Islyngten

Islyngten is a tiny JavaScript library supplying I18N translation support for Node.js and the browser. It provides simple, yet powerful solutions for multiple plural forms and interpolation. Islyngten has no dependencies.

Features

• Context support
• Simple plural form
• Multiple plural forms
• Interpolation

Getting started

Node.js

Install islyngten using npm.

npm install islyngten --save

Then require it into any module.

const Islyngten = require('islyngten');
const i18n = new Islyngten();

Browser

Islyngten has no dependencies, which makes it easy to include in a browser.

You can download the latest release from the repository

• islyngten.js unminified, including comments
• islyngten.min.js minified version

Use a script tag to directly add Islyngten to the global scope.

<script src="islyngten.min.js"></script>
<script>
  const i18n = new Islyngten();
  ...
</script>

Usage

const i18n = new Islyngten();

// Prepare i18n by adding translation resources for different languages.
// Note: The first parameter to `resources()` serves as a `context`. 
//       This allows you to structure your translation tables to your needs.
//       You are free to choose whatever string you like.
i18n.resources('myapp', 'de', {
  "Do you really want to delete the file {{filename}}?": 
    "Wollen Sie die Datei {{filename}} wirklich löschen?"
});

i18n.resources('myapp', 'fr', {
  "Do you really want to delete the file {{filename}}?": 
    "Voulez-vous vraiment supprimer le fichier {{filename}}?"
});

// Translation is not necessary for locale 'en', so original english text will be supplied.
var rb = i18n.resourceBundle('myapp', 'en');
var translation = rb._("Do you really want to delete the file {{filename}}?", {
  '{{filename}}': "test.txt"
});

// -> returns "Do you really want to delete the file test.txt?"

// German translation will be supplied for locale 'de'.
rb = i18n.resourceBundle('myapp', 'de');
translation = rb._("Do you really want to delete the file {{filename}}?", {
  '{{filename}}': "test.txt"
});

// -> returns "Wollen Sie die Datei test.txt wirklich löschen?"

// French translation will be supplied for locale 'fr'.
rb = i18n.resourceBundle('myapp', 'fr');
translation = rb._("Do you really want to delete the file {{filename}}?", {
  '{{filename}}': "test.txt"
});

// -> returns "Voulez-vous vraiment supprimer le fichier test.txt?"

Simple example

const i18n = new Islyngten();

// Prepare i18n by adding translation resources for different languages.
i18n.resources('animals', 'de', {
  "dog": "Hund",
  "cat": "Katze",
  "mouse": "Maus"
});

i18n.resources('animals', 'fr', {
  "dog": "chien",
  "cat": "chat",
  "mouse": "souris"
});

// To access the translations, get a resource bundle for the desired language ...
var rb = i18n.resourceBundle('animals', 'de');

// ... and request the text.
rb.get("dog"); // -> returns "Hund"
rb.t("dog");   // -> returns "Hund"
rb._("dog");   // -> returns "Hund"

// Note: t() and _() are aliases for the get() method.

// Select a different language.
var rbfr = i18n.resourceBundle('animals', 'fr');

rbfr._("dog");   // -> returns "chien"

// If no translation was found the original text is returned.
rbfr._("elephant"); // -> returns "elephant"

More examples

Simple plural

const i18n = new Islyngten();

i18n.resources('questions', 'de', {
  "Delete the selected file?": "Selektierte Datei entfernen?",
  "Delete the selected files?": "Selektierte Dateien entfernen?"
});

var rb = i18n.resourceBundle('questions', 'de');

// Note: tt() and __() are aliases for the nget() method.
var fileCount = 1;
var translation = rb.__("Delete the selected file?", "Delete the selected files?", fileCount);
// translation -> "Selektierte Datei entfernen?"

fileCount = 4;
translation = rb.__("Delete the selected file?", "Delete the selected files?", fileCount);
// translation -> "Selektierte Dateien entfernen?"

