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Coverage panel. start records JavaScript and CSS usage; stop reports per-file used/unused bytes; detail lists the unused ranges of one file with line numbers and snippets.

Parameters

integer
Target tab id from browser_tabs, which lists tabs across all windows. Defaults to the agent’s most recently opened usable tab, or the only usable tab. Otherwise select a listed tabId.
enum
required
One of: start, stop, detail.
string
 
integer
 
boolean
start: reload after enabling so every function is instrumented (default true, like the DevTools Coverage panel)

Example