jupyterlab/packages/apputils/style/iframe.css

/*-----------------------------------------------------------------------------
| Copyright (c) Jupyter Development Team.
| Distributed under the terms of the Modified BSD License.
|----------------------------------------------------------------------------*/
/*
When drag events occur, `p-mod-override-cursor` is added to the body.
Because iframes steal all cursor events, the following two rules are necessary
to suppress pointer events while resize drags are occuring. There may be a
better solution to this problem.
*/
body.p-mod-override-cursor .jp-IFrameWidget {
  position: relative;
}


body.p-mod-override-cursor .jp-IFrameWidget:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
}