[**@eastgold15/elogs**](../README.md)

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[@eastgold15/elogs](../README.md) / injectTraceContext

# Function: injectTraceContext()

> **injectTraceContext**(`logger`): `Promise`\<[`TraceContextFields`](../interfaces/TraceContextFields.md) \| `undefined`\>

Defined in: packages/elogs/src/otel.ts:54

Injects active OpenTelemetry span IDs into the request context bag when
`@opentelemetry/api` is installed and a span is active.

接受 GlobalLogger —— 无需手动传 request,GlobalLogger 自己从 ALS 拿
(若在请求作用域外,mergeContext 为 noop + warn 一次)。

## Parameters

### logger

`Pick`\<[`GlobalLogger`](../interfaces/GlobalLogger.md), `"mergeContext"`\>

## Returns

`Promise`\<[`TraceContextFields`](../interfaces/TraceContextFields.md) \| `undefined`\>