SvelteKit • Reference

$app/env

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browser
dev
building
version

This is an alias of $app/environment, used when explicit environment variables are enabled.

import {
	const browser: booleantrue if the app is running in the browser.const browser: booleantrue if the app is running in the browser.browser,
	const building: booleanSvelteKit analyses your app during the build step by running it. During this process, building is true. This also applies during prerendering.const building: booleanSvelteKit analyses your app during the build step by running it. During this process, building is true. This also applies during prerendering.building,
	const dev: booleanWhether the dev server is running. This is not guaranteed to correspond to NODE_ENV or MODE.const dev: booleanWhether the dev server is running. This is not guaranteed to correspond to NODE_ENV or MODE.dev,
	const version: stringThe value of config.kit.version.name.const version: stringThe value of config.kit.version.name.version
} from '$app/env';

browser

true if the app is running in the browser.

export const browser: boolean;

dev

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

export const dev: boolean;

building

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

export const building: boolean;

version

The value of config.kit.version.name.

export const version: string;