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

# TextLoader 集成

> 使用 LangChain JavaScript 集成 TextLoader 文档加载器。

<Tip>
  **兼容性**：仅适用于 Node.js 环境。
</Tip>

本笔记本提供了快速入门 `TextLoader` [文档加载器](/oss/javascript/integrations/document_loaders) 的简要概述。如需了解 `TextLoader` 所有功能和配置的详细文档，请参阅 [API 参考](https://reference.langchain.com/javascript/langchain-core/document_loaders/base/BaseDocumentLoader)。

## 概述

### 集成详情

| 类                                                                                                                  | 包                                                    |    兼容性    | 本地支持 | Python 支持 |
| :----------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------- | :-------: | :--: | :-------: |
| [`TextLoader`](https://reference.langchain.com/javascript/langchain-core/document_loaders/base/BaseDocumentLoader) | [langchain](https://www.npmjs.com/package/langchain) | 仅 Node.js |   ✅  |     ❌     |

## 设置

要使用 `TextLoader` 文档加载器，您需要安装 `langchain` 包。

### 安装

LangChain TextLoader 集成位于 `langchain` 包中：

<CodeGroup>
  ```bash npm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  npm install langchain
  ```

  ```bash yarn theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  yarn add langchain
  ```

  ```bash pnpm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  pnpm add langchain
  ```
</CodeGroup>

## 实例化

现在我们可以实例化模型对象并加载文档：

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { TextLoader } from "@langchain/classic/document_loaders/fs/text"

const loader = new TextLoader("../../../../../../examples/src/document_loaders/example_data/example.txt")
```

## 加载

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const docs = await loader.load()
docs[0]
```

```javascript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
Document {
  pageContent: 'Foo\nBar\nBaz\n\n',
  metadata: {
    source: '../../../../../../examples/src/document_loaders/example_data/example.txt'
  },
  id: undefined
}
```

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
console.log(docs[0].metadata)
```

```javascript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
{
  source: '../../../../../../examples/src/document_loaders/example_data/example.txt'
}
```

***

## API 参考

如需了解 `TextLoader` 所有功能和配置的详细文档，请参阅 [API 参考](https://reference.langchain.com/javascript/langchain-core/document_loaders/base/BaseDocumentLoader)。

***

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