JS数组分段

遍历原数组，截取子数组后组成新数组

function splitList(list, range) {
    let count = list.length
    let startIndex = 0
    let splitList = []
    while(count > 0) {
        let rangeLength = Math.min(range, count)
        let subList = list.slice(startIndex, startIndex + rangeLength)
        splitList.push(subList)
        count -= rangeLength
        startIndex += rangeLength
    }
    return splitList
}

使用：

let array = [1, 2, 3, 4, 5, 6, 7, 8]
let result = splitList(array, 3)
console.log(result)