@@ -20,6 +20,7 @@
  * External dependencies
  */
 import invariant from 'invariant';
+import { detectAnyAdblocker } from 'just-detect-adblock';
 
 /**
  * Internal dependencies
/**
 * `modules/adsense` data store: adblocker.
 *
 * Site Kit by Google, Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * External dependencies
 */
import invariant from 'invariant';

/**
 * Internal dependencies
 */
import Data from 'googlesitekit-data';
import { STORE_NAME } from './constants';

// Actions
const RECEIVE_IS_ADBLOCKER_ACTIVE = 'RECEIVE_IS_ADBLOCKER_ACTIVE';

export const initialState = {
	isAdBlockerActive: undefined,
};

export const actions = {
	receiveIsAdBlockerActive( isAdBlockerActive ) {
		invariant( 'boolean' === typeof isAdBlockerActive, 'isAdBlockerActive must be boolean.' );
		return {
			payload: { isAdBlockerActive },
			type: RECEIVE_IS_ADBLOCKER_ACTIVE,
		};
	},
};

export const controls = {};

export const reducer = ( state, { payload, type } ) => {
	switch ( type ) {
		case RECEIVE_IS_ADBLOCKER_ACTIVE: {
			const { isAdBlockerActive } = payload;

			return {
				...state,
				isAdBlockerActive,
			};
		}

		default: {
			return state;
		}
	}
};

export const resolvers = {
	*isAdBlockerActive() {
		const registry = yield Data.commonActions.getRegistry();
		const isAdBlockerActive = registry.select( STORE_NAME ).isAdBlockerActive();

		// If ad blocker status was already detected, consider it fulfilled
		// and don't check the global.
		if ( undefined !== isAdBlockerActive ) {
			return;
		}

		// Global is set by ads.js entry point script.
		const canAdsRun = global._googlesitekitLegacyData && global._googlesitekitLegacyData.canAdsRun;

		yield actions.receiveIsAdBlockerActive( ! canAdsRun );
	},
};

export const selectors = {
	/**
	 * Returns whether an ad blocker is active on the client.
	 *
	 * @since 1.9.0
	 *
	 * @param {Object} state Data store's state.
	 * @return {boolean|undefined} True or false depending on whether an ad blocker is active; `undefined` if not loaded.
	 */
	isAdBlockerActive( state ) {
		const { isAdBlockerActive } = state;

		return isAdBlockerActive;
	},
};

export default {
	initialState,
	actions,
	controls,
	reducer,
	resolvers,
	selectors,
};

Even though it uses this library here, this could easily be replaced with something else as there are a few that work very similarly. This one seems to be one of the newer ones and seems to work well. If needed we could always fork one of these as an internal package to tweak for our needs. Part of the issue here is a proof of concept that since our use is encapsulated within the datastore and connected components, we can rely on on-demand asynchronous logic rather than running this on every page load proactively.