30 lines
995 B
TypeScript
30 lines
995 B
TypeScript
import type { Lang } from './types';
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export interface Settings {
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lang: Lang;
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textScale: 100 | 125 | 150;
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highContrast: boolean;
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reduceMotion: boolean;
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}
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export const defaultSettings = (lang: Lang): Settings => ({
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lang, textScale: 100, highContrast: false, reduceMotion: false,
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});
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export function isSettings(v: unknown): v is Settings {
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if (typeof v !== 'object' || v === null) return false;
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const s = v as Record<string, unknown>;
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return (
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(s.lang === 'pl' || s.lang === 'en') && (s.textScale === 100 || s.textScale === 125 || s.textScale === 150) &&
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typeof s.highContrast === 'boolean' && typeof s.reduceMotion === 'boolean'
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);
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}
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/** Applies display settings to the document root. */
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export function applySettings(s: Settings) {
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const root = document.documentElement;
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root.lang = s.lang;
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root.style.fontSize = `${s.textScale}%`;
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root.dataset.contrast = s.highContrast ? 'high' : 'default';
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root.dataset.motion = s.reduceMotion ? 'reduce' : 'default';
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}
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