORBIDWARN

• BREAK number_of_break_definitions
• BREAK character_or_character_sequence
• COMPOUNDRULE number_of_compound_definitions
• COMPOUNDRULE compound_pattern
• COMPOUNDMIN num
• COMPOUNDFLAG flag
• COMPOUNDBEGIN flag
• COMPOUNDLAST flag
• COMPOUNDMIDDLE flag
• ONLYINCOMPOUND flag
• COMPOUNDPERMITFLAG flag
• COMPOUNDFORBIDFLAG flag
• COMPOUNDMORESUFFIXES
• COMPOUNDROOT flag
• COMPOUNDWORDMAX number
• CHECKCOMPOUNDDUP
• CHECKCOMPOUNDREP
• CHECKCOMPOUNDCASE
• CHECKCOMPOUNDTRIPLE
• SIMPLIFIEDTRIPLE
• CHECKCOMPOUNDPATTERN number_of_checkcompoundpattern_definitions
• CHECKCOMPOUNDPATTERN endchars[/flag] beginchars[/flag] [replacement]
• FORCEUCASE flag
• COMPOUNDSYLLABLE max_syllable vowels
• SYLLABLENUM flags

• PFX flag cross_product number
• PFX flag stripping prefix [condition [morphological_fields…]]
• SFX flag cross_product number
• SFX flag stripping suffix [condition [morphological_fields…]]

• CIRCUMFIX flag
• FORBIDDENWORD flag
• FULLSTRIP
• KEEPCASE flag
• ICONV number_of_ICONV_definitions
• ICONV pattern pattern2
• OCONV number_of_OCONV_definitions
• OCONV pattern pattern2
• LEMMA_PRESENT flag
• NEEDAFFIX flag
• PSEUDOROOT flag
• SUBSTANDARD flag
• WORDCHARS characters
• CHECKSHARPS

MIT © Titus Wormer