Simple plural with variables (interpolation)

const i18n = new Islyngten();

i18n.resources('dingdong', 'de', {
  "The list contains $count item": "Die Liste enthält $count Eintrag",
  "The list contains $count items": "Die Liste enthält $count Einträge"
});

var rb = i18n.resourceBundle('dingdong', 'de');

// Note: tt() and __() are aliases for the nget() method.
var count = 0;
var translation = rb.__("The list contains $count item", "The list contains $count items", count, {
  '$count': count
});
// translation -> "Die Liste enthält 0 Einträge"

count = 1;
translation = rb.__("The list contains $count item", "The list contains $count items", count, {
  '$count': count
});
// translation -> "Die Liste enthält 1 Eintrag"

count = 12;
translation = rb.__("The list contains $count item", "The list contains $count items", count, {
  '$count': count
});
// translation -> "Die Liste enthält 12 Einträge

Multiple plural forms

The previous examle showed an easy way to support simple plural forms by using the nget() [ __(), tt() ] methods. But what, if you need to translate in other languages where multiple plural forms exist? For example, in Polish, the word "file" pluralises like this:

• 1 plik
• 2,3,4 pliki
• 5-21 plików
• 22-24 pliki
• 25-31 plików

(More details here)

const i18n = new Islyngten();

i18n.resources('multi', 'pl', {
  "file": "plik",
  "files": {
    // Various forms of specifiying the range of numbers are supported.
    '2,3,4': "pliki",
    '5-21': "plików",
    '22-24': "pliki",
    '25-31': "plików"
  }
});

const rb = i18n.resourceBundle('multi', 'pl');

var translation = rb.__("file", "files", 1);
// translation -> "plik"

translation = rb.__("file", "files", 2);
// translation -> "pliki"

translation = rb.__("file", "files", 3);
// translation -> "pliki"

translation = rb.__("file", "files", 4);
// translation -> "pliki"

translation = rb.__("file", "files", 5);
// translation -> "plików"

translation = rb.__("file", "files", 6);
// translation -> "plików"

translation = rb.__("file", "files", 20);
// translation -> "plików"

translation = rb.__("file", "files", 23);
// translation -> "pliki"

translation = rb.__("file", "files", 30);
// translation -> "plików"

Interpolation

  const i18n = new Islyngten();

  i18n.resources('interpol', 'de', {
    "Height must be within {{arg0}} and {{arg1}} cm.": 
      "Höhe muss innerhalb von {{arg0}} und {{arg1}} cm liegen."
  });

  const rb = i18n.resourceBundle('interpol', 'de');

  // There are no specification on how to name your variables. Choose whatever format you like.

  const translation = rb._("Height must be within {{arg0}} and {{arg1}} cm.", {
      '{{arg0}}': "120",
      '{{arg1}}': "250"
    });
  // translation -> "Höhe muss innerhalb von 120 und 250 cm liegen."

Even more examples

Please refer to the test spec for more examples.

Testing

We use

• JSHint for static code analysis.
• Jasmine testing framework for testing.
• Karma test runner for testing in the browser.
• Istanbul test coverage framework for tracking test coverage.

Steps to be taken

• Clone or download the repository.
• Change into the project directory.
• Use npm install to install all development dependencies.
• Use npm runt lint to run static code analysis.
• Use npm test to run the tests.
• Use npm run coverage to track test coverage.
• The output should display successful execution results and a code coverage map.

Build

• Clone or download the repository.
• Change into project directory.
• Use npm run build in project directory to build islyngten.min.js from islyngten.js.

Contribution

Please use Github issues for requests.

Pull requests are welcome.

Issues

We use GitHub issues to track bugs. Please ensure your bug description is clear and has sufficient instructions to be able to reproduce the issue.

The absolute best way to report a bug is to submit a pull request including a new failing test which describes the bug. When the bug is fixed, your pull request can then be merged.

The next best way to report a bug is to provide a reduced test case on jsFiddle or jsBin or produce exact code inline in the issue which will reproduce the bug.

Support

• Send us an email: [email protected]
• Follow us on Twitter: @belexos

Changelog

v1.1.0

• Update npm modules.
• Update and extend test environment.
• Add static code analysis tool JSHint.
• Add Karma test runner.
• Fix JSHint issues.
• Replace uglify-js by terser for minification.
• Update README.

v1.0.3

• Update npm modules.

v1.0.2

• Update npm modules.

v1.0.1

• Update npm modules.

v1.0.0

• Initial public release

License

Copyright (c) 2013-present, Belexos. Islyngten is licensed under the MIT License.