app_for_reddit/Reddit App/Managers/RedditWebViewStore.swift

import AppKit
import WebKit

@MainActor
final class RedditWebViewStore {
    static let shared = RedditWebViewStore()

    private(set) var container: RedditWebViewContainer?

    private init() {}

    func containerIfNeeded() -> RedditWebViewContainer {
        if let container {
            return container
        }

        let webView = RedditWebViewManager.makeWebView()
        let newContainer = RedditWebViewContainer(webView: webView)
        container = newContainer
        return newContainer
    }
}