Decoding a barcode using JavaScript

Currently, I am facing an issue with my barcode gun scanner. It reads barcodes into input fields but returns each digit separately instead of as a whole string. This has been quite bothersome for me.

For instance, when I scan the barcode of a bottle of water, the input field captures the number accurately (e.g., 688267022760). However, upon console logging it, I find that I receive individual instances for every digit.

https://i.sstatic.net/NBuAM.png

In my VueJS template, I have set up the scanner event to trigger on input. I am unsure if this is the correct event and have experimented with keydown and keyup as well. Also, I am uncertain about the recommended event listener for a scanning gun. Here's what I currently have in my template:

<input id="packageInput" type="text" @input="onBarcodeScanned" />

And in my script:

onBarcodeScanned(barcode) {
  let numbers = barcode.data; 
  console.log(numbers); 
  let newarr = []; 

  for (var i = 0; i < numbers; i++) {
    newarr.push(numbers);
  }
},

The desired outcome is to store those individual values in an array and then join them together as a string.

P.S.

After analyzing the barcode property, I found that it consists of multiple objects with handlers for various functions. The property 'data' is what I am interested in. Below is an example of the barcode objects https://i.sstatic.net/XjZy3.png

I am puzzled about how to go about solving this issue

P.P.S I am aware that the scanner itself comes with programming instructions, some of which are unclear to me. Could there be a certain type of barcode that returns as a string rather than individual digits as objects? The scanner model I am using is a Wasp CCDScanner WCS3900

Answer №1

onInput is triggered each time the value changes. Barcode scanners typically mimic keypresses to input scanned values, causing your app to register each digit as a separate keypress event. The data property of an input event only reflects the changed portion of the input at that moment.

To accurately determine when the input process is complete, you may need to look for signals indicating the end of scanning. Many barcode scanners send an ENTER or TAB press signal after finishing a scan, which could be more suitable for detection using a keypress or keyup event instead of relying solely on input events.

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