Drawer: loses sliding transition after exiting fullScreen mode

[itismohammadreza]

Describe the bug

When enabling the fullScreen mode for the drawer component at runtime, the component transitions correctly with the fullscreen behavior (using opacity). However, when fullScreen is set to false afterward, the component fails to return to its sliding transition. Instead, it retains the opacity-based transition used for the fullscreen mode, resulting in an inconsistent user experience.

Pull Request Link

No response

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

No response

Reproducer

https://stackblitz.com/edit/cjwth51q?file=src%2Fapp%2Fimports.ts,src%2Fapp%2Fdrawer-basic-demo.html,src%2Fapp%2Fdrawer-basic-demo.ts

Environment

windows

Angular version

19

PrimeNG version

v19

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

1. Render the drawer component with fullScreen set to false.
2. Change the fullScreen property to true during runtime.
3. Observe the fullscreen transition (opacity-based).
4. Set the fullScreen property back to false.

Expected behavior

When exiting the fullscreen mode (fullScreen set to false), the drawer should seamlessly revert to the sliding transition.