# "For Key" Methods

#### `setValueForKey` / `getValueForKey` / `mergeValueForKey` methods <a href="#setvalueforkey--getvalueforkey--mergevalueforkey-methods" id="setvalueforkey--getvalueforkey--mergevalueforkey-methods"></a>

You can store and retrieve arbitrary data in the current Captivate instance using these methods.

The data will persist even if the project is closed and another is opened, but **will be deleted on app quit**.

* `setValueForKey` - Takes three arguments, a string key, a JavaScript map of what should be stored with that key, and a callback to be called with the results of the operation.
* `getValueForKey` - Takes two arguments, a string key and a callback to be called with the value stored with that key.
* `mergeValueForKey` - Takes three arguments, a string key, a JavaScript map that should be merged with the previous contents, and a callback to be called with the results of the operation.


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