Function channel

lib/diagnostics_channel.js:262–271

(name)

const channels = new WeakRefMap();

function channel(name) {
  const channel = channels.get(name);
  if (channel) return channel;

  if (typeof name !== 'string' && typeof name !== 'symbol') {
    throw new ERR_INVALID_ARG_TYPE('channel', ['string', 'symbol'], name);
  }

  return new Channel(name);
}

function subscribe(name, subscription) {
  return channel(name).subscribe(subscription);