console 命令行工具 X clear

console

function animateNumber(s, e, callback) {
    const count = 10;

    if (s === e) {
        callback(e);
        return;
    }

    let i = s;
    let min = Math.min(s, e);
    let max = Math.max(s, e);
    let incr = Math.round((e - s) / count);


    let timer = setInterval(() => {
        i += incr;

        if (i <= min || i >= max) {
            clearInterval(timer);
            i = e;
        }

        callback(i);
    }, 1000 / count);
}

function animateNumber2(s, e, callback) {
    const ss = s.toString()
    const ee = e.toString()
    const sarr = []
    const earr = []

    for (let i in ss) {
        sarr.push(parseInt(ss[i]))
    }
    for (let i in ee) {
        earr.push(parseInt(ee[i]))
    }

    console.log(sarr, earr)
}

// animateNumber(12, 223, (n) => {
//     console.log(n)
//     document.getElementById('num').innerText = n
// })

animateNumber(223, 21326, (n) => {
    console.log(n)
    document.getElementById('num').innerText = n
})

<html>
    <head></head>
    <body>
	<div class="num" id="num">1</div>
</body>
</html>

.num {
    font-size: 20px;
    
}