puppeteer/new-docs/puppeteer.protocol.tracing.startrequest.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Tracing](./puppeteer.protocol.tracing.md) &gt; [StartRequest](./puppeteer.protocol.tracing.startrequest.md)

## Protocol.Tracing.StartRequest interface

<b>Signature:</b>

```typescript
export interface StartRequest 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [bufferUsageReportingInterval](./puppeteer.protocol.tracing.startrequest.bufferusagereportinginterval.md) | number | If set, the agent will issue bufferUsage events at this interval, specified in milliseconds |
|  [categories](./puppeteer.protocol.tracing.startrequest.categories.md) | string | Category/tag filter |
|  [options](./puppeteer.protocol.tracing.startrequest.options.md) | string | Tracing options |
|  [streamCompression](./puppeteer.protocol.tracing.startrequest.streamcompression.md) | [StreamCompression](./puppeteer.protocol.tracing.streamcompression.md) | Compression format to use. This only applies when using <code>ReturnAsStream</code> transfer mode (defaults to <code>none</code>) |
|  [streamFormat](./puppeteer.protocol.tracing.startrequest.streamformat.md) | [StreamFormat](./puppeteer.protocol.tracing.streamformat.md) | Trace data format to use. This only applies when using <code>ReturnAsStream</code> transfer mode (defaults to <code>json</code>). |
|  [traceConfig](./puppeteer.protocol.tracing.startrequest.traceconfig.md) | [TraceConfig](./puppeteer.protocol.tracing.traceconfig.md) |  |
|  [transferMode](./puppeteer.protocol.tracing.startrequest.transfermode.md) | ('ReportEvents' \| 'ReturnAsStream') | Whether to report trace events as series of dataCollected events or to save trace to a stream (defaults to <code>ReportEvents</code>). (StartRequestTransferMode enum) |