user-experience

Summary

Running the WAVE plugin shows not all text has sufficient contrast, and an empty link is present, these are minor issues and potentially false positives, as the site may serve as an example for others it would be great if at least all errors from automated tests are resolved.

Expected result

Running a tool such as the WAVE plugin on Chrome shows no errors.

Actual res

SVG will very likely take a little longer to render than a base64-encoded raster image. And the Gaussian Blur applied to the simple SVG shapes created by Primitive is probably quite CPU intensive.

Let's run a series of performance tests, ideally on WPT, to compare LQIP raster image rendering performance vs. SQIP rendering performance and also compare CPU utilization.

not sure if this can be fixed the way the extension works, but anyway, just reporting it...

extension enabled vs disabled:
![Screenshot from 2021-08-16 10-08-58](https://user-images.githubusercontent.com/11864620/129569589-d2f44260-0936-4398-97b1-838626764

Thanks for the control. It would be really nice if you can add a feature to use it not for automatic navigation but if we could add items manually, for example:

breadcrumb.PushNewItem(object myDataItem, string label);

Remove item and children
breadcrumb.PopAfterItem(object myDataItem);

And an event when a item is clicked
OnItemClick(object source, object myDataItem)

What's your idea?
QueryParam and QueryParamGroup currently expose a valueChanges observable, akin to Angular Forms, which is backed by a Subject<>. This can create a problem as the first value may be "missed", see #72 and #176. While there is a relatively easy solution to this, it still creates unnecessary boilerplate and can be confusing.

Therefore, we should expose a value$ observa