Swift WKWebView Stati c страниц

Question

Я хочу создать приложение веб-просмотра stati c на Swift. HTML и CSS загружаются, но не локальные файлы javascript. (это jquery, bootstrap, popper и мои скрипты)

Я пробовал это:

    override func viewDidLoad() {
        super.viewDidLoad()
        let url = Bundle.main.url(forResource: "index", withExtension: "html", subdirectory: "assets")!
        loadJS()
        webView.loadFileURL(url, allowingReadAccessTo: url)
    }

    func loadJS() {
        let jquery = Bundle.main.url(forResource: "jquery", withExtension: "js", subdirectory: "assets/js")!
        let bootstrap = Bundle.main.url(forResource: "bootstrap", withExtension: "js", subdirectory: "assets/js")!
        let popper = Bundle.main.url(forResource: "popper", withExtension: "js", subdirectory: "assets/js")!
        let modules = Bundle.main.url(forResource: "modules", withExtension: "js", subdirectory: "assets/js")!
        do {
            let content1 = try String(contentsOfFile: jquery.path, encoding: String.Encoding.utf8)
            let content2 = try String(contentsOfFile: bootstrap.path, encoding: String.Encoding.utf8)
            let content3 = try String(contentsOfFile: popper.path, encoding: String.Encoding.utf8)
            let content4 = try String(contentsOfFile: modules.path, encoding: String.Encoding.utf8)
            let controller = WKUserContentController()
            controller.addUserScript(WKUserScript(source: content1, injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: true))
            controller.addUserScript(WKUserScript(source: content2, injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: true))
            controller.addUserScript(WKUserScript(source: content3, injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: true))
            controller.addUserScript(WKUserScript(source: content4, injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: true))
            print(controller.userScripts)
        } catch {
            print(error)
        }
    }