Javascript 有没有办法在给定一组值的情况下创建动态范围，并计算每个范围有多少

因此，我有一个带有Piechart的前端，希望显示我的客户中年龄的百分比(一个数据库表).我已经存储了每个客户的年龄，所以我有一个这样的array.

const ages = [12,42,23,42,12,65,75,12,43,54,12,53,24,23,54,64,76,12,42];

考虑到这些值，我想最终得到这样的东西

const data = {
    labels: ['12-20', '21-40', '41-60', '61-76']
    dataSet: [4, 6, 2, 5] // This is the amount of ages between each range. The sum of these must be equivalent of the length of the array 
}

这就是我到目前为止所try 的

const ages = [12, 42, 53, 12, 32, 12, 52, 66, 76, 87, 23, 12, 43, 12, 43, 54, 65].sort((a, b) => a - b);
const minAge = Math.min(...ages);
const maxAge = Math.max(...ages);
const q1 = ages[Math.floor(ages.length / 4)];
const q2 = ages[Math.floor(ages.length / 2)];
const q3 = ages[Math.floor(ages.length * 3 / 4)];
let firstRangeCount = 0;
let secondRangeCount = 0;
let thirdRangeCount = 0;
let fourthRangeCount = 0;
for (const age of ages) {
    if (age) {
        if (age <= q1) {
            firstRangeCount++;
        } else if (age <= q2) {
            secondRangeCount++;
        } else if (age <= q3) {
            thirdRangeCount++;
        } else {
            fourthRangeCount++;
        }
    }
}
const data = {
    labels: [
        `${minAge} - ${q1}`,
        `${q1} - ${q2}`,
        `${q2} - ${q3}`,
        `${q3} - ${maxAge}`,
    ],
    datasets: {
        label: 'Ages',
        data: [firstRangeCount, secondRangeCount, thirdRangeCount, fourthRangeCount],
    }
}

但是这个解决方案的问题是它不是动态的.如果ages数组包含较少的数据，则不适用4个范围.

我怎样才能使这个范围"动态"？.我读过一些关于四分位范围的文章，但对我帮助不大