trace_events.d.ts
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declare module "trace_events" {
/**
* The `Tracing` object is used to enable or disable tracing for sets of
* categories. Instances are created using the
* `trace_events.createTracing()` method.
*
* When created, the `Tracing` object is disabled. Calling the
* `tracing.enable()` method adds the categories to the set of enabled trace
* event categories. Calling `tracing.disable()` will remove the categories
* from the set of enabled trace event categories.
*/
interface Tracing {
/**
* A comma-separated list of the trace event categories covered by this
* `Tracing` object.
*/
readonly categories: string;
/**
* Disables this `Tracing` object.
*
* Only trace event categories _not_ covered by other enabled `Tracing`
* objects and _not_ specified by the `--trace-event-categories` flag
* will be disabled.
*/
disable(): void;
/**
* Enables this `Tracing` object for the set of categories covered by
* the `Tracing` object.
*/
enable(): void;
/**
* `true` only if the `Tracing` object has been enabled.
*/
readonly enabled: boolean;
}
interface CreateTracingOptions {
/**
* An array of trace category names. Values included in the array are
* coerced to a string when possible. An error will be thrown if the
* value cannot be coerced.
*/
categories: string[];
}
/**
* Creates and returns a Tracing object for the given set of categories.
*/
function createTracing(options: CreateTracingOptions): Tracing;
/**
* Returns a comma-separated list of all currently-enabled trace event
* categories. The current set of enabled trace event categories is
* determined by the union of all currently-enabled `Tracing` objects and
* any categories enabled using the `--trace-event-categories` flag.
*/
function getEnabledCategories(): string | undefined;
}