Dropdown: Missing placeholder triggers unexpected ngModelChange

[stanislavKacmarik]

Describe the bug

p-dropdown behaves non consistent - when attribute placeholder is present, then ngModelChange is not triggered during its initalization, but its triggered when placeholder is missing (or its value is empty string).
Even when value bound for ngModel is changed automatically from code, p-dropdown without placeholder will trigger ngModelChange, but p-dropdown with placeholder is not triggering ngModelChange. In provided demo this change occurs after 5 seconds after component initialization.

Environment

17.14.1

Reproducer

https://stackblitz.com/edit/rsoiam-gmp8s3?file=src%2Fapp%2Fdemo%2Fdropdown-basic-demo.html

Angular version

17.3.1

PrimeNG version

17.14.1

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

v18.16.0

Browser(s)

Chrome 124

Steps to reproduce the behavior

Create 1 p-dropdown with placeholder and another without and compare differences when ngModelChange is triggered. After that, automatically update value, and see differences between dropdown with and without placeholder

Expected behavior

Absence of placeholder should not have any effects to ngModelChange, or at least this behavior should be documented

[mertsincan]

Hi,

So sorry for the delayed response! Improvements have been made to many components recently, both in terms of performance and enhancement. Therefore, this improvement may have been developed in another issue ticket without realizing it. You can check this in the documentation. If there is no improvement on this, can you open a new issue so we can include it in our roadmap?

Thanks a lot for your understanding!
Best Regards,