Sorry, I think I was not precise enough. It takes significant space visually, for the user to be able easily evaluate it without directly looking at it. But it is transparent to mouse events, and only hovers the area without taking any additional space (moving other blocks and components around).
Besides it's responsive (the indicator is getting smaller for small areas), so that it will never take over much space making the content inconvenient to read. Resize the page and see how the indicator is shrinked.
Sorry, I think I was not precise enough. It takes significant space visually, for the user to be able easily evaluate it without directly looking at it. But it is transparent to mouse events, and only hovers the area without taking any additional space (moving other blocks and components around).
Besides it's responsive (the indicator is getting smaller for small areas), so that it will never take over much space making the content inconvenient to read. Resize the page and see how the indicator is shrinked.