NativeScript/apps/ui/src/css/text-transform-page.ts

import { Label } from '@nativescript/core/ui/label';
import { Button } from '@nativescript/core/ui/button';
import { TextField } from '@nativescript/core/ui/text-field';
import { TextView } from '@nativescript/core/ui/text-view';
import { Page } from '@nativescript/core/ui/page';

export function onChangeText(args) {
	const page = <Page>args.object.page;
	const lblElelemtn = <Label>page.getViewById('Label');
	const btnElement = <Button>page.getViewById('Button');
	const textFieldElement = <TextField>page.getViewById('TextField');
	const textViewElement = <TextView>page.getViewById('TextView');

	if (lblElelemtn.text === 'Change text') {
		lblElelemtn.text = btnElement.text = textFieldElement.text = textViewElement.text = 'Text changed';
	} else {
		lblElelemtn.text = btnElement.text = textFieldElement.text = textViewElement.text = 'Change text';
	}
}

export function onChangeTextTransformation(args) {
	const page = <Page>args.object.page;
	const lblElelemtn = <Label>page.getViewById('Label');
	const btnElement = <Button>page.getViewById('Button');
	const textFieldElement = <TextField>page.getViewById('TextField');
	const textViewElement = <TextView>page.getViewById('TextView');
	let style = lblElelemtn.style.textTransform;
	if (lblElelemtn.style.textTransform === 'none') {
		style = 'capitalize';
	} else if (lblElelemtn.style.textTransform === 'capitalize') {
		style = 'uppercase';
	} else if (lblElelemtn.style.textTransform === 'uppercase') {
		style = 'lowercase';
	} else if (lblElelemtn.style.textTransform === 'lowercase') {
		style = 'none';
	}

	lblElelemtn.style.textTransform = style;
	btnElement.style.textTransform = style;
	textFieldElement.style.textTransform = style;
	textViewElement.style.textTransform = style;
}