yandex-js-sdk

Integrates the Yandex Games JavaScript SDK (YaGames) into JavaScript games. Initializes the SDK and lifecycle hooks, manages player authentication and authorization, handles per-player cloud storage, controls ad placements (interstitial, rewarded video, sticky banner), implements in-app purchases and leaderboards, retrieves remote config flags, and supports social features such as review prompts and home-screen shortcuts. Use when the user mentions Yandex Games, YaGames, yandex sdk, deploying a game to the Yandex.Games platform, or integrating features like ads, leaderboards, in-app purchases, or player authentication into a Yandex-hosted JavaScript game.

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Yandex Games JavaScript SDK

Overview

Yandex Games loads games inside a frame on yandex.<tld>/games. The host injects the YaGames global once the SDK script is loaded. Key capability areas:

Lifecycle & environment: init, LoadingAPI.ready(), GameplayAPI.start/stop, pause/resume events, device info, language/TLD
Player & storage: authorization, profile data, per-player key/value cloud storage
Monetization: fullscreen interstitial, rewarded video, sticky banner ads, in-app purchases
Engagement: leaderboards, remote config flags, review prompt, add-to-home-screen shortcut, server time, clipboard write, cross-promotion via GamesAPI

The SDK does NOT expose social share, invite-friends, community-join, add-to-favorites, achievements, or stat counters.

Installation

<script src='https://yandex.ru/games/sdk/v2'></script>

If loaded dynamically, poll until window.YaGames && window.YaGames.init is defined before calling init().

Quick Start / Integration Workflow

Follow this sequence when wiring up the SDK for the first time. Verify each step before proceeding to the next.

async function bootstrap() {
    // 1. Ensure SDK script has loaded
    if (!window.YaGames?.init) {
        throw new Error('YaGames SDK not available — check that the script tag loaded')
    }

    // 2. Initialize — all subsequent SDK calls require ysdk
    const ysdk = await window.YaGames.init()

    // 3. Bind host-driven pause / resume before anything else
    ysdk.on('game_api_pause', () => { /* mute audio, pause gameplay */ })
    ysdk.on('game_api_resume', () => { /* unmute, resume */ })

    // 4. Signal that the loading screen is gone
    ysdk.features.LoadingAPI?.ready()

    // 5. Read environment (language, device type)
    const env = readEnvironment(ysdk)

    // 6. Fetch player — fall back to guest mode if not authorized
    let player = null
    let storageCache = {}
    try {
        const info = await getPlayer(ysdk)
        player = info.raw
        if (info.isAuthorized) {
            storageCache = await loadStorage(player)
        }
    } catch (err) {
        console.warn('Player init failed, continuing as guest:', err)
    }

    // 7. Start gameplay tracking
    onGameplayStarted(ysdk)

    return { ysdk, player, storageCache, env }
}

function readEnvironment(ysdk) {
    return {
        language: ysdk.environment.i18n.lang.toLowerCase(),
        tld: ysdk.environment.i18n.tld.toLowerCase(),
        deviceType: ysdk.deviceInfo.type, // 'desktop' | 'mobile' | 'tablet' | 'tv'
    }
}

Player / Authorization

async function getPlayer(ysdk, { useSignedData = false } = {}) {
    const player = await ysdk.getPlayer({ signed: useSignedData })

    return {
        raw: player,
        id: player.getUniqueID(),
        name: player.getName() || null,
        photos: ['small', 'medium', 'large']
            .map((size) => player.getPhoto(size))
            .filter(Boolean),
        isAuthorized: player.isAuthorized(),
        payingStatus: player.getPayingStatus(),
        signature: useSignedData ? player.signature : null,
    }
}

async function authorizePlayer(ysdk, options) {
    const current = await getPlayer(ysdk, options)
    if (current.isAuthorized) {
        return current
    }

    await ysdk.auth.openAuthDialog()
    return getPlayer(ysdk, options)
}

Storage

Every call writes the full document — there is no per-key API. Cache the latest snapshot client-side and merge before each save. Fall back to localStorage for guests.

async function loadStorage(player) {
    return player.getData()
}

async function setStorage(player, cache, key, value) {
    const data = { ...(cache || {}) }
    if (Array.isArray(key)) {
        for (let i = 0; i < key.length; i++) {
            data[key[i]] = value[i]
        }
    } else {
        data[key] = value
    }
    await player.setData(data)
    return data
}

async function deleteStorage(player, cache, key) {
    const data = { ...(cache || {}) }
    if (Array.isArray(key)) {
        for (let i = 0; i < key.length; i++) {
            delete data[key[i]]
        }
    } else {
        delete data[key]
    }
    await player.setData(data)
    return data
}

function getCached(cache, key) {
    if (Array.isArray(key)) {
        return key.map((k) => (typeof cache?.[k] === 'undefined' ? null : cache[k]))
    }
    return typeof cache?.[key] === 'undefined' ? null : cache[key]
}

Fullscreen interstitial

onClose(wasShown) fires on both normal close and SDK-skipped ads. Treat wasShown === false as a failure.

function showInterstitial(ysdk, handlers = {}) {
    ysdk.adv.showFullscreenAdv({
        callbacks: {
            onOpen: () => handlers.onOpen?.(),
            onClose: (wasShown) => handlers.onClose?.(wasShown),
            onError: (err) => handlers.onError?.(err),
        },
    })
}

Rewarded video

Grant the reward inside onRewarded. onClose fires after the ad UI is dismissed.

