"$ flutter build web" is throwing the error "Missing index.html"?

Issue

When I run:

$ flutter build web 

I’m getting the error

Missing index.html.

The flutter app is displaying in the browser, but in VS Code it reads “No Device.” How can I debug, or fix this problem?

Solution

It would help to see the output of your flutter doctor, but I am guessing that your project is not configured for web.

If you haven’t already, you need to switch to the flutter beta channel like so:

$ flutter channel beta
$ flutter upgrade
$ flutter config --enable-web

At this point, running flutter doctor should show that chrome is available.

Then, switch into your application root directory, and run

$ flutter create .

This will rebuild the project to support web.

Then, from the same directory, you can run flutter build web

Answered By – Alex Collette

Answer Checked By – David Goodson (FlutterFixes Volunteer)

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