NativeScript/apps/ui-tests-app/css/letter-spacing.xml

<Page>
    <StackLayout>
    
      <WrapLayout>
        <Label text="labelLabel" style="letter-spacing: -1;" />
        <Label text="labelLabel" style="letter-spacing: 0;" />
        <Label text="labelLabel" style="letter-spacing: 1;" />
      </WrapLayout>
    
      <Label text="labelLabel" style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;" />
      <Label style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;">
        <Label.formattedText>
          <FormattedString>
            <FormattedString.spans>
              <Span text="label" fontAttributes="Bold" foregroundColor="#0000ff" />
              <Span text="Label" fontAttributes="Italic" foregroundColor="#00ff00" />
            </FormattedString.spans>
          </FormattedString>
        </Label.formattedText>
      </Label>

      <WrapLayout>
        <Button text="buttonButton" style="letter-spacing: -1;" />
        <Button text="buttonButton" style="letter-spacing: 0;" />
        <Button text="buttonButton" style="letter-spacing: 1;" />
      </WrapLayout>
    
      <Button text="buttonButton" style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;" />
      <!--<android>-->
        <Button style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;">
            <Button.formattedText>
            <FormattedString>
                <FormattedString.spans>
                <Span text="button" fontAttributes="Bold" foregroundColor="#0000ff" />
                <Span text="Button" fontAttributes="Italic" foregroundColor="#00ff00" />
                </FormattedString.spans>
            </FormattedString>
            </Button.formattedText>
        </Button>
      <!--</android>-->
      
      <WrapLayout>
        <TextField text="textField" style="letter-spacing: -1;" />
        <TextField text="textField" style="letter-spacing: 0;" />
        <TextField text="textField" style="letter-spacing: 1;" />
      </WrapLayout>
    
      <TextField text="textField" style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;" />
      <!--<android>-->
        <TextField style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;">
            <TextField.formattedText>
            <FormattedString>
                <FormattedString.spans>
                <Span text="text" fontAttributes="Bold" foregroundColor="#0000ff" />
                <Span text="Field" fontAttributes="Italic" foregroundColor="#00ff00" />
                </FormattedString.spans>
            </FormattedString>
            </TextField.formattedText>
        </TextField>
      <!--</android>-->

      <WrapLayout>
        <TextView text="textView" style="letter-spacing: -1;" />
        <TextView text="textView" style="letter-spacing: 0;" />
        <TextView text="textView" style="letter-spacing: 1;" />
      </WrapLayout>
    
      <TextView text="textView" style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;" />
      <!--<android>-->
        <TextView style="text-transform: uppercase; text-decoration: underline line-through; letter-spacing: 10;">
            <TextView.formattedText>
            <FormattedString>
                <FormattedString.spans>
                <Span text="text" fontAttributes="Bold" foregroundColor="#0000ff" />
                <Span text="View" fontAttributes="Italic" foregroundColor="#00ff00" />
                </FormattedString.spans>
            </FormattedString>
            </TextView.formattedText>
        </TextView>
      <!--</android>-->

    </StackLayout>
</Page>