Variable: ev

const ev: EventEmitter2

This is the library's event emitter. Use this to listen to internal events of the library like so:

ev.on('event', callback)

The event you want to listen to is in the format of [namespace].[sessionId]

The event can include wildcards.

For example, to listen to all qr code events, the event will be qr.**. e.g:

ev.on('qr.**',...

Listen to all sessionData events

ev.on('sessionData.**',...

Listen to all events from session1

ev.on('**.session1',...

Listen to all events

ev.on('**.**',...

ev always emits data, sessionId and the namespace which is helpful to know if there are multiple sessions or you're listening to events from all namespaces

ev.on('**.**', (data, sessionId, namespace) => {

 console.log(`${namespace} event detected for session ${sessionId}`, data)

});