前言

适用于pc端的数据分页...

实现

let arr = [];

for(let i=1; i<=300; i++) {
    arr.push(i)
}

let pageData = function (arr,num) {
    let newArr = [];
    if(!Array.isArray(arr)) return;

    if(arr.length > num) {
        for(let i=0; i<arr.length; i+= num) {
            newArr.push(arr.slice(i, i+num))
        }
    } else {
       newArr.push(arr)
    }

    return newArr;
}

[
  [
     1,  2,  3,  4,  5,  6,  7,
     8,  9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20
  ],
  [
    21, 22, 23, 24, 25, 26, 27,
    28, 29, 30, 31, 32, 33, 34,
    35, 36, 37, 38, 39, 40
  ],
  [
    41, 42, 43, 44, 45, 46, 47,
    48, 49, 50, 51, 52, 53, 54,
    55, 56, 57, 58, 59, 60
  ],
  [
    61, 62, 63, 64, 65, 66, 67,
    68, 69, 70, 71, 72, 73, 74,
    75, 76, 77, 78, 79, 80
  ],
  [
    81, 82, 83, 84, 85,  86, 87,
    88, 89, 90, 91, 92,  93, 94,
    95, 96, 97, 98, 99, 100
  ],
  [
    101, 102, 103, 104, 105,
    106, 107, 108, 109, 110,
    111, 112, 113, 114, 115,
    116, 117, 118, 119, 120
  ],
  [
    121, 122, 123, 124, 125,
    126, 127, 128, 129, 130,
    131, 132, 133, 134, 135,
    136, 137, 138, 139, 140
  ],
  [
    141, 142, 143, 144, 145,
    146, 147, 148, 149, 150,
    151, 152, 153, 154, 155,
    156, 157, 158, 159, 160
  ],
  [
    161, 162, 163, 164, 165,
    166, 167, 168, 169, 170,
    171, 172, 173, 174, 175,
    176, 177, 178, 179, 180
  ],
  [
    181, 182, 183, 184, 185,
    186, 187, 188, 189, 190,
    191, 192, 193, 194, 195,
    196, 197, 198, 199, 200
  ],
  [
    201, 202, 203, 204, 205,
    206, 207, 208, 209, 210,
    211, 212, 213, 214, 215,
    216, 217, 218, 219, 220
  ],
  [
    221, 222, 223, 224, 225,
    226, 227, 228, 229, 230,
    231, 232, 233, 234, 235,
    236, 237, 238, 239, 240
  ],
  [
    241, 242, 243, 244, 245,
    246, 247, 248, 249, 250,
    251, 252, 253, 254, 255,
    256, 257, 258, 259, 260
  ],
  [
    261, 262, 263, 264, 265,
    266, 267, 268, 269, 270,
    271, 272, 273, 274, 275,
    276, 277, 278, 279, 280
  ],
  [
    281, 282, 283, 284, 285,
    286, 287, 288, 289, 290,
    291, 292, 293, 294, 295,
    296, 297, 298, 299, 300
  ]
]