importScripts("https://cdn.jsdelivr.net/npm/[email protected]/dist/jsQR.min.js");

let width = 0, height = 0;

self.addEventListener('message', event => {

if ('width' in event.data && 'height' in event.data) {

this.width = event.data.width;

this.height = event.data.height;

}

const {data} = event.data;

if (!data) return;

const t0 = new Date().getTime();

const code = jsQR(data, this.width, this.height, { inversionAttempts: "dontInvert" });

const t1 = new Date().getTime();

if (code != null) {

console.log(`Scanned in ${t1-t0} ms`);

postMessage({

data: code.data,

ms: t1-t0

});

}

});