Introduce preprocess config prop

.github/workflows/tests.yml

@@ -1,13 +1,16 @@
 name: Tests
 
-on: [push, workflow_dispatch]
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [synchronize]
 
 jobs:
   Tests:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [16]
+        node-version: [18]
         os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:

README.md

@@ -82,10 +82,9 @@ const config = ({
 export const { t, locale, locales, loading, loadTranslations } = new i18n(config);
 ```
 
-...load your translations in `__layout.svelte`...
+...load your translations in `+layout.js`...
 
-```svelte
-<script context="module">
+```js
   import { locale, loadTranslations } from '$lib/translations';
 
   export const load = async ({ url }) => {
@@ -99,7 +98,6 @@ export const { t, locale, locales, loading, loadTranslations } = new i18n(config
 
     return {};
   }
-</script>
 ```
 
 ...and include your translations within pages and components.

docs/README.md

@@ -5,13 +5,11 @@
 
 
 ## Config
-### `parser`: __[Parser.T](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts#L97-L99)__
-This property defines translation syntax you want to use. For more, see [Parsers](https://github.com/sveltekit-i18n/parsers#readme).
 
-### `translations`?: __[Translations.T](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts#L127)__
+### `translations`?: __[Translations.T](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts)__
 This property defines translations, which should be in place before `loaders` will trigger. It's useful for synchronous translations (e.g. locally defined language names which are same for all language mutations).
 
-### `loaders`?: __[Loader.LoaderModule[]](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts#L69-L74)__
+### `loaders`?: __[Loader.LoaderModule[]](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts)__
 You can use `loaders` to define your asyncronous translation load. All loaded data are stored so loader is triggered only once – in case there is no previous version of the translation. It can get refreshed according to `config.cache`.\
 Each loader can include:
 
@@ -23,6 +21,38 @@ Each loader can include:
 
 `routes`?: __Array<string | RegExp>__ – can define routes this loader should be triggered for. You can use Regular expressions too. For example `[/\/.ome/]` will be triggered for `/home` and `/rome` route as well (but still only once). Leave this `undefined` in case you want to load this module with any route (useful for common translations).
 
+### `preprocess`?: __'full' | 'preserveArrays' | 'none' | (input: Translations.Input) => any__
+Defines a preprocess strategy or a custom preprocess function. Preprocessor runs immediately after the translation data load. This is set to `'full'` by default.
+
+Examples for input:
+```json
+{"a": {"b": [{"c": {"d": 1}}, {"c": {"d": 2}}]}}
+```
+
+`'full'` (default) setting will result in:
+```json
+{"a.b.0.c.d": 1, "a.b.1.c.d": 2}
+```
+
+`'preserveArrays'` in:
+```json
+{"a.b": [{"c.d": 1}, {"c.d": 2}]}
+```
+
+`'none'` (nothing's changed):
+```json
+{"a": {"b": [{"c": {"d": 1}}, {"c": {"d": 2}}]}}
+```
+
+Custom preprocess function `(input) => JSON.parse(JSON.stringify(input).replace('1', '"🦄"'))` will output:
+
+```json
+{"a": {"b": [{"c": {"d": "🦄"}}, {"c": {"d": 2}}]}}
+```
+
+### `parser`: __[Parser.T](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts)__
+This property defines translation syntax you want to use. For more, see [Parsers](https://github.com/sveltekit-i18n/parsers#readme).
+
 ### `initLocale`?: __string__
 If you set this property, translations will be initialized immediately using this locale.
 
@@ -45,7 +75,7 @@ You can manage log level using this property (default: `'warn'`).
 ### `log.prefix`?: __string__
 You can prefix output logs using this property (default: `'[i18n]: '`).
 
-### `log.logger`?: __[Logger.T](https://github.com/sveltekit-i18n/base/blob/b488f34b2c160b62943968929c9e6e1ee642c5e8/src/types.ts#L20-L22)__
+### `log.logger`?: __[Logger.T](https://github.com/sveltekit-i18n/base/blob/master/src/types.ts)__
 You can setup your custom logger using this property (default: `console`).
 
 ## Instance methods and properties

jest.config.js

@@ -1,5 +1,5 @@
-/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+/** @type {import('ts-jest').JestConfigWithTsJest} */
 export default ({
-  preset: 'ts-jest',
+  preset: 'ts-jest/presets/default-esm',
   testEnvironment: 'node',
 });