$app/env

还没翻译译自英文（svelte.dev）本页 9 段都还没译

import { browser, building, dev, version } from '$app/env';

browser

true if the app is running in the browser.

const browser: boolean;

SvelteKit analyses your app during the build step by running it. During this process, building is true. This also applies during prerendering.

const building: boolean;

Whether the dev server is running. This is not guaranteed to correspond to NODE_ENV or MODE.

const dev: boolean;

The value of config.version.name.

const version: string;