Struct Tracing 

pub struct Tracing { /* private fields */ }

Tracing — records Playwright traces for debugging and inspection.

Trace files can be opened in the Playwright Trace Viewer. This is a Chromium-only feature; calling tracing methods on Firefox or WebKit contexts will fail.

See: https://playwright.dev/docs/api/class-tracing

Implementations

impl Tracing

pub fn new( parent: ParentOrConnection, type_name: String, guid: Arc<str>, initializer: Value, ) -> Result<Self>

Creates a new Tracing from protocol initialization.

Called by the object factory when the server sends a __create__ message.

pub async fn start( &self, options: impl Into<Option<TracingStartOptions>>, ) -> Result<()>

Start tracing.

Playwright implements tracing as a two-step process: tracingStart to configure the trace, then tracingStartChunk to begin recording.

Arguments

• options - Optional trace configuration (name, screenshots, snapshots)

Errors

Returns error if:

• Tracing is already active
• Communication with browser process fails

See: https://playwright.dev/docs/api/class-tracing#tracing-start

pub async fn stop( &self, options: impl Into<Option<TracingStopOptions>>, ) -> Result<()>

Stop tracing.

Playwright implements stopping as a two-step process: tracingStopChunk to finalize the recording, then tracingStop to tear down.

If options.path is provided, the trace is exported to that file as a .zip archive. If no path is provided, the trace is discarded.

Arguments

• options - Optional stop options; set path to save the trace to a file

Errors

Returns error if:

• Tracing was not active
• Communication with browser process fails

See: https://playwright.dev/docs/api/class-tracing#tracing-stop

pub async fn start_har( &self, path: impl Into<String>, options: impl Into<Option<StartHarOptions>>, ) -> Result<()>

Start recording a HAR (HTTP Archive) of network traffic to path.

The HAR is written when stop_har is called. A .zip path bundles resource bodies as separate entries (Attach); a plain path inlines them (Embed). The recorded HAR can be opened in browser devtools or replayed in tests via route_from_har.

Errors

Returns an error if communication with the browser process fails.

See: https://playwright.dev/docs/api/class-tracing#tracing-start-har

pub async fn stop_har(&self) -> Result<()>

Stop the HAR recording started by start_har and write it to the path given there.

Errors

Returns an error if start_har was not called first, or if communication with the browser process fails.

See: https://playwright.dev/docs/api/class-tracing#tracing-stop-har

Trait Implementations

impl Clone for Tracing

fn clone(&self) -> Tracing

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Tracing

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.