Backbone.JS CID()

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The Backbone.JS CID() model is used to uniquely identify the model on the client.

Syntax: 

Model.CID

Example: 

 
   
  
 Client id Example

Output: 

Before setting unique identifier ID: undefined
Before setting unique identifier CID: c1
After setting unique identifier ID: 1
After setting unique identifier CID: c2

Explanation:
CID is an automatically generated client ID by the Backbone.js, while ID is generated manually.