function showRewarded(ysdk, handlers = {}) {
    ysdk.adv.showRewardedVideo({
        callbacks: {
            onOpen: () => handlers.onOpen?.(),
            onRewarded: () => handlers.onRewarded?.(),
            onClose: () => handlers.onClose?.(),
            onError: (err) => handlers.onError?.(err),
        },
    })
}

Sticky banner

async function getBannerStatus(ysdk) {
    return ysdk.adv.getBannerAdvStatus() // { stickyAdvIsShowing: boolean, reason?: string }
}

async function showBanner(ysdk) {
    const data = await ysdk.adv.showBannerAdv()
    return data.stickyAdvIsShowing === true
}

async function hideBanner(ysdk) {
    const data = await ysdk.adv.hideBannerAdv()
    return data.stickyAdvIsShowing === false
}

Payments / IAP

Obtain the payments object once after init. Pass signed: true for backend signature validation.

async function initPayments(ysdk, { signed = true } = {}) {
    return ysdk.getPayments({ signed })
}

Catalog

async function getCatalog(payments) {
    const products = await payments.getCatalog()
    return products.map((p) => ({
        id: p.id,
        title: p.title,
        description: p.description,
        imageURI: p.imageURI,
        price: p.price,
        priceValue: p.priceValue,
        priceCurrencyCode: p.priceCurrencyCode,
        priceCurrencyImage: p.getPriceCurrencyImage?.('medium'),
    }))
}

Purchase

async function purchase(payments, productId, payload) {
    const result = await payments.purchase({ id: productId, developerPayload: payload })
    if (!result?.purchaseData?.purchaseToken) {
        throw new Error(`Purchase succeeded but returned no purchaseToken for product ${productId}`)
    }
    return { id: productId, ...result.purchaseData }
}

Owned purchases

async function getPurchases(payments) {
    const list = await payments.getPurchases()
    return list.map((purchase) => ({ id: purchase.productID, ...purchase.purchaseData }))
}

Consume

Verify the item was granted before consuming. A failed consume leaves the token intact for retry.

async function consumePurchase(payments, purchaseToken) {
    if (!purchaseToken) {
        throw new Error('consumePurchase: purchaseToken is required')
    }
    await payments.consumePurchase(purchaseToken)
}

Leaderboards

Boards are configured in the developer console and referenced by string id. Setting a score requires an authorized player.

async function setLeaderboardScore(ysdk, leaderboardId, score) {
    const lb = await ysdk.getLeaderboards()
    await lb.setLeaderboardScore(leaderboardId, score)
}

async function getLeaderboardEntries(ysdk, leaderboardId, { isPlayerAuthorized = false } = {}) {
    const lb = await ysdk.getLeaderboards()

    const options = { quantityTop: 20 }
    if (isPlayerAuthorized) {
        options.includeUser = true
        options.quantityAround = 3
    }

    const result = await lb.getLeaderboardEntries(leaderboardId, options)
    if (!result || result.entries.length === 0) {
        return []
    }

    return result.entries.map((e) => ({
        id: e.player.uniqueID,
        name: e.player.publicName,
        score: e.score,
        rank: e.rank,
        photo: e.player.getAvatarSrc('large'),
    }))
}

Remote config

ysdk.getFlags(options) returns a flat { key: stringValue } map.

async function getRemoteConfig(ysdk, options = {}) {
    const params = { clientFeatures: [], ...options }
    return ysdk.getFlags(params)
}

Server time

function getServerTime(ysdk) {
    // Returns Unix timestamp in milliseconds
    return ysdk.serverTime()
}

Social

Review prompt

async function requestReview(ysdk) {
    const can = await ysdk.feedback.canReview()
    if (!can.value) {
        throw new Error(can.reason || 'review not available')
    }
    const { feedbackSent } = await ysdk.feedback.requestReview()
    return feedbackSent
}

Add to home screen (shortcut)

async function canAddToHomeScreen(ysdk) {
    const prompt = await ysdk.shortcut.canShowPrompt()
    return prompt.canShow === true
}

async function addToHomeScreen(ysdk) {
    const result = await ysdk.shortcut.showPrompt()
    return result.outcome === 'accepted'
}

Clipboard

async function clipboardWrite(ysdk, text) {
    await ysdk.clipboard.writeText(text)
}

Gameplay lifecycle, pause and audio

Bracket every active gameplay session with GameplayAPI.start() / GameplayAPI.stop() to drive ad pacing and analytics.

function onGameplayStarted(ysdk) {
    ysdk.features.GameplayAPI?.start()
}

function onGameplayStopped(ysdk) {
    ysdk.features.GameplayAPI?.stop()
}

function bindPauseHandlers(ysdk, { onPause, onResume }) {
    ysdk.on('game_api_pause', () => onPause?.())
    ysdk.on('game_api_resume', () => onResume?.())
}

Visibility/focus changes not announced by Yandex should still be handled with document.visibilitychange, window.blur, and window.focus alongside these SDK callbacks.

Catalog of other Yandex Games (optional)

features.GamesAPI is gated on availability per game; check for the namespace before calling it.

async function getAllGames(ysdk) {
    const { games } = await ysdk.features.GamesAPI.getAllGames()
    return games
}

async function getGameById(ysdk, gameId) {
    const { game, isAvailable } = await ysdk.features.GamesAPI.getGameByID(gameId)
    return { ...game, isAvailable }
}

Repository: popey/gamedev.sh-skills
Path: yandex-js-sdk/SKILL.md
Commit: 1adb800

Last updated: 1 day ago
First committed: 4 months ago

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