Splunk Dashboard Studio extension harness

studio> harness

$ native extension mode

Panel Size

Width × Height

Visualization

Bundle

Dashboard State

Mode Data status Loading

Visualization Options

Primary Data

Advanced State

Raw JSON editors

Typed options JSON Columnar dataSources JSON Submitted tokens JSON

LiveNo visualization selected·600×360

StatusLoading manifest…

Themedark

Modeview

>_ man studio-harness

Getting started

Select a built extension bundle.
Adjust generated option controls and data sliders.
Use No-data, Loading, mode, and resize controls to exercise lifecycle states.

Theme

The sun/moon icon changes both the harness chrome and the theme reported through DashboardExtensionAPI. In light mode, the contrast icon changes only the preview backdrop.

Preview scope

Enter exact dimensions, click Fit, or drag the lower-right handle. The iframe remains isolated and receives dimensions through the native API mock.

Advanced diagnostics

Use Advanced State for raw options, data sources, and tokens. Open Events in the telemetry strip for drilldowns, setOptions, and errors.