Using a slider requires the Slider module. {%snippet article-require-slider%}

<Page loaded="pageLoaded">
 <StackLayout orientation="vertical">
   {%raw%}<Progress value="{{ someProperty }}" />
   <Slider value="{{ someProperty }}" />{%endraw%}
 </StackLayout>
</Page>

{%snippet article-binding-slider-properties%}

{%snippet article-creating-slider%}

{%snippet article-setting-slider-values%}

{%snippet article-binding-value-property%}