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scan.js
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scan.js
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const wrapper = document.createElement("div");
wrapper.style.position = "fixed";
wrapper.style.top = "0px";
wrapper.style.bottom = "0px";
wrapper.style.left = "0px";
wrapper.style.right = "0px";
wrapper.style.padding = "16px";
wrapper.style.backgroundColor = "rgba(0, 0, 0, .3)";
wrapper.style.display = "flex";
wrapper.style.alignItems = "center";
wrapper.style.justifyContent = "center";
wrapper.style.zIndex = "10000";
wrapper.style.flexDirection = "column";
document.body.appendChild(wrapper);
function cleanup() {
Quagga.stop();
document.body.removeChild(wrapper);
}
const button = document.createElement("button");
button.innerText = "Close";
button.addEventListener("click", cleanup);
wrapper.appendChild(button);
Quagga.init(
{
inputStream: {
name: "Live",
type: "LiveStream",
target: wrapper,
},
decoder: {
readers: [
"code_128_reader",
"ean_reader",
"ean_8_reader",
"code_39_reader",
"code_39_vin_reader",
"codabar_reader",
"upc_reader",
"upc_e_reader",
"i2of5_reader",
"2of5_reader",
"code_93_reader",
],
},
},
function (err) {
if (err) {
document.body.removeChild("wrapper");
console.log(err);
return;
}
wrapper.querySelector("canvas").style.display = "none";
console.log("Initialization finished. Ready to start");
Quagga.start();
Quagga.onDetected((data) => {
const code = data.codeResult.code;
console.log("Barcode detected", code);
if (!document.activeElement) {
console.log("No input focused, returning...");
return;
}
console.log("Simulate change ...", document.activeElement);
for (let i = 0; i < code.length; i++) {
const key = code[i];
document.activeElement.value = code.slice(0, i + 1);
const event = new InputEvent("change");
event.target = document.activeElement;
document.activeElement.dispatchEvent(event);
}
cleanup();
});
}
);