DataSource Change History

=========================

3.4.0

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### datasource-polling

* `setInterval` fires first `sendRequest` in a 0ms `setTimout`, then

subsequent calls after the configured timeout. [Ticket #2529182]

### datasource-function

* success callbacks that throw an error no longer result in the `data` event

being fired again. [Ticket #2529824]

3.3.0

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* Un-anonymize `DataSource.IO` callback functions. [Ticket #2529466]

3.2.0

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* Removed hardcoded `DataSource.IO` from `DataSourceJSONSchema`.

* Added ability to cancel underlying IO and Get transactions.

* Better `DataSource` error handling.

* Added `ioConfig` Attribute to `DataSource.IO`.

3.1.1

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* No changes.

3.1.0

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* [!] `DataSource`'s `sendRequest()` argument signature has changed in a

non-backward-compatible way. It now accepts a single object containing the

properties `request`, `callback`, and `cfg`.

* `DataSource.Get` bug fixed where it was trying to delete the proxy callback

in the wrong location during cleanup.

* Changed from array of proxy callbacks to object with guid keys to support

services that don't properly handle array indexes in the callback parameter

(Twitter).

* Code reorganized (API and functionality unaffected).

3.0.0

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* `DataSource.IO` now passes request value to IO.

* `DataSource.Function` now catches exception and fires error event.

3.0.0beta1

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* Initial release.