Subpath exports

The package root is the easiest starting point, but the package also exposes focused ESM subpaths. They let an application import a format family or a renderer without maintaining filesystem-relative imports.

The list below mirrors the current exports map in package.json. Only these public subpaths are compatibility promises; arbitrary paths under src/ are not.

Public map

Import specifier	Main surface
@sythos/js_barcode_universal	Full root facade: registry, general encode/decode, core, image, formats and renderers.
@sythos/js_barcode_universal/core	BitMatrix, bit readers/writers, finite fields, Reed–Solomon helpers and SDK errors.
@sythos/js_barcode_universal/image	LuminanceSource, binarizers, perspective transforms and grid samplers.
@sythos/js_barcode_universal/oned	EAN/UPC, ISBN, Code 11/39/93/128, ITF, Codabar, MSI, Pharmacode and EAN add-ons.
@sythos/js_barcode_universal/qr	QR Code encoder, decoder and detector.
@sythos/js_barcode_universal/datamatrix	Data Matrix ECC 200 encoder, decoder and detector.
@sythos/js_barcode_universal/databar	GS1 DataBar, GTIN helpers and GS1 element-string helpers.
@sythos/js_barcode_universal/aztec	Aztec Code encoder, decoder, detector and table helpers.
@sythos/js_barcode_universal/aztecrune	Aztec Rune encoder, decoder, detector and table helpers.
@sythos/js_barcode_universal/pdf417	PDF417 encoder, decoder, detector, compaction and error correction.
@sythos/js_barcode_universal/compactpdf417	Compact PDF417 encoder, decoder, detector and geometry helpers.
@sythos/js_barcode_universal/micropdf417	MicroPDF417 encoder, decoder, detector, variants and correction helpers.
@sythos/js_barcode_universal/microqr	Micro QR encoder, decoder and detector.
@sythos/js_barcode_universal/rmqr	rMQR encoder, decoder, detector and size/table helpers.
@sythos/js_barcode_universal/frameqr	Sythos Canvas QR profile encoder, decoder, detector and profile helpers.
@sythos/js_barcode_universal/render	All renderers, canvas backends, option normalisation and colour parsing.
@sythos/js_barcode_universal/render/svg	toSVG, toSVGDataURI.
@sythos/js_barcode_universal/render/png	toPNG, toPNGDataURI, deflateStored.
@sythos/js_barcode_universal/render/image-data	toImageData, toCanvas.
@sythos/js_barcode_universal/bundle	ESM bundle entry point. Prefer the root or focused subpaths for readable imports.
@sythos/js_barcode_universal/bundle/iife	IIFE bundle asset. Use it as a browser script rather than assuming it is an ESM module.
@sythos/js_barcode_universal/package.json	Package metadata for tooling that explicitly needs it.

Every format subpath exposes its public index.d.ts alongside the runtime module. For example, the QR subpath exports encodeQR, decodeQR, detectQR and detectAndDecodeQR; the PDF417 family exposes the corresponding encoder, decoder and detector functions plus format-specific helpers.

Import focused code

import { encodeQR } from '@sythos/js_barcode_universal/qr';
import { encodeDataMatrix } from '@sythos/js_barcode_universal/datamatrix';
import { toSVG } from '@sythos/js_barcode_universal/render/svg';

const qr = encodeQR('focused import', { ecc: 'M' });
const dataMatrix = encodeDataMatrix('another focused import');

console.log(toSVG(qr, { scale: 6, margin: 4 }).startsWith('<svg'));
console.log(dataMatrix.width > 0);
// true
// true

The focused import does not change the matrix or rendering contract. It only avoids importing the root facade when the application already knows its format.

Bundle choices

The ESM bundle is available through the ./bundle export and as the committed bundle/sythos-barcode.esm.js asset. The IIFE bundle is available through ./bundle/iife and is the asset used by the repository’s plain HTML examples:

<script src="https://unpkg.com/@sythos/js_barcode_universal/bundle/sythos-barcode.js"></script>
<script>
  const matrix = SythosBarcode.encode('IIFE import', { format: 'qr' });
</script>

For an application build, prefer the package root or a focused subpath so the toolchain can see named imports. Pin a package version or a bundle URL in production when reproducible deployed bytes matter.

What not to import

Avoid imports such as:

import { encodeQR } from '../../src/ts/qr/encoder.js';

They couple an application to the repository layout, bypass the package export map and can load TypeScript source that Node.js cannot execute directly. Use the documented package specifier instead:

import { encodeQR } from '@sythos/js_barcode_universal/qr';

The project may reorganise internal files while keeping the public subpath stable. That is precisely what the exports map is there to protect.