Context

Traditionally, spell checking is performed server-side; however, this isn't a necessity. The spell_check_on_client package brings efficient, offline spell checking directly to the client side, saving on cloud costs and providing rapid response times.

By embedding a compact 1.5MB dictionary text file, your application can perform spell checks in under 200ms, reducing latency and preserving data privacy.

How this package works

This package uses an hashset comparison algorithm to deliver a spell check that can work offline in the client side

Features

• Tokenize a string with multiple words into single word tokens
• Let the programmer configure what are the words so it can work in a multi language way
• Find words in your text that are not in the dictionary
• apply operations to find what are the possible words similar enough that belong to the dictionary
• operations supported to find words: addition, deletion, swap, replace

Getting started

In this video I show how to run the example app of this package:

https://www.youtube.com/watch?v=YbMR9CEbvCE

Add the dependency to your pubspec.yaml:

spell_check_on_client: ^0.0.8

Usage

To use this package you will need to add the list of words as an asset inside your app:

• German - de_words.txt
• English - en_words.txt
• Spanish - es_words.txt
• French - fr_words.txt
• Italian - it_words.txt
• Norwegian - no_words.txt
• Portuguese - pt_words.txt
• Swedish - sv_words.txt

You can find the file assets here:

https://github.com/ivofernandes/spell_check_on_client/tree/master/example/assets

Then you need to init the check spell in an async method:

 SpellCheck
  void initSpellCheck() async {
      String language = 'en';
      String content = await rootBundle.loadString('assets/${language}_words.txt');
       spellCheck = SpellCheck.fromWordsContent(content,
          letters: LanguageLetters.getLanguageForLanguage(language));
  }

Then you just need to call the did you mean method to receive a suggestion or an empty string if every word exists

  String didYouMean = spellCheck.didYouMean(text);

If it looks to hard to use you can always start your app by forking this example app: https://github.com/ivofernandes/spell_check_on_client/blob/master/example/lib/main.dart

Like us on pub.dev

Package url: https://pub.dev/packages/spell_check_on_client

Instruction to publish the package to pub.dev

dart pub publish