Localization

Demo

Demo Page / Demo Component

i18n General Documentation

For more information about i18n, you can read this article and the official Aurelia documentation

Installation

Install the aurelia-i18n library with a backend loader, typically i18next-xhr-backend

Install NPM package

npm install aurelia-i18n i18next-xhr-backend

Aurelia-CLI

For the Aurelia-CLI, you will also need to add the following to your aurelia.json file

{
  "name": "i18next",
  "path": "../node_modules/i18next/dist/umd",
  "main": "i18next"
},
{
  "name": "aurelia-i18n",
  "path": "../node_modules/aurelia-i18n/dist/amd",
  "main": "aurelia-i18n"
},
{
  "name": "i18next-xhr-backend",
  "path": "../node_modules/i18next-xhr-backend/dist/umd",
  "main": "i18nextXHRBackend"
},

Main.ts

configure i18n loader with assets folder

import { I18N, TCustomAttribute } from 'aurelia-i18n';
import * as Backend from 'i18next-xhr-backend'; // WebPack
// import Backend from 'i18next-xhr-backend'; // CLI

export function configure(aurelia: Aurelia) {
  aurelia.use.standardConfiguration();

  // PLATFORM.moduleName is not required when using Aurelia-CLI
  aurelia.use.plugin(PLATFORM.moduleName('aurelia-slickgrid'));

  // aurelia i18n to handle multiple locales
  aurelia.use.plugin(PLATFORM.moduleName('aurelia-i18n'), (instance) => {
    // register backend plugin
    instance.i18next.use(Backend);

    return instance.setup({
      backend: {
        loadPath: './assets/i18n/{{lng}}/{{ns}}.json',
      },
      lng: 'en',
      ns: ['aurelia-slickgrid'],
      defaultNS: 'aurelia-slickgrid',
      attributes: ['t', 'i18n'],
      fallbackLng: 'en',
      debug: false
    });
  });
}

Class sample

You need to add a translation key via the property headerKey to each column definition, for example: headerKey: 'TITLE'

Note

For the Select Filter, you will use labelKey instead of label. Anytime a translation key will come in play, we will add the word key to the end (hence headerKey, labelKey, more to come...)

import { autoinject } from 'aurelia-framework';
import { I18N } from 'aurelia-i18n';
import { Formatters } from 'aurelia-slickgrid';

@autoinject()
export class Example {
  gridOptions: GridOption;
  columnDefinitions: Column[];
  dataset: any[];

  constructor(private i18n: I18N) {
    // define the grid options & columns and then create the grid itself
    this.defineGrid();
  }

  // Define grid Options and Columns
  // provide a headerKey for each column and enableTranslate to True in GridOption
  defineGrid() {
    this.columnDefinitions = [
      { id: 'title', name: 'Title', field: 'title', headerKey: 'TITLE', formatter: this.taskTranslateFormatter, sortable: true, minWidth: 100 },
      { id: 'duration', name: 'Duration (days)', field: 'duration', headerKey: 'DURATION', sortable: true, minWidth: 100 },
      { id: 'start', name: 'Start', field: 'start', headerKey: 'START', formatter: Formatters.dateIso, minWidth: 100 },
      { id: 'finish', name: 'Finish', field: 'finish', headerKey: 'FINISH', formatter: Formatters.dateIso, minWidth: 100 },
      { id: 'completed', name: 'Completed', field: 'completed', headerKey: 'COMPLETED', formatter: Formatters.translate, params: { i18n: this.i18n }, sortable: true, minWidth: 100 }
      // OR via your own custom translate formatter
      // { id: 'completed', name: 'Completed', field: 'completed', headerKey: 'COMPLETED', formatter: translateFormatter, sortable: true, minWidth: 100 }
    ];
    this.gridOptions = {
      autoResize: {
        containerId: 'demo-container',
        sidePadding: 15
      },
      enableAutoResize: true,
      enableTranslate: true
    };
  }
}

  // create a custom translate Formatter
  taskTranslateFormatter: Formatter = (row, cell, value, columnDef, dataContext) => {
    return this.i18n.tr('TASK_X', { x: value });
  }

Custom Formatter (cell values)

You can define your own custom Formatter by providing the i18n Service into the Formatter and using the .tr() function to translate the cell value.

taskTranslateFormatter: Formatter = (row, cell, value, columnDef, dataContext) => {
    return this.i18n.tr('TASK_X', { x: value });
}

Using Aurelia-Slickgrid Formatters.Translate

Instead of defining a custom formatter over and over, you could also use the built-in Aurelia-Slickgrid Formatters.translate. However for the formatter to work, you need to provide the i18n Service instance, you can do so using the params properties which is made to pass any type of data, however you need to pass it with this structure: params: { i18n: this.i18n } .

this.columnDefinitions = [
      { 
        id: 'title', 
        name: 'Title', 
        field: 'title', 
        headerKey: 'TITLE', 
        formatter: Formatters.translate, 
        params: { i18n: this.i18n } // provide the `i18n instance through the params.i18n property
      }
    ];

Locales

The final step is of course the actual translations. There's multiple ways to copy them to your assets folder. See below for a few ways:

1. Manually copy the translation keys/values
2. Manually copy the JSON files to your assets folder
3. For Aurelia-CLI, you can modify aurelia.json file to copy the JSON files to your assets folder via a copy scripts.
   • You can implement something like the following (I did not test this one, please report back if this is not accurate)

"copyFiles": {
  "node_modules/aurelia-slickgrid/i18n/*.json": "assets"
}

3. Or modify your package.json and add a script to copy the JSON files to your assets folder
   • install NPM packages cross-env and copyfiles (npm install copy-files cross-env)
   • add a new script in your package.json
   • run the below script once with npm run copy:i18n and you should now have the JSON files in your src/assets folder

"copy:i18n": "cross-env copyfiles -f node_modules/aurelia-slickgrid/i18n/*.json assets/i18n"

If you want to manually re-create the translation in your own files, the list of translations that you will need are displayed in the asset i18n translation folder (from that file, you need all translations shown before the 'BILLING', the next few ones are for the demo page only).