hasSubscribers
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
}
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Since
v15.1.0, v14.17.0
Return
If there are active subscribers
Parameters
name
The channel name