docs[minor]: updated DirectoryLoader docs (#6347)

* docs[minor]: updated DirectoryLoader docs

* cr

docs/core_docs/docs/integrations/document_loaders/file_loaders/directory.ipynb

@@ -0,0 +1,192 @@
+{
+ "cells": [
+  {
+   "cell_type": "raw",
+   "metadata": {},
+   "source": [
+    "---\n",
+    "sidebar_label: DirectoryLoader\n",
+    "sidebar_class_name: node-only\n",
+    "---"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# DirectoryLoader\n",
+    "\n",
+    "```{=mdx}\n",
+    "\n",
+    ":::tip Compatibility\n",
+    "\n",
+    "Only available on Node.js.\n",
+    "\n",
+    ":::\n",
+    "\n",
+    "```\n",
+    "\n",
+    "This notebook provides a quick overview for getting started with `DirectoryLoader` [document loaders](/docs/concepts/#document-loaders). For detailed documentation of all `DirectoryLoader` features and configurations head to the [API reference](https://api.js.langchain.com/classes/langchain_document_loaders_fs_directory.DirectoryLoader.html).\n",
+    "\n",
+    "This example goes over how to load data from folders with multiple files. The second argument is a map of file extensions to loader factories. Each file will be passed to the matching loader, and the resulting documents will be concatenated together.\n",
+    "\n",
+    "Example folder:\n",
+    "\n",
+    "```text\n",
+    "src/document_loaders/example_data/example/\n",
+    "├── example.json\n",
+    "├── example.jsonl\n",
+    "├── example.txt\n",
+    "└── example.csv\n",
+    "```\n",
+    "\n",
+    "## Overview\n",
+    "### Integration details\n",
+    "\n",
+    "| Class | Package | Compatibility | Local | PY support | \n",
+    "| :--- | :--- | :---: | :---: |  :---: |\n",
+    "| [DirectoryLoader](https://api.js.langchain.com/classes/langchain_document_loaders_fs_directory.DirectoryLoader.html) | [langchain](https://api.js.langchain.com/modules/langchain_document_loaders_fs_directory.html) | Node-only | ✅ | ✅ |\n",
+    "\n",
+    "## Setup\n",
+    "\n",
+    "To access `DirectoryLoader` document loader you'll need to install the `langchain` package.\n",
+    "\n",
+    "### Installation\n",
+    "\n",
+    "The LangChain DirectoryLoader integration lives in the `langchain` package:\n",
+    "\n",
+    "```{=mdx}\n",
+    "import IntegrationInstallTooltip from \"@mdx_components/integration_install_tooltip.mdx\";\n",
+    "import Npm2Yarn from \"@theme/Npm2Yarn\";\n",
+    "\n",
+    "<IntegrationInstallTooltip></IntegrationInstallTooltip>\n",
+    "\n",
+    "<Npm2Yarn>\n",
+    "  langchain\n",
+    "</Npm2Yarn>\n",
+    "\n",
+    "```"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Instantiation\n",
+    "\n",
+    "Now we can instantiate our model object and load documents:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import { DirectoryLoader } from \"langchain/document_loaders/fs/directory\";\n",
+    "import {\n",
+    "  JSONLoader,\n",
+    "  JSONLinesLoader,\n",
+    "} from \"langchain/document_loaders/fs/json\";\n",
+    "import { TextLoader } from \"langchain/document_loaders/fs/text\";\n",
+    "import { CSVLoader } from \"@langchain/community/document_loaders/fs/csv\";\n",
+    "\n",
+    "const loader = new DirectoryLoader(\n",
+    "  \"../../../../../../examples/src/document_loaders/example_data\",\n",
+    "  {\n",
+    "    \".json\": (path) => new JSONLoader(path, \"/texts\"),\n",
+    "    \".jsonl\": (path) => new JSONLinesLoader(path, \"/html\"),\n",
+    "    \".txt\": (path) => new TextLoader(path),\n",
+    "    \".csv\": (path) => new CSVLoader(path, \"text\"),\n",
+    "  }\n",
+    ");"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Load"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Document {\n",
+      "  pageContent: 'Foo\\nBar\\nBaz\\n\\n',\n",
+      "  metadata: {\n",
+      "    source: '/Users/bracesproul/code/lang-chain-ai/langchainjs/examples/src/document_loaders/example_data/example.txt'\n",
+      "  },\n",
+      "  id: undefined\n",
+      "}\n"
+     ]
+    }
+   ],
+   "source": [
+    "const docs = await loader.load()\n",
+    "// disable console.warn calls\n",
+    "console.warn = () => {}\n",
+    "docs[0]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{\n",
+      "  source: '/Users/bracesproul/code/lang-chain-ai/langchainjs/examples/src/document_loaders/example_data/example.txt'\n",
+      "}\n"
+     ]
+    }
+   ],
+   "source": [
+    "console.log(docs[0].metadata)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## API reference\n",
+    "\n",
+    "For detailed documentation of all DirectoryLoader features and configurations head to the API reference: https://api.js.langchain.com/classes/langchain_document_loaders_fs_directory.DirectoryLoader.html"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "TypeScript",
+   "language": "typescript",
+   "name": "tslab"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "mode": "typescript",
+    "name": "javascript",
+    "typescript": true
+   },
+   "file_extension": ".ts",
+   "mimetype": "text/typescript",
+   "name": "typescript",
+   "version": "3.7.2"
+  }
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+ "nbformat": 4,
+ "nbformat_minor": 4
+}