AUR0022

The @inject decorator on the target ('xxxx') type 'yyyy' is not supported.

Error message

The @inject decorator on the target ('xxxx') type 'yyyy' is not supported.

Parameters

• Target name (string)

• Target type (string)

Error explanation

This error occurs when the @inject decorator is used in a way that is not supported by Aurelia's DI system. For example, applying @inject to a field, method, or other unsupported target will trigger this error. The @inject decorator is intended for use on classes and, in some cases, constructor parameters.

Common causes

• Using @inject on a field, method, or property instead of a class or constructor parameter.

• Incorrect usage of the decorator in TypeScript or JavaScript code.

• Attempting to use @inject in a context not supported by Aurelia's DI system.

How to fix

• Only use @inject on classes or constructor parameters.

• Review the documentation for correct usage of the @inject decorator.

• Refactor your code to move dependency injection to supported locations (class or constructor).

Debugging tips

• Check the stack trace to see where the invalid @inject usage occurred.

• Search your codebase for all usages of @inject and verify they are on classes or constructors.

• If using plugins, try disabling them one at a time to isolate the source.