zbar-wasi

Scan barcodes in web browsers

This library allows web browsers to scan barcodes with a Webassembly and WASI backend.

Why?

• Unlike most Webassembly projects this one is compiled with WASI instead of Emscripten.
• Optimized for size with a WASM binary size of 161.98 KB gzipped (244.40 KB uncompressed).
• Works perfectly on mobile devices and desktop

Demo

Try scanning barcodes with your camera: https://myisaak.github.io/zbar-wasi/ Watch your command line for found barcodes.

Installation

npm install zbar-wasi

Usage

import { scanImage, createZbar } from "zbar-wasi";

const start = async () => {
  // move ./node_modules/zbar-wasi/dist/zbar.wasm to your web directory"
  const ZBAR = await createZbar({ wasmpath: "./zbar.wasm" });
  const imageData = ctx.getImageData(0, 0, width, height);
  const results = scanImage(imageData);
  console.log(results);
  // outputs [ barcode1, barcode2, ... ]
}
start();