Read Code 39 Barcodes with JavaScript via C++

Read Code 39 barcode in JavaScript using server-side Aspose.BarCode for JavaScript via C++ API

How to Read Code 39 barcode Using JavaScript via C++

To scan Code 39 barcode, try Aspose.BarCode for JavaScript , a potent and easy-to-use barcode library with rich functionality that works in any moder browser. Download the latest version directly from the Releases Site and then follow installation instructions .

Command<script type="text/javascript" src="Aspose.BarCode.JS.Cpp.js" async onload="initializeModule()"></script>
<script>
// Global BarCode module instance
var BarCodeInstance;

// Async function for module initialization
async function initializeModule() {
    try {
        BarCodeInstance = await BarCode();
        console.log('BarCode module has loaded');
        // Enable barcode-related controls here
    } catch (error) {
        console.error("BarCode module initialization error:", error);
    }
}
</script>

Steps for Scanning Code 39 barcode in JavaScript

Aspose.BarCode allows developers to read Code 39 barcode barcodes from stream or image with few lines of code

Create instance of BarCode module
Create a new instance of Aspose.BarCode.BarCodeReader class
Pass the source image path containing Code 39 barcode as a parameter
Pass an appropriate DecodeType as the second parameter
Loop through the decoding results
Get barcode text using the CodeText property

System Requirements

Aspose APIs are supported on all major platforms and operating systems. Before executing the code sample below, please make sure that your system comply with the following requirements.

Aspose.BarCode for JavaScript via C++ is independent of any specific operating system, allowing it to function on any platform that supports a compatible browser or runtime environment. This includes major operating systems such as Windows, macOS, Linux, iOS, and Android. For detailed technical requirements, see [System Requirements](https://docs.aspose.com/barcode/javascript-cpp/system-requirements/).

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Code to be executed - JavaScript

    var reader = new BarCodeInstance.BarCodeReader("<file name>", "Code39");
reader.ReadBarCodes();

//Display found barcodes count
const count = reader.FoundCount;
console.log('Barcodes found: ' + count);

// Ensure there are barcodes found
if (count > 0) {
    // Iterate through each found barcode
    for (let i = 0; i < count; i++) {
        // Retrieve the barcode at the current index
        const res = reader.FoundBarCodes(i);
        
        // Print the code text of the barcode
        console.log(`Barcode ${i + 1}: ${res.CodeText}`);
    }
} else {
    console.log('No barcodes found.');
}

// Cleanup resources
reader.delete()