Regression with p-float-label and p-dropdown if selected value is falsy, but neither null, nor undefined

[j-be]

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Plunkr Case (Bug Reports)

https://github-fnjo2c.stackblitz.io

Current behavior

false and 0 are treated as empty.

Expected behavior

false and 0 are treated as themselves, and only null and undefined are treated as empty.

Minimal reproduction of the problem with instructions

• Open the https://github-fnjo2c.stackblitz.io
• See the second (false) and the fourth (0 as in "zero") option

What is the motivation / use case for changing the behavior?

This was introduced in 11.4.1 (all versions up to including 11.4.0 exhibit the expected behavior described above). As that is a minor version increment I suspect this is a regression, and not a feature.

Please tell us about your environment:

Whatever StackBlitz is running at the time of writing, so only putting it there for completeness sake. Locally discovered on:

• Angular version: 11.2.14
• PrimeNG version: >= 11.4.1
• Browser: at least the following, all on Linux Mint 20, up to date with the respective official repo at the time of writing:
  • Firefox 89.0
  • Chromium 90.0.4430.212
  • Opera 76.0.4017.177
  • Microsoft Edge Version 92.0.902.8
• Language: TypeScript 4.1.5
• Node (for AoT issues): node --version = v15.12.0

[yigitfindikli]

Duplicate #10245