Host-owned Composer Lite Playground

Try the public Host-owned Composer Lite API from a single browser page. The host page owns submit and media upload callbacks.

Create / Mount configuration

Enable uploadMedia Enable Content Warning Enable hashtag pin Show KeyboardButtonBar Show Editor submit button Follow preferred height

Editor min lines

Editor max lines

Leave both line fields blank to retain legacy sizing. Supply both positive integers to use editor-local auto-grow.

Enter behavior

Submit shortcut preset

not mounted

Runtime controls

Context

Initial / replacement content

Reply reference

Quote references (one per line)

Channel reference must be a valid note/nevent reference supplied by the host. No repository channel event is presented as a fake valid example.

Channel reference

Channel name

Channel about

Relay URL

Settings

Locale

Theme mode

mediaFreePlacement

Image quality

Video quality

Other public setSettings keys

API acceptance / may have no visible effect in Lite.

clientTagEnabled quoteNotificationEnabled replyNotificationEnabled showMascot showFlavorText

Advanced: legacy compression keys

Compatibility-only aliases; prefer Image quality and Video quality above.

imageCompressionLevel

videoCompressionLevel

Host simulation

Submit behavior

Submit delay

Upload delay

Upload controls require Enable uploadMedia. The existing filename rule also remains: a filename containing “fail” fails.

Composer

Status / Event log loading

Last submit output

No submit output yet.