== before appending
is linkEl.sheet null? true
- document stylesheets (length = 0)
- shadow root stylesheets (length = 0)
== link loaded
is linkEl.sheet null? false
- document stylesheets (length = 0)
- shadow root stylesheets (length = 1)
-- shadow root linkEl.sheet === sheet: true
== link removed
is linkEl.sheet null? true
- document stylesheets (length = 0)
- shadow root stylesheets (length = 0)
