Sveltekit Translate

An i18n library designed to be easy to use. It's all still very basic, so if it is lacking certain features, feel free to add some PRs.

The syntax for normal usage is nice and compact. The settings and translations are contained in the context of the <Translate /> component. Translating strings can be done with either a component or a function.

The <Tx /> component

The <Tx /> component takes either a html or a text property to locate the string. Optionally a params property can be given for interpolation. For example <Tx text="title" />, or <Tx html="page.header.subtitle" params={someObject} />. The former shows text, the latter parses HTML (without sanitizing).

Note that attributes (e.g. alt texts) cannot be translated with this method.

Translations from functions

If you want to translate attributes, or just prefer using functions, you can also use the $t(path: string, params?: any) function. Note that the params parameter is optional.

The same examples as above can be achieved by doing this: { $t('title') }; and {@html $t('page.header.subtitle') }.

HTML Sanitization

From version 1, I've removed html sanitization as it is becoming harder to support it. I might build it back at some point if there's enough questions for it.

Features

• 🛩️ Use any JSON file or JS object as input
• 🛰️ Supports unlimited languages
• 🛺 Interpolate parameters
• 🐒 Fallback to the default language for missing values in the current language
• 🚀 Svelte Stores are used a lot (Everything is reactive)
• 🦄 Typescript native

Install

npm i -D sveltekit-translate

Live demo

Demo

Sample Code

Sample code for all the basic features can be found here.

Basic Example

In your +layout.svelte create the setup:

<script lang="ts">
	import Translate from 'sveltekit-translate/translate/Translate.svelte';
	import type { TranslateOptions } from 'sveltekit-translate/translate/translateStore';

	let opts: TranslateOptions = {
		defaultLang: 'en', //Set your default (or fallback) language
		currentLang: 'nl' //Set your current language
	};

	//Initial translation data. This could of course be fetched from somewhhere.
	//The library doesn't care how you get the translations.
	let data = {
		en: { title: 'Hello { name }', greeting: 'You are <b>the best!</b>' },
		nl: { title: 'Hoi { name }', greeting: 'Jij bent een <b>toppertje!</b>' },
		es: { title: 'Hola { name }', greeting: 'Eres <b>asombrosa!</b>' }
	};
</script>

<Translate {opts} {data}>
	<slot />
</Translate>

Now you can translate anything in your app by using the <Tx /> component:

<script lang="ts">
	import Tx from 'sveltekit-translate/translate/tx.svelte';

	let name = 'world';
</script>

<div class="my-2">
	<label>
		name
		<input type="text" bind:value="{name}" class="py-2 px-4 ml-2 border rounded" />
	</label>
</div>

<h1 class=" mt-4 mb-2 font-bold text-2xl">
	<Tx text="title" params="{{" name }} />
</h1>
<p>
	<Tx html="greeting" />
</p>

The <Translate /> component creates a context called svelte-translate that contains a SvelteTranslate interface:

const {
    options, // Writable store with the basic options
    translations, //Readible store with the translations object of the current language.
    defaultTranslations // Readible store with the translations object of the default language.
    allLanguages, // Readible string array of all languages we have translations for
    allTranslations, // Writable store containing all of the translations. Also container a convenience method `setLang()` to set or update an existing language.
  } = getContext<SvelteTranslate>(CONTEXT_KEY);

Example for language buttons:

<script lang="ts">
  import { getContext } from 'svelte';
  import { CONTEXT_KEY, type SvelteTranslate } from 'sveltekit-translate/translate/translateStore';

  let { allLanguages, options } = getContext<SvelteTranslate>(CONTEXT_KEY);
</script>

{#each $allLanguages as lang}
  <button
    class="btn px-4 py-2 mr-2 border rounded"
    class:active={$options.currentLang === lang}
    on:click={() => ($options.currentLang = lang)}>{lang}</button
  >
{/each}

<style>
  .btn {
    min-width: 5rem;
  }

  .active {
    @apply bg-sky-400;
  }
</style>

Contributing

Feel free to send PRs or create issues.