Random idea stuck in my head

worked on an idea for a site builder stuck in my head. The gimmick is that you can drag blocks around the page, then you can select a template , which then shows up as form where you can customize the fields. Behind the scenes, each template is an html template using handlebars expressions and contains a schema which defines what type a variable is. The idea is that you can simply pick a template that looks like what you want and simply populate the fields, or drop down to code and fine tune it to your liking. The templates I made dont look that pretty but I just wanted to share my dumb ass idea