weseek__growi/packages/core/scss/placeholders/_flex-expand.scss

// ref: https://discuss.codemirror.net/t/how-to-fit-the-codemirror-6-widget-into-a-flex-div/4207/4
%flex-expand-horiz {
  display: flex;
  flex-direction: row;
  flex-grow: 1;
  height: 100%;
  overflow-y: auto;
}

// ref: https://discuss.codemirror.net/t/how-to-fit-the-codemirror-6-widget-into-a-flex-div/4207/4
%flex-expand-vert {
  display: flex;
  flex: 1;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
}