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HuggingFace Transformers

The TransformerEmbeddings class uses the Transformers.js package to generate embeddings for a given text.

It runs locally and even works directly in the browser, allowing you to create web apps with built-in embeddings.


You'll need to install the @xenova/transformers package as a peer dependency:

npm install @xenova/transformers
npm install @langchain/community


Note that if you're using in a browser context, you'll likely want to put all inference-related code in a web worker to avoid blocking the main thread.

See this guide and the other resources in the Transformers.js docs for an idea of how to set up your project.

import { HuggingFaceTransformersEmbeddings } from "@langchain/community/embeddings/hf_transformers";

const model = new HuggingFaceTransformersEmbeddings({
model: "Xenova/all-MiniLM-L6-v2",

/* Embed queries */
const res = await model.embedQuery(
"What would be a good company name for a company that makes colorful socks?"
console.log({ res });
/* Embed documents */
const documentRes = await model.embedDocuments(["Hello world", "Bye bye"]);
console.log({ documentRes });

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