svelte-os-themes/dist/parseTheme.js

[](https://svelte-os-themes.vercel.app)

export function parseTheme(value, fallback) {
    if (typeof value !== 'string')
        return fallback;
    value = value.toLowerCase().trim();
    if (value === 'dark')
        return 'dark';
    if (value === 'light')
        return 'light';
    if (value === 'system')
        return 'system';
    return fallback;
}