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Uncaught ReferenceError: Firebase is not defined

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我在风中等你
我在风中等你 2020-12-09 16:47

I am trying to follow the tutorial on designing a database in firebase, but I am getting the following error in the JavaScript console:

Uncaught Refer

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8条回答
  • 醉话见心
    2020-12-09 17:00 

    <head>
    <script src='https://cdn.firebase.com/js/client/2.2.1/firebase.js'></script>
    <script src='https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js'></script>
    <link rel='stylesheet' type='text/css' href='/resources/tutorial/css/example.css'>
  </head>

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  • 日久生厌
    2020-12-09 17:01

    if you are using firebase web api then its very important to include core firebase SDK first in the body tag, this SDK provide firebase accessibility. as shown in image .

    ,After that we have to include all related api code . which is availible

    1 theses will helpful for you ,and it will surly solve your problem ,which is firebase is not defined ,you don't need to add any other script's

    2

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  • 生来不讨喜
    2020-12-09 17:02

    i have the issue with firebase.util lib, as Rodrigo said i think is problem of the versión.

    Before:

        var ref = new Firebase('url');

    Now:

        firebase.initializeApp(config);

    As the firebase object is defined differently it does not find it. In my case, I need to update the library to be compatible with version 3.0 of firebase. I do not think it's a good idea to use the old library, to get out of step is fine but will have to update the codes to version 3. If no one has done yet may be our opportunity to contribute to the community.

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  • 梦毁少年i
    2020-12-09 17:04

    I had the same issue when installed firebase via "ionic add firebase". This added firebase version 3.2.0. Then, while looking for answers I tried the cdn with version 2.4.2 and the error disappeared, so I figured out the version downloaded via ionic was what caused the error, so I downloaded the 2.4.2 version and now it works.

    Hope this helps.

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  • 半阙折子戏
    2020-12-09 17:08

    There is a guide on how to migrate to the new version.
    You can find it at: https://firebase.google.com/support/guides/firebase-web

    And here is the relevant snippet for you

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  • 一生所求
    2020-12-09 17:09

    create the connection variable from the firebase.

    con = {
    "apiKey": "your key",
    "authDomain": "example.firebaseapp.com",
    "databaseURL": "https://example.firebaseio.com/",
    "projectId": "example",
    "storageBucket": "example.appspot.com",
    "messagingSenderId": "id"
};

    initialize the firebase using this

    firebase.initializeApp(con);
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