svelte-algolia-instantsearch

This library is a community developed wrapper around instantsearch.js for Svelte.

It is not affiliated nor backed by Algolia.

It is meant to be an equivalent of react-instantsearch-hooks-web for Svelte, exposing a similar API.

[!IMPORTANT] This library only works with SvelteKit. It is now the default when you bootstrap a Svelte project.

Installation

yarn add svelte-algolia-instantsearch algoliasearch
# or
npm install svelte-algolia-instantsearch algoliasearch

Basic usage

<script>
  import {
    InstantSearch,
    SearchBox,
    Hits,
    Pagination,
    HitsPerPage,
  } from "svelte-algolia-instantsearch";
  import algoliasearch from "algoliasearch/lite";

  const searchClient = algoliasearch("<YOUR_API_KEY>", "<YOUR_SEARCH_KEY>");
</script>

<InstantSearch indexName="<YOUR_INDEX_NAME>" routing {searchClient}>
  <SearchBox />

  <Hits let:hit>
    <img src={hit.author_image_url} alt={hit.author_name} />
    {hit.post_title} by {hit.author_name}
  </Hits>

  <div style="display:flex;">
    <Pagination />
    <HitsPerPage
      items={[
        { value: 5, label: "Show 5 hits", default: true },
        { value: 10, label: "Show 10 hits" },
      ]}
    />
  </div>
</InstantSearch>

Compatibility with SvelteKit SSR

Warning If you are using pnpm as a package manager, please check this issue if you have an error while running your dev script

If you want your page to be fully rendered on the server, which is great for SEO, simply add a +page.server.js file next to your +page.svelte file, which should contain the following lines :

import { getServerState } from "svelte-algolia-instantsearch";

import Page from "./+page.svelte";

export const load = ({ url }) => getServerState(Page, url);

Now you can check in your network tab that the page containing hits and facets is fully rendered on the server 😁

API

connect

The most important part of this library is the connect function, which creates and adds a widget to the InstantSearch instance, and returns a Svelte readable store.

Here's an example of how you can use it to build your own components :

<script>
  import { connect } from "svelte-algolia-instantsearch";
  import { connectStats } from "instantsearch.js/es/connectors";

  const state = connect(connectStats);
  $: ({ nbHits, processingTimeMS } = $state);
</script>

<p>Found {nbHits} results in {processingTimeMS}ms</p>

Components

It's still a work in progress, but you can use some pre-made components to build your search UI :

• Breadcrumb
• Configure
• ClearRefinements
• CurrentRefinements
• DynamicWidgets
• HierarchicalMenu
• Highlight
• Hits
• HitsPerPage
• Index
• InfiniteHits
• Menu
• Pagination
• PoweredBy
• RangeInput
• RefinementList
• SearchBox
• Snippet
• SortBy
• Stats
• ToggleRefinement

getInstantSearchContext

This function returns the instance of InstantSearch that was instantiated by the <InstantSearch> component.

It can be useful if you want to use the instantsearch.js API directly, for example to add a custom middleware.

<script>
  import { getInstantSearchContext } from "$lib";
  import { createInsightsMiddleware } from "instantsearch.js/es/middlewares";
  import { onMount } from "svelte";

  const search = getInstantSearchContext();

  onMount(() => {
    const insightsMiddleware = createInsightsMiddleware({
      /* ... */
    });
    search.use(insightsMiddleware);
    return () => {
      search.unuse(insightsMiddleware);
    };
  });
</script>