How can I check session is connected or not (is session active/connected)? in solclientjs

Hi @prashantk2000 - I am sure you might have already checked out the nodejs samples; if not, please refer to any of the nodejs samples in the tutorials sections.

sample.session.on(solace.SessionEventCode.UP_NOTICE, function (sessionEvent) {
    sample.log('=== Successfully connected and ready to start the message consumer. ===');
    sample.startConsume();
});
sample.session.on(solace.SessionEventCode.CONNECT_FAILED_ERROR, function (sessionEvent) {
   sample.log('Connection failed to the message router: ' + sessionEvent.infoStr +
	                ' - check correct parameter values and connectivity!');
});
sample.session.on(solace.SessionEventCode.DISCONNECTED, function (sessionEvent) {
   sample.log('Disconnected.');
   sample.consuming = false;
   if (sample.session !== null) {
      sample.session.dispose();
      sample.session = null;
   }
});

The Solace Node.js API communicates changes in status and results of connect and subscription calls through emitting session events with certain event names. The client can register callbacks to receive these SessionEvent and take necessary action. And you can control session connection-related parameters via SessionProperties your createSession call.

I hope this helps - if your query is different, please elaborate.