How to Import pdf-parse in NodeJS Code Without Using npm Install?

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this is the code
import path from “path”;
import pdfParse from “pdf-parse”;
import { PineconeClient } from “@pinecone-database/pinecone”;
import { OpenAIEmbeddings } from “langchain/embeddings/openai”;
import { PineconeStore } from “langchain/vectorstores/pinecone”;
import { RecursiveCharacterTextSplitter } from “langchain/text_splitter”;
import { DocxLoader } from “langchain/document_loaders/fs/docx”;
import { TextLoader } from “langchain/document_loaders/fs/text”;
import { PDFLoader } from “langchain/document_loaders/fs/pdf”;
import mammoth from “mammoth”;

export default defineComponent({
async run({ steps, $ }) {

_//path of file_
**const** filePath = "/tmp/" + steps.download_file.$return_value.name;
**const** fileExtension = path.extname(filePath).toLowerCase();
**let** docs;
**switch** (fileExtension) {

  **case** ".docx":
      **const** docxLoader = **new** DocxLoader(filePath);
      **const** docxDocs = **await** docxLoader.load();
      console.log("Loaded DOCX document:", docxDocs);
      docs=docxDocs;
      **break**;

    **case** ".txt":
      **const** textLoader = **new** TextLoader(filePath);
      **const** textDocs = **await** textLoader.load();
      console.log("Loaded text document:", textDocs);
      docs=textDocs;
      **break**;

    **case** ".pdf":
      **const** pdfLoader = **new** PDFLoader(filePath);
      **const** pdfDocs = **await** pdfLoader.load();
      console.log("Loaded PDF document:", pdfDocs);
      docs=pdfDocs;
      **break**;
    **default**:
      console.error("Unsupported file extension:", fileExtension);
}