See How to easily convert HTML Form to JSON for a good description of dealing with this issue and others like it (such as multiple fields with the same name) when manually constructing JSON out of ...

The key takeaway here is that JSON does everything necessary to handle the need—in this case, holding the information in the form—without a lot of extra information. You can glance at this ...

Each tab corresponds to a different form of structured data: Microdata, RDFa, and JSON-LD structured data. Microdata is a way to add metadata within the HTML code and is a part of the HTML ...