NZ Select doesn't select the option that has nzValue=undefined and the ngModel value is also `undefined`

Reproduction link

https://stackblitz.com/edit/angular-sjwmqy?file=src/app/app.component.ts

Steps to reproduce

Create a nz-select with an option that has the [nzValue]=undefined. Set the [(ngModel)] for the nz-select to a variable that has the value undefined

What is expected?

It is expected the nz-select to select the option with the [nzValue]=undefined

What is actually happening?

No options are selected

Environment	Info
ng-zorro-antd	10.0.2
Browser	*

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As a side node, the HMTL select element works as expected

[Alegiter]

What about “null” as nzValue? It should be considered as value

In @IonelLupu repro “null” behaves like “undefined”

@vthinkxie here is a repro link You can see the option selected by angular, which is the “All” option and the option selected by zorro, which is none. Both are using the same ngModel

I can drop nz-select value to “null” with nzAllowClear, but nz-option with nzValue=null don`t map

I really need this feature)

[sorahn]

@vthinkxie we’ve had this problem too with using null as the value, and wanting to “reset” the select back to having a null value.