What is a Pubspec yaml file in Dart?

Every pub package needs some metadata so it can specify its dependencies. Pub packages that are shared with others also need to provide some other information so users can discover them. All of this metadata goes in the package’s pubspec: a file named pubspec. yaml that’s written in the YAML language .

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How do I update a pub package?

First, comment that the packaging line in the pubspec. yaml file and run flutter pub get after successfully get packages to uncomment that line (if you want to upgrade/downgrade to a specific version that mentioned version too) it will upgrade to the latest version.

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