devtools_coverage

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.

The tool names stay the same across browsers. See browser selection and Firefox and Zen exceptions before choosing an operation.

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

{
  "tabId": 1234,
  "action": "start",
  "reload": true
}

{
  "tabId": 1234,
  "action": "stop"
}

{
  "tabId": 1234,
  "action": "detail",
  "url": "https://example.com/app.js"
}

Browser automation

Developer tools

Parameters

Example

​Parameters

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Parameters

Example