Since we can't use traditional event handlers in the print iframe when JS is blocked, we consider it safe to discard of the hidden iframe once event handling has returned to the main content window.
Since we can't use traditional event handlers in the print iframe when
JS is blocked, we consider it safe to discard of the hidden iframe once
event handling has returned to the main content window.

jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab