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Firebase – Flutter app running on iOS and Android but not on web

I have a flutter app that runs on Android and iOS without issues, but when I run it on web, I just get a blank browser screen. The first and only error message I see is:

Rejecting promise with error: TypeError: Cannot set properties of
undefined (setting ‘nativeCommunication’) in the file dom.dart, line
195.

This is followed by:

A message on the flutter/lifecycle channel was discarded before it
could be handled. This happens when a plugin sends messages to the
framework side before the framework has had an opportunity to register
a listener. See the ChannelBuffers API documentation for details on
how to configure the channel to expect more messages, or to expect
messages to get discarded:
https://api.flutter.dev/flutter/dart-ui/ChannelBuffers-class.html

This is repeated multiple times.

I even replaced the entire main.dart with the the sample flutter app main.dart and I still got the same issue. I think it has something to do with the overall set up. I am at my wits end as I have been struggling with this for over 3 days now.

Kindly help!

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2

Answers


  1. 0

    Hye, You can try creating a new Flutter project and after running the application on the web & then see what exactly the error occurs.

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  2. 0

    I was getting this error in an app that used the flutter_inappwebview package. For Flutter web builds, you need to add the following script to the body section of your index.html file (source):

      <script type="application/javascript" src="/assets/packages/flutter_inappwebview/assets/web/web_support.js" defer></script>
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