emberjs

We really should be appending the DOM nodes into #qunit-fixture especially for things that require running the browsers HTML parser.

Is your feature request related to a problem? Please describe.
I understand Ember Inspector is for the development and Debugging phase. And I am of the opinion that, having access to the private (by convention, underscore prefixed) fields/property is a very useful feature when hunting for problems like why a certain computed property based on other field and property have an unexpected value.

• [Error] Duplicate Attribute Names
• [Error] Duplicate Resource Names
• [Warn] No Attributes on Entity
• [Error] Controller is defined for an entity that has not been added to the ContextGraph
• [Error] Related models with [HasOne] or [HasMany] are not defined on the graph
• [Warn] Bulk route exists, but operations have not been enabled
• `[Warn

We are no longer using the ember slack. Bonus points for notifying a bot on Discord.

• http://hangaroundtheweb.com/2019/10/creating-runtime-assisted-codemods-using-telemetry-helpers/
• http://hangaroundtheweb.com/2020/05/setting-up-coveralls-for-your-ember-addons/
• http://medium.com/@nowims/moving-from-react-to-ember-2020-86e082477d45
• http://www.balinterdi.com/blog/built-in-input-helpers-in-ember-js-when-and-whether-they-should-be-used
• https://0xadada.

Post all of our awesome refactoring, the visualizer and CSS debugger are largely broken. I figure this is a good time to revisit them and want to lay out a couple of things we should list as common traps.

Original Implementation Issue: html-next/smoke-and-mirrors#59
Original Implementation: https://github.com/runspired/smoke-and-mirrors/blob/feat/virtualizati

willTransition and didTransition are removed in favor of router service events in Ember 4. Guide here. We should start showing the router events instead.

We are using them on this page: https://guides.emberjs.com/release/routing/preventing-and-retrying-transitions

This PR can be opened and merged as soon as its ready. We d