NativeScript/nativescript-core/ui/text-base/text-base-interfaces.ts

export type WhiteSpace = 'initial' | 'normal' | 'nowrap';
export type TextAlignment = 'initial' | 'left' | 'center' | 'right';
export type TextTransform = 'initial' | 'none' | 'capitalize' | 'uppercase' | 'lowercase';
export type TextDecoration = 'none' | 'underline' | 'line-through' | 'underline line-through';