js中按钮怎么改变多个值

按钮显示5，4，3，2，1
之后自动跳转下一个界面，弄了半天没搞明白，怎么改变成多个值

setInterval


this.se = 5
      this.timer = setInterval(() => {
        console.log(this.se)
        if (this.se === 0) {
          clearInterval(this.timer)
          alert(1)
        } else {
          this.se--
        }
      }, 1000)

我觉得你在找jquery-step

<!DOCTYPE html>
<html>

    <body>
        <button type="button" id="b1">5</button>
    </body>
    <script>
        var b1 = document.getElementById("b1");
        var num = b1.innerText;
        window.setInterval(function() {
            num--;
            if (num > 0) {
                b1.innerText = num;
            } else {
                window.clearInterval();
                window.location.href = "A.html"
            }

        }, 500);
    </script>
</html>