# Changelog

## Version 4.0.1

### Bug Fixes

1. Fixed overlay position x,y issue.

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## Version 4.0.0

### Breaking Changes

1. The default value for `transformationPosition` is now `query` instead of `path`. This change enables wildcard cache purging to remove CDN cache for all generated transformations.

   **Action Required:**  
   If you're using the `transformationPosition` parameter in the `url` method and want to apply transformations in the path, you must now explicitly set the value to `path`. The default is `query`.

2. Removed the following deprecated parameters:  
   `effectSharpen`, `effectUSM`, `effectContrast`, `effectGray`, `effectShadow`, `effectGradient`, and `rotate`.

### Other Changes

1. Native support for overlays has been added. See the README for usage examples.
2. New AI-powered transformations are now supported:  
   `aiRemoveBackground`, `aiUpscale`, `aiVariation`, `aiDropShadow`, `aiChangeBackground`, and more.  
   *(Introduced in version 3.1.0)*

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## SDK Version 3.0.0

### Breaking Changes

- **Overlay Syntax Update**  
  In version 3.0.0, the old overlay syntax parameters for transformations (e.g., `oi`, `ot`, `obg`, and others as detailed [here](https://imagekit.io/docs/add-overlays-on-images)) have been removed. These parameters are deprecated and will now return errors when used in URLs.

  **Action Required:**  
  Migrate to the new layers syntax which supports overlay nesting, offers improved positional control, and allows more transformations at the layer level. For a quick start, refer to the [examples](https://imagekit.io/docs/add-overlays-on-images). Use the `raw` transformation parameter to implement this migration.

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## SDK Version 2.0.0

### Breaking Changes

- **Authentication Process Update**  
  Previously, client-side file uploads required the SDK to be initialized with both the `publicKey` and `authenticationEndpoint` to fetch security parameters (`signature`, `token`, and `expire`).

  **Action Required:**  
  With version 2.0.0, you must now generate the security parameters (`signature`, `token`, and `expire`) yourself, eliminating the need for the `authenticationEndpoint`. When invoking the SDK's upload method, be sure to include these parameters along with other [upload options](https://imagekit.io/docs/api-reference/upload-file/upload-file#Request). For further details, consult the documentation [here](https://imagekit.io/docs/api-reference/upload-file/upload-file#how-to-implement-client-side-file-upload).