Error when adding provider package to flutter web project

Question

I tried to add the provider package to my flutter web project and got the following error:

Because every version of provider depends on flutter any from sdk which is >forbidden, provider is forbidden. So, because WebApplication depends on provider ^3.0.0, version solving >failed.

Flutter users should run flutter packages get instead of pub get. Process finished with exit code 69

I tried flutter packages get and also upgraded flutter to the newest version. When running flutter packages get the error is not shown but when i tried webdev serve the following error is shown:

webdev could not run for this project. Could not find a file named "pubspec.yaml" in >"C:\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\provider-3.0.0".

also i looked ad https://github.com/flutter/flutter/issues/21338 but didn't solve my error.

Im using Flutter (Channel beta, v1.6.3, on Microsoft Windows [Version 10.0.17134.765], locale de-DE)

environment:
  sdk: '>=2.3.0-dev.0.1 <3.0.0'

dependencies:
  flutter_web: any
  flutter_web_ui: any
  provider: ^3.0.0

dev_dependencies:
  build_runner: ^1.4.0
  build_web_compilers: ^2.0.0
  pedantic: ^1.0.0

Because Flutter Web requires the beta channel null safety is required. There is a prerelease 5.0.0v available to date @ pub.dev/packages/provider/versions/5.0.0-nullsafety.2 — Brandon Pillay

Pavel Zika Pavel Zika · Accepted Answer · 2019-06-18T19:22:17

Your question is already answered here: https://github.com/rrousselGit/provider/issues/82

Use flutter_web branch of kevmoo's https://github.com/kevmoo/provider povider fork as:

dependencies:
  flutter_web: any
  flutter_web_ui: any
  provider: any

dependency_overrides:
  flutter_web:
    git:
      url: https://github.com/flutter/flutter_web
      path: packages/flutter_web
  flutter_web_ui:
    git:
      url: https://github.com/flutter/flutter_web
      path: packages/flutter_web_ui
  provider:
    git:
      url: https://github.com/kevmoo/provider
      ref: flutter_web

Error when adding provider package to flutter web project

2 Answers