如果表单字段留空，如何从HTML电子邮件中删除表行

I'm currently working on a materials order form for the place I work in order to save money. So far, I have about 90% of the different parts working how I'd like them to work. I am new to coding in every aspect, so I apologize if this is some super basic concept. I've been searching the web for days trying to find a solution to this, but every time I come across something helpful like "Use this JS script" I'll come across something like, "Don't ever use JS script for this".I'm currently working on a materials order form