p-inputnumber: multiple problems when input number looses focus

[rosenthalj]

Describe the bug

The following problems occur when p-inputnumber looses focus (on blur)

1. If the p-inputNumber field is empty and looses focus, a null pointer exception occurs
2. If the p-inputNumber field has a value and looses focus, the model value is changed from a "number' to a "string"

The following video is of the PrimeNG p-inputnumber v17.10.0 demo and shows issue 1)

inputNumberNullPointerException.mov

The following video is of the reproducer I created and shows issue 2)

inputNumberFocusChangesModelFromNumberToString.mov

I believe this bug was caused by PR #14871

Environment

windows and mac os

Reproducer

https://stackblitz.com/edit/h7br3x

Angular version

17.2.2

PrimeNG version

17.10.0

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

21.4.0

Browser(s)

chrome, firefox, and safari

Steps to reproduce the behavior

To reproduce issue 1)

1. In any browser, open the console
2. Run the PrimeNG numeral demo: http://localhost:62382/inputnumber#numeral
3. clear any of the input files and then tab out of the field
4. examine the console window, a null pointer exception will be displayed (bad)

To reproduce issue 2)

1. run the reproducer: https://stackblitz.com/edit/h7br3x
2. Set focus to the p-inputNumber field
   -- "Input value" will be the same value as the p-inputNumber field (good)
   -- "Input value type" will be "number" and have a green background color (good)
3. Tab out of the field
   -- "Input value" will be the same value as the p-inputNumber field (good)
   -- "Input value type" will be "string" and have a red background color (bad)

Expected behavior

For issue 1), no exception should be generated
For issue 2), the input value type should not change from a number to a string

[cetincakiroglu]

This issue supersedes the related issues below:

• p-inputNumber: onInputBlur NPE #14928
• p-inputNumber: output type changed to string from number #15017