vue-i18next

Internationalization for vue using the i18next i18n ecosystem.

Installation

Source can be loaded via

# npm package
$ npm install @panter/vue-i18next

• If you don't use a module loader it will be added to window.VueI18next

Requirements

• vue >= 2.0.0
• i18next >= 6.0.1

Usage

Check the DEMO to see vue-i18next in action.

Init

import Vue from 'vue';
import i18next from 'i18next';
import VueI18Next from '@panter/vue-i18next';

Vue.use(VueI18Next);

i18next.init({
  lng: 'de',
  resources: {
    ...
  }
});

const i18n = new VueI18Next(i18next);
new Vue({
  ...
  i18n: i18n,
});

Init direct in Browser

<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/i18next@8.0.0/i18next.js"></script>
<script src="vue-i18next.js"></script>

i18next.init({
  lng: "en",
  resources: {
    en: { translation: locales.en },
    de: { translation: locales.de }
  }
});

const i18n = new VueI18next(i18next);

new Vue({
  i18n
}).$mount("#app");

$t

The $t function is a wrapper for i18next.t.

Check i18next documentation for more informations.

const locales = {
  en: {
    loadbundle: 'Load bundle language: {{lang}}',
  }
};

i18next.init({
  lng: 'en',
  resources: {
    en: { translation: locales.en },
  },
});

const i18n = new VueI18next(i18next);

Vue.component('app', {
  template: `
    <div>
      <strong>{{$t("loadbundle", {lang: this.lang}) }}</strong>
    </div>`,
  data() {
    return {
      lang: 'DE',
    };
});

find i18n in the context

Vue.component("language-changer", {
  template: "<div><a v-on:click=\"changeLanguage('de')\">DE</a></div>",
  methods: {
    changeLanguage(lang) {
      this.$i18n.i18next.changeLanguage(lang);
    }
  }
});

Change Language

import i18next from 'i18next';

...

i18next.changeLanguage('it');

Component interpolation

const locales = {
  en: {
    tos: "Term of Service",
    term: "I accept {{0}}. {{1}}.",
    promise: "I promise"
  }
};

i18next.init({
  lng: "en",
  resources: {
    en: { translation: locales.en }
  }
});

const i18n = new VueI18next(i18next);

Vue.component("app", {
  template: `
    <div>
      <i18next path="term" tag="label">
        <a href="#" target="_blank">{{ $t("tos") }}</a>
        <strong>{{ $t("promise") }}</strong>
      </i18next>
    </div>`
});

Directive

Full Featured properties:

• path: string
• language: language, optional
• args: object

const locales = {
  en: {
    hello: "Hello",
    helloWithName: "Hello {{name}}"
  }
};

i18next.init({
  lng: "en",
  resources: {
    en: { translation: locales.en }
  }
});

const i18n = new VueI18next(i18next);

// simple usage
Vue.component("app", {
  template: `<p v-t="hello"></p>`
});

// full featured
Vue.component("app", {
  template: `<p ref="text" v-t="{ path: 'helloWithName', language: 'en', args: { name: 'Hans' } }"></p>`
});

i18nOptions

The namespace will be loaded with (loadNamespaces)[http://i18next.com/docs/api/#load-namespaces],so one can lazy load namespaces for components.

const locales = {
  en: {
    tos: "Term of Service",
    term: "I accept {{0}}. {{1}}.",
    promise: "I promise"
  }
};

i18next.init({
  lng: "en",
  fallbackLng: "en",
  resources: {
    en: { common: locales.en }
  }
});

const i18n = new VueI18next(i18next);

Vue.component("app", {
  i18nOptions: { namespaces: "common" },
  template: `
    <div>
      <i18next path="term" tag="label">
        <a href="#" target="_blank">{{ $t("tos") }}</a>
        <strong>{{ $t("promise") }}</strong>
      </i18next>
    </div>`
});

There is also the possibility to prefix what key the component is using.

const locales = {
  en: {
    message: {
      hello: "Hello"
    },
  }
};

i18next.init({
  ...
});

const i18n = new VueI18next(i18next);

Vue.component('app', {
  i18nOptions: { keyPrefix: 'message'},
  template: `
    <div>
      <strong>{{ $t("hello") }}</strong>
    </div>`,
});

Translations can not only be defined in translation files but also in the i18nOptions.

i18next.init({
  ...
});

const i18n = new VueI18next(i18next);

Vue.component('app', {
  i18nOptions: {
    messages: {
      de: {
        hello: 'Hello!'
      }
    }
  },
  template: `
    <div>
      <strong>{{ $t("hello") }}</strong>
    </div>`,
});

Single file components

by @kazupon

<i18n>
  {
    "en": {
      "hello": "hello world!"
    }
  }
</i18n>

<template>
  <div id="app">
    <p>message: {{ $t('hello') }}</p>
  </div>
</template>

<script>
  export default {
    name: 'app',
  }
</script>

To be able to use the <i18> you need to use the vue-loader:

npm install @kazupon/vue-i18n-loader --save-dev

module.exports = {
  // ...
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          loaders: {
            // you need to specify `i18n` loaders key with `vue-i18n-loader` (https://github.com/kazupon/vue-i18n-loader)
            i18n: '@kazupon/vue-i18n-loader'
          }
        }
      },
      // ...
    ]
  },
  // ...
}

Use it with YAML:

npm install yaml-loader --save-dev

<i18n>

en:
  hello: "hello world!"

</i18n>

module.exports = {
  // ...
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: "vue-loader",
        options: {
          preLoaders: {
            i18n: "yaml-loader"
          },
          loaders: {
            i18n: "@kazupon/vue-i18n-loader"
          }
        }
      }
      // ...
    ]
  }
  // ...
};

Use Vue.Filter to deal with empty keys

by: @Fohlen

Vue.filter("t", value => {
  if (!value) return "";
  return i18n.t(value);
});

Usage:

{{ $t('some_text') }}
{{ 'some text' | t }}

Build Setup

# install dependencies
yarn install

# serve with hot reload at localhost:8080
yarn run dev

# build for production with minification
yarn run build

GitHub