# Theme Config: Algolia Search The `themeConfig.algolia` option allows you to use [Algolia DocSearch](https://docsearch.algolia.com/). To enable it, you need to provide at least apiKey and indexName: ```js module.exports = { themeConfig: { algolia: { apiKey: 'your_api_key', indexName: 'index_name' } } } ``` For more options, check out [Algolia DocSearch's documentation](https://docsearch.algolia.com/docs/behavior). You can pass any extra option alongside other options, e.g. passing `searchParameters`: ```js module.exports = { themeConfig: { algolia: { apiKey: 'your_api_key', indexName: 'index_name', searchParameters: { facetFilters: ['tags:guide,api'] } } } } ``` ## Internationalization (i18n) If you have multiple locales in your documentation and you have defined a `locales` object in your `themeConfig`: ```js module.exports = { themeConfig: { locales: { // ... }, algolia: { apiKey: 'your_api_key', indexName: 'index_name' } } } ``` VitePress will automatically add a `language` _facetFilter_ to the `searchParams.facetFilter` array with the correct language value. **Make sure to properly configure your DocSearch config as well** by adding `language` as a _custom attribute for faceting_ and by setting it based on the `lang` attribute of the `` element. Here is a short example of DocSearch config: ```json { "index_name": "", "start_urls": [ { "url": "" } ], "stop_urls": ["(?:(? .sidebar-links > .sidebar-link .sidebar-link-item.active", "global": true, "default_value": "Documentation" }, "lvl1": ".content h1", "lvl2": ".content h2", "lvl3": ".content h3", "lvl4": ".content h4", "lvl5": ".content h5", "lvl6": ".content p, .content li", "text": ".content [class^=language-]", "language": { "selector": "/html/@lang", "type": "xpath", "global": true, "default_value": "en-US" } }, "custom_settings": { "attributesForFaceting": ["language"] } } ``` You can take a look at the [DocSearch config used by Vue Router](https://github.com/algolia/docsearch-configs/blob/master/configs/next_router_vuejs.json) for a complete example.