platform_value_disallowed

Keys in the platforms field can't have values.

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.

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

name: example
platforms:
  web: "chrome"

Omit the value and leave the key without a value:

name: example
platforms:
  web:

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