Switching an application from Angular 5 to Angular 8 can lead to unexpected styling problems

My current project is based on Angular version 5.2, but we recently decided to upgrade it to Angular 8 along with updating the Angular CLI. After completing the necessary code refactoring for Angular 8, the application builds successfully without any errors. However, I am facing issues with the styling of the app after the update. The navigation bar does not appear as expected and some button styles are not rendering properly. We use Bootstrap elements in our project and have overridden some of them with our own Sass styling.

In the past, I had to manually install tether as a dependency for Bootstrap to resolve build errors.

Before Update - Angular 5.2: https://i.sstatic.net/jbZ9j.png

After Update - Angular 8: https://i.sstatic.net/90GkZ.png

I'm encountering an error when trying to navigate to certain routes within the app as well. https://i.sstatic.net/Tnc8t.png

Despite attempting various solutions such as reinstalling dependencies and following the Angular update guide instructions, I have made no progress in resolving these issues. Does anyone have any insights into why this might be happening?

javascriptangulartypescriptsingle-page-applicationangular8

Answer №1

Be sure to include the following snippet in your polyfill

(window as any).global = window;

The ng2-dragula library that you're utilizing addresses this issue in their setup instructions.

To address problem #849, a temporary solution has been implemented while the original dragula code still depends on global variables.

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