getEnabledCategories
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.
Given the file test.js
below, the command node --trace-event-categories node.perf test.js
will print 'node.async_hooks,node.perf'
to the console.
const trace_events = require('node:trace_events');
const t1 = trace_events.createTracing({ categories: ['node.async_hooks'] });
const t2 = trace_events.createTracing({ categories: ['node.perf'] });
const t3 = trace_events.createTracing({ categories: ['v8'] });
t1.enable();
t2.enable();
console.log(trace_events.getEnabledCategories());
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Since
v10.0.0