Wie man eine PDF-Datei in Node.js generiert

# Bash code to install the IronPDF library in your Node.js project.
npm install ironpdf

# Bash code to install the IronPDF library in your Node.js project.
npm install ironpdf

// Import necessary modules from IronPDF and Node.js
const { PDFGenerator, PDFDocument, IronPDFGlobalConfig } = require('ironpdf');
const fs = require('fs'); // File system module for handling file operations

// Initialize PDF Generator
const pdfGenerator = new PDFGenerator();

async function generatePdfFromHtml() {
    // HTML content to be converted into a PDF
    const htmlContent = '<h1>Hello World</h1>';

    try {
        // Convert HTML string to a PDF document
        const pdfDoc = await pdfGenerator.fromHtml(htmlContent);
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('hello_world.pdf');
        console.log('PDF generated successfully from HTML string.');
    } catch (error) {
        console.error('Error generating PDF from HTML:', error);
    }
}

async function generatePdfFromWebPage() {
    // URL of the web page to be converted into a PDF
    const url = 'https://en.wikipedia.org/wiki/PDF';

    try {
        // Convert web page URL to a PDF document
        const pdfDoc = await pdfGenerator.fromUrl(url);
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('wikipedia_pdf.pdf');
        console.log('PDF generated successfully from webpage URL.');
    } catch (error) {
        console.error('Error generating PDF from webpage:', error);
    }
}

async function generatePdfFromImages() {
    // Directory containing images
    const imageDir = './images';
    const imageFiles = fs.readdirSync(imageDir);

    try {
        // Filter only JPEG files from the directory
        const jpegImages = imageFiles.filter(file => file.endsWith('.jpeg'));

        // Convert filtered images to a single PDF document
        const pdfDoc = await pdfGenerator.fromImages(jpegImages.map(img => `${imageDir}/${img}`));
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('images.pdf');
        console.log('PDF generated successfully from images.');
    } catch (error) {
        console.error('Error generating PDF from images:', error);
    }
}

// Execute the functions to generate PDFs
generatePdfFromHtml();
generatePdfFromWebPage();
generatePdfFromImages();

// Import necessary modules from IronPDF and Node.js
const { PDFGenerator, PDFDocument, IronPDFGlobalConfig } = require('ironpdf');
const fs = require('fs'); // File system module for handling file operations

// Initialize PDF Generator
const pdfGenerator = new PDFGenerator();

async function generatePdfFromHtml() {
    // HTML content to be converted into a PDF
    const htmlContent = '<h1>Hello World</h1>';

    try {
        // Convert HTML string to a PDF document
        const pdfDoc = await pdfGenerator.fromHtml(htmlContent);
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('hello_world.pdf');
        console.log('PDF generated successfully from HTML string.');
    } catch (error) {
        console.error('Error generating PDF from HTML:', error);
    }
}

async function generatePdfFromWebPage() {
    // URL of the web page to be converted into a PDF
    const url = 'https://en.wikipedia.org/wiki/PDF';

    try {
        // Convert web page URL to a PDF document
        const pdfDoc = await pdfGenerator.fromUrl(url);
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('wikipedia_pdf.pdf');
        console.log('PDF generated successfully from webpage URL.');
    } catch (error) {
        console.error('Error generating PDF from webpage:', error);
    }
}

async function generatePdfFromImages() {
    // Directory containing images
    const imageDir = './images';
    const imageFiles = fs.readdirSync(imageDir);

    try {
        // Filter only JPEG files from the directory
        const jpegImages = imageFiles.filter(file => file.endsWith('.jpeg'));

        // Convert filtered images to a single PDF document
        const pdfDoc = await pdfGenerator.fromImages(jpegImages.map(img => `${imageDir}/${img}`));
        // Save the generated PDF document to a file
        await pdfDoc.saveAs('images.pdf');
        console.log('PDF generated successfully from images.');
    } catch (error) {
        console.error('Error generating PDF from images:', error);
    }
}

// Execute the functions to generate PDFs
generatePdfFromHtml();
generatePdfFromWebPage();
generatePdfFromImages();