JS内置对象Date-----写倒计时

function countDown(time) {
        var nowTime = +new Date();
        var inputTime = +new Date(time);
        var times = (inputTime - nowTime) / 1000;
        var d = parseInt(times / 60 / 60 / 24);
        d = d < 10 ? ‘0‘ + d : d;
        var h = parseInt(times / 60 / 60 % 24);
         h = h < 10 ? ‘0‘ + h : h;
         var m = parseInt(times / 60 % 60);
        m = m < 10 ? ‘0‘ + m : m;
        var s = parseInt(times % 60);
        s = s < 10 ? ‘0‘ + s : s;
        return d + ‘天‘ + h + ‘时‘ + m + ‘分‘ + s + ‘秒‘;
        }
       console.log(countDown(‘2020-04-10 23:30:00‘));