Canvas Developer Guide

Getting Started
Using Canvas
Reference
Objects
CanvasRequest
Client
Context
Application
Environment
Dimensions
Record
Parameters
Version
Links
Organization
User
Controller
SignedRequest
Canvas Limits
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Parameters

The Parameters object is a JSON-formatted object containing context information specified by the developer. The Parameters object is specified in a Visualforce page by using the parameters tag in the apex:canvasApp component, or in a Chatter canvas feed item by using the parameters variable when creating the feed item.

The following code snippet shows an example of the Parameters object.