> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/developer-guides/error-messages/0001-to-0023/aur0015.md).

# AUR0015

yyyy is a native function and, therefore cannot be safely constructed by DI. If this is intentional, please use a callback or cachedCallback resolver.

### **Error message**

`yyyy` is a native function and cannot be safely constructed by DI. If this is intentional, please use a callback or cachedCallback resolver.

### **Parameters**

name (string)

### Error explanation

This error occurs when you attempt to use the DI container to construct a native JavaScript built-in type (such as `String`, `Number`, `Array`, etc.) using `container.invoke(key)` or `container.getFactory(key)`. Native functions cannot be safely constructed by the DI system.

### Common causes

* Attempting to inject or construct a built-in type (like `String`, `Number`, `Array`, etc.) as a dependency.
* Accidentally passing a native function as a key to `container.invoke` or `container.getFactory`.
* Misconfiguration or missing `@inject` decorator for intrinsic types.

### How to fix

* Avoid using native JavaScript types as keys for DI construction.
* If you need to provide a value for a built-in type, use a callback or cachedCallback resolver to supply the value.
* Use the `@inject` decorator to specify the correct dependency key for intrinsic types.

### Debugging tips

* Check the stack trace to see where the native function is being constructed.
* Search your codebase for uses of `container.invoke` or `container.getFactory` with native types.
* Ensure all dependencies are registered with appropriate resolvers.

Please also note that this error could be caused by a plugin and not your application. After ruling out that the error is not being caused by your code, try removing any registered plugins one at a time to see if the error resolves itself.


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