{
  // A hole renders as `void`, and a run of holes as `void` times the length
  // of the run.
  "with holes in the middle": [1, , 3, , , 6],

  "hole at the start": [, 1],

  "two holes at the start": [, , 1],

  "hole at the end": [1, , ],

  "two holes at the end": [1, , , ],

  "all holes, length 1": [,],

  "all holes, length 2": [, ,],

  "all holes, length 50": new Array(50),

  "all holes across the limit": new Array(500),

  "holes across the limit": (() => {
    // A run of holes which crosses the default limit of 100 renders as only
    // the holes below the limit.
    const a = [1];
    a.length = 250;
    return a;
  })(),
}

--

with holes in the middle:
[1,void,3,void*2,6]
[
  1,
  void,
  3,
  void * 2,
  6
]
[
  1,
  void,
  3,
  void * 2,
  6
]

hole at the start:
[void,1]
[
  void,
  1
]
[
  void,
  1
]

two holes at the start:
[void*2,1]
[
  void * 2,
  1
]
[
  void * 2,
  1
]

hole at the end:
[1,void]
[
  1,
  void
]
[
  1,
  void
]

two holes at the end:
[1,void*2]
[
  1,
  void * 2
]
[
  1,
  void * 2
]

all holes, length 1:
[void]
[
  void
]
[
  void
]

all holes, length 2:
[void*2]
[
  void * 2
]
[
  void * 2
]

all holes, length 50:
[void*50]
[
  void * 50
]
[
  void * 50
]

all holes across the limit:
[void*100,...length:500]
[
  void * 100,
  ... length: 500
]
[
  void * 100,
  {
    "/...": {
      length: 500
    }
  }
]

holes across the limit:
[1,void*99,...length:250]
[
  1,
  void * 99,
  ... length: 250
]
[
  1,
  void * 99,
  {
    "/...": {
      length: 250
    }
  }
]