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

<Page>
  <ScrollView>
    <StackLayout>
      <WrapLayout>
        <Label text="labelLabel" style="letter-spacing: -0.1;" />
        <Label text="labelLabel" style="letter-spacing: 0;" />
        <Label text="labelLabel" style="letter-spacing: 0.1;" />
        <Label>
            <Span text="just bold" fontWeight="bold" />
        </Label>
      </WrapLayout>
      <Label text="labelLabel" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;" />
      <Label style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;">
        <Label.formattedText>
          <FormattedString>
            <FormattedString.spans>
              <Span text="label" fontWeight="bold" color="#0000ff" />
              <Span text="Label" fontStyle="italic" color="#00ff00" />
            </FormattedString.spans>
          </FormattedString>
        </Label.formattedText>
      </Label>
      <WrapLayout>
        <Button text="buttonButton" style="letter-spacing: -0.1;" />
        <Button text="buttonButton" style="letter-spacing: 0;" />
        <Button text="buttonButton" style="letter-spacing: 0.1;" />
      </WrapLayout>
      <Button text="buttonButton" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;" />
      <!--<android>-->
      <Button style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;">
        <Button.formattedText>
          <FormattedString>
            <FormattedString.spans>
              <Span text="button" fontWeight="bold" color="#0000ff" />
              <Span text="Button" fontStyle="italic" color="#00ff00" />
            </FormattedString.spans>
          </FormattedString>
        </Button.formattedText>
      </Button>
      <!--</android>-->
      <WrapLayout>
        <TextField text="textField" autocorrect="false" style="letter-spacing: -0.1;" />
        <TextField text="textField" autocorrect="false" style="letter-spacing: 0;" />
        <TextField text="textField" autocorrect="false" style="letter-spacing: 0.1;" />
      </WrapLayout>
      <TextField text="textField" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;" />
      <!--<android>-->
      <TextField autocorrect="false" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;">
        <TextField.formattedText>
          <FormattedString>
            <FormattedString.spans>
              <Span text="text" fontWeight="bold" color="#0000ff" />
              <Span text="Field" fontStyle="italic" color="#00ff00" />
            </FormattedString.spans>
          </FormattedString>
        </TextField.formattedText>
      </TextField>
      <!--</android>-->
      <WrapLayout>
        <TextView autocorrect="false" text="textView" style="letter-spacing: -0.1;" />
        <TextView autocorrect="false" text="textView" style="letter-spacing: 0;" />
        <TextView autocorrect="false" text="textView" style="letter-spacing: 0.1;" />
      </WrapLayout>
      <TextView autocorrect="false" text="textView" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;" />
      <!--<android>-->
      <TextView autocorrect="false" style="text-transform: uppercase; text-decoration: underline line-through;letter-spacing: 0.1;">
        <TextView.formattedText>
          <FormattedString>
            <FormattedString.spans>
              <Span text="text" fontWeight="bold" color="#0000ff" />
              <Span text="View" fontStyle="italic" color="#00ff00" />
            </FormattedString.spans>
          </FormattedString>
        </TextView.formattedText>
      </TextView>
      <!--</android>-->
    </StackLayout>
  </ScrollView>
</Page>