Canvas Developer Guide
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Controller
If your Visualforce page contains a canvas app, you can use methods in the Controller object to publish an
event that the canvas app subscribes to. It contains these methods:
| Method | Signature | Description |
|---|---|---|
| publish | publish(String name, Object payload [, String[] target]) | Used to publish an event that the canvas app subscribes to. The target parameter is optional. It can contain a single canvas app name or an array of canvas app names. |
| resize | resize(String height, String width, String target) | Used by a Visualforce page to resize a canvas app iFrame. |
| subscribe | subscribe(Subscriber event) | Used by a Visualforce page to subscribe to events that the canvas app might publish. |
| unsubscribe | unsubscribe(Unsubscriber event) | Used by a Visualforce page to unsubscribe to parent events that the canvas app might publish. |