Sveltekit Device Detector

sveltekit-device-detector

Detect device, and render view according to the detected device type.

When to use this library

This library uses a technique called user agent sniffing to detect device information. That means it works by examining the User Agent string given by a browser and comparing it to a list of browser and device names it knows about. This technique works, but has drawbacks and may or may not be the right approach, depending on what you're trying to achieve. If you need to detect a specific browser type (e.g. Chrome, Safari, Internet Explorer) or specific category of device (e.g. all iPods), this library can do that.

Flags

You can use these flags to detect the device type.

interface DeviceType {
    isMobile: boolean;
    isBrowser: boolean;
    isAndroid: boolean;
    isIOS: boolean;
    isSmartTV: boolean;
    isConsole: boolean;
    isWearable: boolean;
    isEmbedded: boolean;
    isMobileSafari: boolean;
    isChromium: boolean;
    isTablet: boolean;
    isDesktop: boolean;
    isWinPhone: boolean;
    isChrome: boolean;
    isFirefox: boolean;
    isSafari: boolean;
    isOpera: boolean;
    isIE: boolean;
    osVersion: string;
    fullBrowserVersion: string;
    browserVersion: string;
    mobileVendor: string;
    mobileModel: string;
    getUA: string;
    isEdge: boolean;
    isYandex: boolean;
    isIOS13: boolean;
    isIPad13: boolean;
    isIPhone13: boolean;
    isIPod13: boolean;
    isElectron: boolean;
    isEdgeChromium: boolean;
    isLegacyEdge: boolean;
    isWindows: boolean;
    isMacOs: boolean;
    isMIUI: boolean;
    isSamsungBrowser: boolean;
    isWebView: boolean;
    isCrawler: boolean;
}

interface DevicePayload extends DeviceType {
    browserMajorVersion?: string;
    browserFullVersion?: string;
    browserName?: string;
    engineName?: string;
    engineVersion?: string;
    osName?: string;
    osVersion: string;
    userAgent?: string;
    vendor?: string;
    model?: string;
    os?: string;
    ua?: string;
}

Installation

To install, you can use npm or yarn:

npm install sveltekit-device-detector --save

or

yarn add sveltekit-device-detector

Update your app.d.ts file to look something like:

import type { DevicePayload } from 'sveltekit-device-detector/dist/types';
// See https://kit.svelte.dev/docs#typescript
// for information about these interfaces
declare namespace App {
    interface Locals {
        deviceType: DevicePayload;
    }

    interface PageData {
        deviceType: DevicePayload;
    }

    interface Platform {}

    interface PrivateEnv {}

    interface PublicEnv {}
}

Create a +layout.server.js file at the root and returning the DeviceType from there.

/** @type {import('./$types').LayoutServerLoad} */
export const load = ({ locals }) => {
    return {
        deviceType: locals.deviceType
    };
};

You'll now have access to the deviceType data by using $page.data.deviceType or via the parent function from other +page.server.js load functions.

<script>
    import { page } from '$app/stores';
    $: deviceType = $page.data.deviceType;
</script>

Initializing

src/hooks.server.ts

import { handleDeviecDetector } from 'sveltekit-device-detector';

// You can do it like this, without passing a own handle function
export const handle = handleDeviecDetector({});

// Or pass your handle function as second argument to handleDeviecDetector

export const handle = handleSession({}, ({ event, resolve }) => {
    // event.locals is populated with the deviceType `event.locals.deviceType`

    // Do anything you want here
    return resolve(event);
});

In case you're using sequence(), do this

const deviceDetector = handleDeviecDetector({});
export const handle = sequence(deviceDetector, ({ resolve, event }) => {
    // event.locals is populated with the deviceType `event.locals.deviceType`
    // Do anything you want here
    return resolve(event);
});