Feature Request: Better UX for managing large JSON objects in UI

[luke-belton]

Feature request

Is your feature request related to a problem?

The UI feels sluggish when editing a large JSON object - specifically for feature flag payloads.

Describe the solution you'd like

• More performant UI
• Ability to expand/collapse nodes in the JSOn object

Describe alternatives you've considered

Edit the JSON outside of PostHog + paste it in

Additional context

From: https://posthoghelp.zendesk.com/agent/tickets/43646

Debug info

Kind: support

Target area: feature_flags

Report event: http://go/ticketByUUID/0a67a690-cbbc-4a7f-8bee-9d97715f4523

Session: https://us.posthog.com/project/sTMFPsFhdP1Ssg/replay/019ac028-1e92-73fe-b7f2-3a631ed61b6d?t=920

Exceptions: https://us.posthog.com/project/2/error_tracking?filterGroup=%7B%22type%22%3A%22AND%22%2C%22values%22%3A%5B%7B%22type%22%3A%22AND%22%2C%22values%22%3A%5B%7B%22key%22%3A%22%24session_id%22%2C%22value%22%3A%5B%22019ac028-1e92-73fe-b7f2-3a631ed61b6d%22%5D%2C%22operator%22%3A%22exact%22%2C%22type%22%3A%22event%22%7D%5D%7D%5D%7D

Location: https://us.posthog.com/project/228423/feature_flags/250421

Persons-on-events mode for project: person_id_override_properties_on_events