Javascript Khmer Pdf 【99% TESTED】
Generating PDFs directly from a web browser is a powerful feature for any web application. However, for developers working with the Khmer language (ភាសាខ្មែរ), this task comes with a unique set of challenges. The main issue? Standard JavaScript PDF libraries often fail to render complex Khmer Unicode text correctly, resulting in broken, reversed, or completely missing characters.
npx base64 KhmerOSBattambang-Regular.ttf > fontBase64.txt
// Save the PDF doc.save("khmer-hello.pdf");
import jsPDF from "jspdf"; // Paste your Base64 string here (truncated for example) const khmerFontBase64 = "AAEAAAAOAIAAAwBgRk..."; javascript khmer pdf
npm install jspdf
Works for 80% of use cases, but very complex stacking may still have issues. Option B: Server-Side with Puppeteer (100% Accurate) The most reliable method: Use a headless Chrome browser (via Puppeteer) to render HTML/CSS with Khmer text, then convert to PDF. Chrome’s layout engine handles Khmer perfectly.
pdfMake.createPdf(docDefinition).download('khmer-report.pdf'); Generating PDFs directly from a web browser is
await page.setContent( <html> <head> <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+Khmer&display=swap" rel="stylesheet"> <style> body font-family: 'Noto Sans Khmer', sans-serif; padding: 40px; </style> </head> <body> $htmlContent </body> </html> );
const doc = new jsPDF();
// Usage const khmerHTML = <h1>សេចក្តីជូនដំណឹង</h1><p>កិច្ចប្រជុំនឹងចាប់ផ្តើមនៅម៉ោង ៣ រសៀល។</p> ; generateKhmerPDF(khmerHTML, 'meeting-notice.pdf'); Standard JavaScript PDF libraries often fail to render
// Write Khmer text doc.setFontSize(16); doc.text("សួស្តី ពិភពលោក!", 10, 20); // Hello World!
await page.pdf( path: outputPath, format: 'A4' ); await browser.close();
// Add the Khmer font doc.addFileToVFS("KhmerOSBattambang-Regular.ttf", khmerFontBase64); doc.addFont("KhmerOSBattambang-Regular.ttf", "KhmerOS", "normal"); doc.setFont("KhmerOS");
jsPDF does not perform full Khmer shaping. Simple words might render, but complex words with stacked consonants (e.g., "ក្រសួង" - ministry) will likely break. The subscripts will appear as separate, misplaced characters. Solution 2: The Robust Approach – PDFMake + Harfbuzz For professional Khmer PDF generation, you need a library that integrates a shaping engine . The best combination is PDFMake (easier layout) or Puppeteer (headless browser) with Harfbuzz -enabled font processing. Option A: PDFMake with Custom Khmer Font pdfmake has better font support than jsPDF and can handle some Khmer shaping if the font is properly embedded.
As Khmer Unicode support improves across browsers and libraries, we can expect better native solutions. Until then, understanding the shaping problem and choosing the right tool will save you hours of debugging broken characters. Have you successfully generated Khmer PDFs? Share your experience or library recommendations in the comments below!