水仙花数［js]

const getNarcissisticNumbers = function (n) {
    let min = Math.pow(10, n - 1) - 1
    let max = Math.pow(10, n)
    let res = []
    for (let i = min; i < max; i++) {
        let arr = (i + '').split('')
        let sum = 0
        for (let j = 0; j < arr.length; j++) {
            sum += Math.pow(arr[j], n)
        }
        if (sum === i) {
            res.push(i)
        }
    }
    return res
}
getNarcissisticNumbers(1)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]