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platform_value_disallowed

Contents

Keys in the platforms field can't have values.

Description

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The analyzer produces this diagnostic when a key in the platforms map has a value. To learn more about specifying your package's supported platforms, check out the documentation on platform declarations.

Example

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The following pubspec.yaml produces this diagnostic because the key web has a value.

yaml 
name: example
platforms:
  web: "chrome"

Common fixes

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Omit the value and leave the key without a value:

yaml 
name: example
platforms:
  web:

Values for keys in the platforms field are currently reserved for potential future behavior.

Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.