The Code Behind Barcodes Richard Published: October 23, 2022 Categories: Studies Tags: Barcode · JavaScript · JS · UPC Table of Contents Toggle 1.0 Purpose2.0 History3.0 Breakdown3.1 Basics3.2 Digits3.2 Modules3.3 Number System Digit3.4 Check Digit Calculation3.5 Digit values4.0 Programming a Barcode Generator4.1 The Webpage4.2 Creating the Script4.3 Functions4.3.1 Validate UPC4.3.2 Calculate Check Digit4.3.3 Processing the UPC4.3.4 Filling the Background4.3.5 Rendering Spaces4.3.6 Rendering Bars4.3.7 Rendering Sequences4.3.8 Rendering the UPC4.3.9 Putting It All Together4.4 Final Code5.0 Final Result6.0 Conclusion7.0 References 5.0 Final Result Generate Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13