[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Network](./puppeteer.protocol.network.md) > [EventSourceMessageReceivedEvent](./puppeteer.protocol.network.eventsourcemessagereceivedevent.md) > [eventId](./puppeteer.protocol.network.eventsourcemessagereceivedevent.eventid.md) ## Protocol.Network.EventSourceMessageReceivedEvent.eventId property Message identifier. Signature: ```typescript eventId: string; ```