MVVM - view logic: view vs viewmodel

Question

Where should logic usually look? In the view (including the code behind) or in the viewmodel?

According to the logic I understand everything that is used to change the presentation (making it dynamic), changing the properties of elements: Visibility, IsEnabled, Contentetc. based on some conditions.

I am trying to select the correct operator:

• ViewModel is responsible for all the properties of the view, if the view requires some logic - this should be the task of the viewmodel.

• View is a view in the form of a viewmodel, the viewmodel requires only the minimum for the model to be exposed, so the logic should be part of the view.

Logic in the view.

Example to display some text:

<Grid Visibility="{Binding TextAvailable, Converter=...}">
    <TextBlock Text="{Binding Text}" Visibility="{Binding TextOk, Converter=...}" />
</Grid>

xaml, , viewmodel 2 : TextAvailable TextOk, Text.

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Xaml :

<TextBlock Text="{Binding Text}" Visibility="{Binding ShowText, Converter=...}" />

:

public bool ShowText => TextAvailable && TextOk;

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---

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Answer 1

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Answer 2

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