Comment on page
Templating Techniques for Web-pages
Cards and Kanban don't require connecting additional endpoints. Custom HTML view operates directly with object fields.

Apply it in the same way as in scenarios.
{{GlobalVar.myGlobalVar}}
{{id}}
{{role}}
{{firstName}}
{{HttpRequest.paramName}}
If you connect API-endpoint, you can deal with objects it provides.
{{#contentHead}}
{{firstName}} {{lastName}}
Project {{project_id.title}} // here project_id is a link
{{/contentHead}}
// the result may look like
Steve Jobs
Project Apple
{{#content}}
- {{firstName}} {{lastName}} launched {{project_id.title}}
{{/content}}
// the result may look like (for 2 objects, provided by API-endpoint)
- Steve Jobs launched Apple
- Bill Gates launched Microsoft
The principle is similar to the one used for scenarios
{{#arraylink_field}}
- {{title}} {{city}}
{{/arraylink_field}}
// the result may look like (for 2 objects in the arrayLink field)
- Apple Cupertino
- Microsoft Seattle
Similar to Templating in scenarios
/ shows if is_vip == true
{{#is_vip}}vip{{/is_vip}}
// shows if is_vip == false
{{^is_vip}}not vip{{/is_vip}}
You may apply complex HTML for building beautiful custom pages.