One sheet of frameless 10mm glass, no door. Nothing to clean, nothing to fail - no track, no hinge, no seal. The usual choice for wet rooms, accessible bathrooms and narrow ensuites.
Water containment depends on your floor fall and panel length. Allow at least 400mm of open entry and aim the shower head at the glass, not the gap. If your floor is flat or the waste sits off to one side, pivot and hinged shower screens will save you mopping.
Panels are 2000mm high, held by a wall channel or brackets, and available in all seven finishes. For a full enclosure instead, see corner shower screens or wall to wall screens.