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i18n-dialect

v1.1.1

Published

Internationalization support library

Downloads

406

Readme

i18n-dialect

dialect is a library to support runtime i18n functions.

Usage

dialect exports a controller class called TranslationController, which should be instantiated in your application. Controller's constructor has following configurational parameters:

  • translationGetter: a used-defined function to receive translated content as JSON file. Library does not know about any ways your application can use to receive these files, for example, it might be a simple require when running on server side, or asynchronous file load with fetch or other asynchronous request library.
  • onFailedSubstitution: a callback, which will be called every time any %N substitution is failed; may be undefined.
  • defaultPluralSelect: a function that will be a default for plural forms selection. This should be a plural selector of developers' primary language.

The TranslationController object also has a setLocale method to update internal dictionary - once this is done, the changes are applied to all subsequent calls of translation functions. Notice that setLocale method is asynchronous, so updating your user interface should not be done right after it's call: you should wait until everything is loaded and parsed.

Function interface

dialect exports four simple translation functions:

  • _tGen for simple translations
  • _ptGen for contextual translations
  • _ntGen for plural translations
  • _nptGen for contextual plural translations

These functions are function generators (higher order functions), and before using them in your project you should parameterize them with TranslationController instance, like this:

import { TranslationController, _tGen, _ptGen, _ntGen, _nptGen } from 'i18n-dialect';

let controller = new TranslationController(...);

export const _t = _tGen(controller);
export const _pt = _ptGen(controller);
export const _nt = _ntGen(controller);
export const _npt = _nptGen(controller);

In some other file:

import { _t, _pt, _nt, _npt } from '...';

// now you can use _t, _pt, etc.

Make sure that names of your created functions are strictly equal to _t, _nt, _pt and _npt, and you use these functions with these names only in your code; otherwise your translations will not be parsed successfully with i18n-stex parser.

Object interface

dialect also exports a single class called TranslationProvider, which simplifies interaction with library for a bit. You should instantiate it once and then just pass it into your other files and components. Example:

import { TranslationController, TranslationProvider } from 'i18n-dialect';

let controller = new TranslationController(...);
export const i18n = new TranslationProvider(controller);

In some other file:

import { i18n } from '...';

// now you can use i18n._t, i18n._pt, etc.

Contributing

i18n-dialect uses github-flow to accept & merge fixes and improvements. Basic process is:

  • Fork the repo.
  • Create a branch.
  • Add or fix some code.
  • Run Karma testing suite with npm run test and make sure nothing is broken
  • Add some tests for your new code or fix broken tests.
  • Run npm run build to build pure-js distribution files.
  • Commit & push.
  • Create a new pull request to original repo.

Pull requests with failing tests will not be accepted. Also, if you add or modify packages to package.json, make sure you use yarn and update yarn.lock.