Node.js에서 PDF 파일을 생성하는 방법

2.1. Installing IronPDF

Before diving into the world of PDF generation, you need to install IronPDF. The process is straightforward, thanks to npm - Node.js's package manager. Open your terminal and run the following command:

 npm과 @ironsoftware/ironpdf

This command fetches and installs the IronPDF package, making it available for use in your Node.js project.

To install the IronPDF engine that is required for using the IronPDF library, run the following command on the console.

npm install @ironsoftware/ironpdf-engine-windows-x64

npm install @ironsoftware/ironpdf-engine-windows-x64

4.1. Convert HTML to PDF Document Using IronPDF

import { PdfDocument } from "@ironsoftware/ironpdf";

(async () => {
  // Create a PDF from an HTML string
  const pdf = await PdfDocument.fromHtml(
    "<h1>Hello Developers This is an Example PDF created with IronPDF</h1>"
  );

  // Export the PDF to a file
  await pdf.saveAs("output.pdf");
})();

import { PdfDocument } from "@ironsoftware/ironpdf";

(async () => {
  // Create a PDF from an HTML string
  const pdf = await PdfDocument.fromHtml(
    "<h1>Hello Developers This is an Example PDF created with IronPDF</h1>"
  );

  // Export the PDF to a file
  await pdf.saveAs("output.pdf");
})();

4.2. Create PDF Files from a URL Using IronPDF

Creating PDF files from a URL using IronPDF in Node.js is a powerful feature that allows you to convert web content into PDF documents programmatically. Here's an example code snippet that demonstrates how to achieve this:

import { PdfDocument } from "@ironsoftware/ironpdf";

(async () => {
  // URL of the web page to convert to PDF
  const url = "https://google.com";

  // Create a PDF doc from the specified URL
  const pdf = await PdfDocument.fromUrl(url);

  // Save the PDF to a file
  await pdf.saveAs("output_from_url.pdf");
})();

import { PdfDocument } from "@ironsoftware/ironpdf";

(async () => {
  // URL of the web page to convert to PDF
  const url = "https://google.com";

  // Create a PDF doc from the specified URL
  const pdf = await PdfDocument.fromUrl(url);

  // Save the PDF to a file
  await pdf.saveAs("output_from_url.pdf");
})();

In this code:

1. The PdfDocument class is imported from the IronPDF package.
2. Inside an asynchronous function (wrapped in an immediately-invoked function expression), a variable url is defined with the URL of the web page you want to convert to a PDF.
3. The fromUrl method is then used to create a PDF document from the specified URL. IronPDF fetches the content from the URL and converts it into a PDF document.
4. Finally, the saveAs method is employed to save the generated PDF to a file named "output_from_url.pdf."

This example showcases the simplicity of using IronPDF to convert web content from a URL into a PDF file, making it a valuable tool for scenarios where dynamic web content needs to be archived or shared in a PDF format.

Output PDF generated from a URL using IronPDF library

4.3. Generating PDF File from Images Using IronPDF

In addition to HTML, IronPDF provides functionality to generate PDF files from images. This is particularly useful when dealing with scenarios where images need to be compiled into a single PDF document. Let's explore a simple example:

import { PdfGenerator } from "@ironsoftware/ironpdf";
import fs from "fs";

(async () => {
  // Specify the directory path
  const directoryPath = "./images";

  // Read the contents of the directory
  fs.readdir(directoryPath, (err, files) => {
    if (err) {
      console.error("Error reading directory:", err);
      return;
    }

    // Filter file names to include only .jpg and .jpeg extensions
    const jpegFiles = files.filter(
      (file) =>
        file.toLowerCase().endsWith(".jpg") || file.toLowerCase().endsWith(".jpeg")
    );

    // Construct full file paths for the filtered files
    const filePaths = jpegFiles.map((file) => `${directoryPath}/${file}`);

    // Converts the images to a PDF and save it.
    PdfGenerator.imageToPdf(filePaths).then((returnedPdf) => {
      returnedPdf.saveAs("composite.pdf");
    });

    // Also see PdfDocument.rasterizeToImageFiles() method to flatten a PDF to images or thumbnails
  });
})();

import { PdfGenerator } from "@ironsoftware/ironpdf";
import fs from "fs";

(async () => {
  // Specify the directory path
  const directoryPath = "./images";

  // Read the contents of the directory
  fs.readdir(directoryPath, (err, files) => {
    if (err) {
      console.error("Error reading directory:", err);
      return;
    }

    // Filter file names to include only .jpg and .jpeg extensions
    const jpegFiles = files.filter(
      (file) =>
        file.toLowerCase().endsWith(".jpg") || file.toLowerCase().endsWith(".jpeg")
    );

    // Construct full file paths for the filtered files
    const filePaths = jpegFiles.map((file) => `${directoryPath}/${file}`);

    // Converts the images to a PDF and save it.
    PdfGenerator.imageToPdf(filePaths).then((returnedPdf) => {
      returnedPdf.saveAs("composite.pdf");
    });

    // Also see PdfDocument.rasterizeToImageFiles() method to flatten a PDF to images or thumbnails
  });
})();

This code utilizes IronPDF, a Node.js library, to convert a collection of JPEG images in a specified directory into a single PDF document. Initially, the code specifies the directory path containing the images. It then reads the contents of the directory using the fs.readdir function. Subsequently, it filters the file names to include only those with ".jpg" or ".jpeg" extensions.

The full file paths for the filtered images are constructed, and the PdfGenerator.imageToPdf method is employed to convert these images into a PDF document. The resulting PDF is then saved as "composite.pdf." This script demonstrates the streamlined process offered by IronPDF for converting a batch of images into a consolidated PDF file, providing a practical solution for scenarios where image content needs to be compiled and presented in a single document.

Output PDF generated from Images using IronPDF library