Canvas Developer Guide

Introducing Canvas
Quick Start
Quick Start—Advanced
Canvas SDK
Canvas Apps and Visualforce Pages
Visualforce Page Code Examples
Visualforce Considerations
apex:canvasApp Component
Using Events between a Visualforce Page and a Canvas App
Publishing a Canvas Event from a Visualforce Page
Resizing a Canvas App in a Visualforce Page
Subscribing to Events
Unsubscribing from Events in a Visualforce Page
Lightning Component Code Examples
Canvas Apps in a Page Layout or a Mobile Card
Canvas Apps in the Publisher
Canvas Apps in the Chatter Feed
Canvas in the Salesforce Mobile App
Customizing Your App Lifecycle
Objects
Canvas Limits
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Unsubscribing from Events in a Visualforce Page

The following code example shows how to call the unsubscribe method within a Visualforce page to unsubscribe from two events.

1Sfdc.canvas.controller.unsubscribe(['mynamespace.myevent2', 'mynamespace.myevent2']);