小编MOH*_*I K的帖子

您好，请帮帮我....感谢您的回复.................................通知许可的确。; FirebaseError：消息传递：我们无法注册默认服务工作人员。无法注册 ServiceWorker：获取脚本时收到错误的 HTTP 响应代码 (404)。（消息传递/serviceworker 注册失败）。

  <script src="https://www.gstatic.com/firebasejs/5.5.3/firebase-auth.js"></script>

    <script>
        MsgElem = document.getElementById("msg")
        TokenElem = document.getElementById("token")
        NotisElem = document.getElementById("notis")
        ErrElem = document.getElementById("err")
        // Initialize Firebase
        // TODO: Replace with your project's customized code snippet
         var config = {
             apiKey: "AIzaSyBle95lld9XUBB5P-sn2vFciSxcIny-RQs",
             authDomain: "swapnear-f82dd.firebaseapp.com",
             databaseURL: "https://swapnear-f82dd.firebaseio.com",
             projectId: "swapnear-f82dd",
             storageBucket: "swapnear-f82dd.appspot.com",
             messagingSenderId: "390359777744"
         };
         firebase.initializeApp(config);

        const messaging = firebase.messaging();
        messaging
            .requestPermission()
            .then(function () {
                MsgElem.innerHTML = "Notification permission granted." 
                console.log("Notification permission granted.");

                // get the token in the form of promise
                return messaging.getToken() …