v3/packages/misc-utils/featureFlags/react/FeatureFlags.tsx

import * as React from 'react';

export enum FeatureFlag {
    AllowListsBlockLists = 'AllowListsBlockLists',
}

export class FeatureFlagProvider {
    activeFlags: FeatureFlag[] = [];

    constructor(flags: FeatureFlag[] = []) {
        this.activeFlags = flags;
    }

    has(flag: FeatureFlag) {
        return this.activeFlags.includes(flag);
    }
}

export const FeatureFlagsContext = React.createContext(new FeatureFlagProvider());