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id: 57c8d465-3738-4148-892a-cbb80b08552a
title: Events
slug: /js/reference/pubsub/client/events
max-toc-depth: 3
----------------

The PubSub.Client object emits the events listed below. You can work with these events using the following methods:

<CardGroup>
  <Card title="on" href="/docs/browser-sdk/v3/js/reference/pubsub/client/on">
    Subscribe to an event
  </Card>

  <Card title="once" href="/docs/browser-sdk/v3/js/reference/pubsub/client/once">
    Subscribe to an event once
  </Card>

  <Card title="off" href="/docs/browser-sdk/v3/js/reference/pubsub/client/off">
    Unsubscribe from an event
  </Card>

  <Card title="removeAllListeners" href="/docs/browser-sdk/v3/js/reference/pubsub/client/remove-all-listeners">
    Remove all event listeners
  </Card>
</CardGroup>

## Events

### message

* **message**(`message`)

A new message has been received.

<Accordion title="Properties">
  <ParamField path="message" type="PubSubMessage<PubSubMessageContract>" required={true}>
    The received message. See [`PubSubMessage`](/docs/browser-sdk/v3/js/reference/pubsub) for more details.
  </ParamField>
</Accordion>

***

### session.expiring

* **session.expiring**()

The session is going to expire. Use the [updateToken](/docs/browser-sdk/v3/js/reference/pubsub/client/update-token) method to refresh your token.