arrayBufferToBase64 Utility

Overview

The arrayBufferToBase64 utility converts an ArrayBuffer into a Base64-encoded string.
This is especially useful when you need to embed binary data (like fonts or images) into jsPDF’s virtual file system (VFS) or send it over the network as text.

import arrayBufferToBase64 from '@/utils/ArrayBufferToBase64'

Signature

function arrayBufferToBase64(buffer: ArrayBuffer): string

• buffer: The binary data you want to convert.
• returns: A Base64 string representation of the buffer.

Basic Usage

const response = await fetch('/path/to/file.bin')
const data = await response.arrayBuffer()

const base64 = arrayBufferToBase64(data)
console.log('Base64 data:', base64)

With jsPDF VFS

You’ll typically use arrayBufferToBase64 indirectly via higher-level helpers (like loadCustomFont), but you can also use it directly:

import { useJsPdf } from 'vue-pdfiy'
import arrayBufferToBase64 from '@/utils/ArrayBufferToBase64'

const { addFileToVFS, addText, savePdf } = useJsPdf({
  orientation: 'p',
  unit: 'mm',
  format: 'a4',
})

export async function example_AddBinaryToVfs() {
  const response = await fetch('/assets/custom-icon.ttf')
  const buffer = await response.arrayBuffer()

  const base64 = arrayBufferToBase64(buffer)

  // Store in jsPDF VFS (for fonts or other binary resources)
  addFileToVFS({ name: 'custom-icon.ttf', content: base64 })

  // Draw something just to produce a PDF
  addText('Binary added to VFS', { x: 20, y: 30 })

  savePdf('vfs-binary-example.pdf')
}