We already answered to your question in the support ticket that you've opened on the same topic. Let me share my answer here as well:
Details on how to add Angular Viewer to the project are available in How To: Use Angular Report Viewer with Angular CLI help article.
We do support Angular 6 version applications and we've already tested this scenario. Please check the project setup and example in Angular6 application working with local resources (without any CDNs) KB article."
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