@kanunilabs/pivotgrid / portalParent
Function: portalParent()
portalParent():
HTMLElement
Where a popup host must be appended so that it is actually PAINTED.
Under the native Fullscreen API only the fullscreen element's subtree is
rendered: a host appended to <body> exists, receives events, and is
invisible. That is what made every menu, dialog and the field chooser
"not open" while the grid was fullscreen — they opened, behind the one
element the browser was drawing. So while something is fullscreen, hosts go
INSIDE it. The CSS-emulated fallback (.pivot-is-fullscreen, a fixed
z-index 9990 layer) gets the same treatment, for the same reason.
Returns
HTMLElement