First, initialize chat
You must initialize with `
KustomerCore.init()` before you can execute any additional Core SDK methods
## Examples
## Syntax
| Parameter | Type | Description |
| options | Object | **Optional**
An object containing details about the messages you want to fetch. A breakdown of the `options` object is listed below. |
| function(callbackResponse, error) | Function | **Optional**
A callback that is run after `KustomerCore.getHistoricalMessages()` completes.
**callbackResponse** is an object returned to the callback function. See the `callbackResponse` section below to see the properties of the object.
**error** is either `undefined` or a native JavaScript Error object. |
## `options`
| Property | Type | Description |
| conversationId | String | **Required** The unique ID of the conversation that you are fetching message history for. |
| count | Number | **Optional** The number of messages you want to fetch. The default value is 25. |
| before | Date-time | **Optional** Fetch messages before a given date. This is a ISO formatted string, for example, YYYY-MM-DDTHH:MM:SS.SSSZ |
### `callbackResponse`
| Property | Type | Description |
| messages | Array | **Required** A list of messages found on that conversation. See **messages** below for an example of what this looks like. |
| satisfaction | Object | **Optional** An object with details about the satisfaction form message in this conversation. See **satisfaction** below for an example of what this looks like. |
### `messages`
### `satisfaction`