> ## Documentation Index
> Fetch the complete documentation index at: https://nvd-54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# EPUB files - 集成

> 使用 LangChain JavaScript 集成 EPUB files - document loader。

This example goes over how to load data from EPUB files. By default, one document will be created for each chapter in the EPUB file, you can change this behavior by setting the `splitChapters` option to `false`.

# Setup

```bash npm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
npm install @langchain/community @langchain/core epub2 html-to-text
```

# Usage, one document per chapter

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { EPubLoader } from "@langchain/community/document_loaders/fs/epub";

const loader = new EPubLoader("src/document_loaders/example_data/example.epub");

const docs = await loader.load();
```

# Usage, one document per file

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { EPubLoader } from "@langchain/community/document_loaders/fs/epub";

const loader = new EPubLoader(
  "src/document_loaders/example_data/example.epub",
  {
    splitChapters: false,
  }
);

const docs = await loader.load();
```

***

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