Chapter Goal: I haven’t yet discussed two form fields in great detail in regard to JavaScript: digital signatures and barcodes. Thus, this chapter focuses on them. Let’s first look at how they and other fields relate to security.
If you want to work along in this lesson or review the final result, download the Chapter 19 files from the link in the introduction. The file with the label “Start” is the file without the code, and the file with the label “End” is the final result. You will ...