Barcode Generator reports success but renders no barcode and keeps SVG/PNG exports disabled

[baixiangcpp]

Summary

The Barcode Generator reports a successful generation, but no barcode visual is rendered and the SVG/PNG export actions remain disabled.

Reproduction

1. Open https://byteflow.tools/en/barcode-generator
2. Keep the default CODE128 format.
3. Enter ABC-123 in Input.
4. Click Generate.

Expected

• A visible CODE128 barcode should appear in Preview + Metadata.
• SVG and PNG export buttons should become enabled.
• The generated visual should be usable for scanning or downloading.

Actual

• The page shows Generate completed. and Generated CODE128 barcode..
• The preview area still says Preview will appear here.
• The DOM contains no generated barcode image/canvas (the only image is the site brand mark).
• SVG and PNG remain disabled.
• Copy only copies metadata text:

Format: CODE128
Input: ABC-123
Normalized: ABC-123
Bar Width: 2
Bar Height: 120
Line Color: #111827
Background: #FFFFFF
Display Label: Yes

Status: Generated CODE128 barcode.

Additional confirmation

The same behavior occurs with EAN-13:

• Input: 400638133393
• Normalized value shown: 4006381333931
• Status: Generated EAN13 barcode.
• Preview remains Preview will appear here
• SVG/PNG remain disabled

This makes the core barcode output and export workflow unusable even though the UI reports success.