Async AutoFill With Caching: Filling Form Fields From External APIs at Runtime

Part 20 of the series: "Extending bpmn-io Form-JS Beyond Its Limits" A form has a "Related Ticket" dropdown. When the user selects a ticket, five fields in the current form should auto-populate with data from that ticket: the assignee, the due date, the priority, the category, and a free-text description. The data lives in an external API. The fields that should be populated depend on configuration set by the form designer in the properties panel. This is ticket auto-fill. The form designer conf