hasSubscribers

external fun hasSubscribers(name: String): Boolean(source)
external fun hasSubscribers(name: Symbol): Boolean(source)

Check if there are active subscribers to the named channel. This is helpful if the message you want to send might be expensive to prepare.

This API is optional but helpful when trying to publish messages from very performance-sensitive code.

import diagnostics_channel from 'node:diagnostics_channel';

if (diagnostics_channel.hasSubscribers('my-channel')) {
// There are subscribers, prepare and publish message
}

Since

v15.1.0, v14.17.0

Return

If there are active subscribers

Parameters

name

The channel name