# Contributing to Aurelia UX

**URL:** <https://discourse.aurelia.io/t/contributing-to-aurelia-ux/3023>\
**Category:** Uncategorized\
**Created:** [October 28, 2019, 10:37am UTC](https://discourse.aurelia.io/t/contributing-to-aurelia-ux/3023 "2019-10-28T10:37:46Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![edel020](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/edel020/32/1342_2.png) [@edel020](https://discourse.aurelia.io/u/edel020)\
**Post date:** [October 29, 2019, 7:32am UTC](https://discourse.aurelia.io/t/contributing-to-aurelia-ux/3023/4 "2019-10-29T07:32:09Z")

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Hi all -

Getting the same error when building the excellent slick-grid demo project:

> <https://github.com/ghiscoding/aurelia-slickgrid-demos/tree/master/webpack-bs4-demo>
>
> //github.com/ghiscoding/aurelia-slickgrid-demos/tree/master/webpack-bs4-demo

```
ERROR in /.../aurelia/aurelia-slickgrid-demos/webpack-bs3-demo/node_modules/aurelia-dependency-injection/dist/aurelia-dependency-injection.d.ts
[tsl] ERROR in /.../aurelia/aurelia-slickgrid-demos/webpack-bs3-demo/node_modules/aurelia-dependency-injection/dist/aurelia-dependency-injection.d.ts(67,5)
TS1110: Type expected.

```

Possibly related to this issue:

> [@Cannot autoinject abstract classes in aurelia-dependency-injection 1.5.0](https://discourse.aurelia.io/t/cannot-autoinject-abstract-classes-in-aurelia-dependency-injection-1-5-0/2844):
>
> A [recent update](https://github.com/aurelia/dependency-injection/releases/tag/1.5.0) to the dependency injection makes the autoinject (and i guess others) decorator incompatible with TypeScript abstract classes. This breaks an inheritance-based scenario common in our application: we use abstract, generic classes for viewModels with high-level shared functionality (e.g. a generic form control, a generic detail page…). These use @autoinject and have a defined constructor with a sometimes large number of arguments: for reference the generic detail page constructo…

Any help appreciated.

Eamonn

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