SheetDream provides a series of code generation tools to help aid you in calling your new API, and in the case of HTML, to aid you in quickly getting your spreadsheet data up in a neat format on your website or app.
The central idea and workflow behind the code generation tools is:
Generate the code, and copy + paste it into a live code editing app like JSFiddle. This allows you to quickly tweak HTML/CSS and see how your live data looks, without having to go through any kind of a "update the CMS page, save, view, repeat" type process. Instead you tweak the code and hit "Run".
Once things look to your liking, you can copy your code from JSFiddle and then update your CMS page to display your data live on your website.
The code generation tools, and using tools like JSFiddle, CodePen or Stackblitz for quickly iterating on the HTML or code allows for truly rapid application development. You can literally get something pretty up and going in just minutes!