If you need more info, help, or want to provide general feedback on Lyra, join the Lyra Slack channel
You can install Lyra using npm, yarn, pnpm:
npm i @lyrasearch/lyrayarn add @lyrasearch/lyrapnpm add @lyrasearch/lyraOr import it directly in a browser module:
<html>
<body>
<script type="module">
import { create, search, insert } from "https://unpkg.com/@lyrasearch/lyra@latest/dist/esm/src/lyra.js";
// ...
</script>
</body>
</html>See builds for details about the various builds packaged with Lyra.
Lyra is quite simple to use. The first thing to do is to create a new database instance and set an indexing schema:
import { create, insert, remove, search } from "@lyrasearch/lyra";
const db = create({
schema: {
author: "string",
quote: "string",
},
});Lyra will only index string properties, but will allow you to set and store additional data if needed.
Once the db instance is created, you can start adding some documents:
insert(db, {
quote:
"It is during our darkest moments that we must focus to see the light.",
author: "Aristotle",
});
insert(db, {
quote:
"If you really look closely, most overnight successes took a long time.",
author: "Steve Jobs",
});
insert(db, {
quote:
"If you are not willing to risk the usual, you will have to settle for the ordinary.",
author: "Jim Rohn",
});
insert(db, {
quote: "You miss 100% of the shots you don't take",
author: "Wayne Gretzky - Michael Scott",
});Please note that the insert function is synchronous. If you have a large
number of documents, we highly recommend using the insertBatch function
instead, which prevents the event loop from blocking. This operation is
asynchronous and returns a promise:
await insertBatch(db, [
{
quote:
"It is during our darkest moments that we must focus to see the light.",
author: "Aristotle",
},
{
quote:
"If you really look closely, most overnight successes took a long time.",
author: "Steve Jobs",
},
{
quote:
"If you are not willing to risk the usual, you will have to settle for the ordinary.",
author: "Jim Rohn",
},
{
quote: "You miss 100% of the shots you don't take",
author: "Wayne Gretzky - Michael Scott",
},
]);After the data has been inserted, you can finally start to query the database.
const searchResult = search(db, {
term: "if",
properties: "*",
});In the case above, you will be searching for all the documents containing the
word if, looking up in every schema property (AKA index):
{
elapsed: 99, // elapsed time is in microseconds
hits: [
{
id: 'ckAOPGTA5qLXx0MgNr1Zy',
quote: 'If you really look closely, most overnight successes took a long time.',
author: 'Steve Jobs'
},
{
id: 'fyl-_1veP78IO-wszP86Z',
quote: 'If you are not willing to risk the usual, you will have to settle for the ordinary.',
author: 'Jim Rohn'
}
],
count: 2
}You can also restrict the lookup to a specific property:
const searchResult = search(db, {
term: "Michael",
properties: ["author"],
});Result:
{
elapsed: 111,
hits: [
{
id: 'L1tpqQxc0c2djrSN2a6TJ',
quote: "You miss 100% of the shots you don't take",
author: 'Wayne Gretzky - Michael Scott'
}
],
count: 1
}If needed, you can also delete a given document by using the remove method:
remove(db, "L1tpqQxc0c2djrSN2a6TJ");Lyra supports multiple languages. By default, it will use the english
language,
You can specify a different language by using the defaultLanguage property
during Lyra initialization.
By default, Lyra will analyze your input using an English
Porter Stemmer function.
You can replace the default stemmer with the a custom one, or a pre-built one
shipped with the default Lyra installation.
Example using ESM (see builds below):
import { create } from "@lyrasearch/lyra";
import { stemmer } from "@lyrasearch/lyra/dist/esm/stemmer/lib/it";
const db = create({
schema: {
author: "string",
quote: "string",
},
defaultLanguage: "italian",
tokenizer: {
stemmingFn: stemmer,
},
});Example using CJS (see builds below):
const { create } = require("@lyrasearch/lyra");
const { stemmer } = require("@lyrasearch/lyra/dist/cjs/stemmer/lib/it");
const db = create({
schema: {
author: "string",
quote: "string",
},
defaultLanguage: "italian",
tokenizer: {
stemmingFn: stemmer,
},
});Right now, Lyra supports 23 languages and stemmers out of the box:
- Armenian
- Arabic
- Danish
- Spanish
- English
- Finnish
- French
- German
- Greek
- Hindi
- Hungarian
- Indonesian
- Italian
- Irish
- Dutch
- Nepali
- Norwegian
- Portuguese
- Romanian
- Russian
- Serbian
- Swedish
- Turkish
Lyra is packaged with ES modules, CommonJS, and generic browser builds.
In most cases, simply import or require @lyrasearch/lyra and your
environment will choose the most appropriate build ✨. In some circumstances,
you may need to import or require certain files (such as stemmers). The
following builds are included in the Lyra package:
| path | build |
|---|---|
dist/esm |
ESNext build using ES modules. Use this for most modern applications (node.js, vite.js, browser modules, etc.) |
dist/cjs |
ESNext build using CommonJS (require). Use this for environments that don't support ES modules. |
dist/browser |
ES2019 build using CommonJS (require). Use this for environment that don't support modern ESNext language constructs, such as webpack 4 (used by Expo). Note, this build will be chosen by default in webpack environments such as Next.js. |
When dealing with asynchronous operations, hooks are an excelent mechanism to
intercept and perform operations during the workflow. Lyra supports hooks
natively. The create function allows you to specific a sequence of hooks.
import { create } from "@lyrasearch/lyra";
const db = create({
schema: {},
hooks: {
// HERE
},
});Important: The hooks run in the same context as the main function execution. It means, that if your hook takes X milliseconds to resolve, the Lyra function will take X + Y (where Y = Lyra operation).
The afterInsert hook is called after the insertion of a document into the
database. The hook will be called with the id of the inserted document.
Example:
import { create, insertWithHooks } from "@lyrasearch/lyra";
async function hook1 (id: string): Promise<void> {
// called before hook2
}
function hook2 (id: string): void {
// ...
}
const db = create({
schema: {
author: "string",
quote: "string",
},
hooks: {
afterInsert: [hook1, hook2],
},
});
await insertWithHooks(db, { author: "test", quote: "test" })Lyra is licensed under the Apache 2.0 license.