js纯数字逐一停止显示效果的实现代码

function showScore($ele, num, secand, pause){ //second 按照秒数，动画运行多少秒

        if (!secand) { secand = 2;}

        if (!pause) { pause = 20;}



        var len = String(num).length;



        var temnum, times = 0 , stepTimes, max ;

        var numArr = String(num).split("");





        function getRandom(n){

          var num = Math.floor(Math.random()*(Math.pow(10, n)-1 - Math.pow(10, n-1))+Math.pow(10, n-1));



          if (String(num).length !== n) {num = getRandom(n);}



          return num;

        }



        function setValue(num, pause, secand){//second 运行多少秒后停止

          var len = String(num).length, j=0;



          if (!stepTimes) {

            max = Math.ceil(secand*1000/len);

            stepTimes = Math.ceil(max/pause);

          }

          

          temnum = "";

          setTimeout(function(){

            for (var i = 1; i <= len; i++) {

              if (times >= stepTimes*i) {

                j++;

                temnum += numArr[i-1]+"";

              }else{

                break;

              }

            };



            if (j < len) {

              $ele.html(temnum+""+getRandom(len-j));

            }else{

              $ele.html(temnum);

            }

            

            

            if (times >= max || j >= len) {return;};



            setValue(num, pause, secand);

            times++;

            

          }, pause);





        }



        setValue(num, pause, secand);



      }



showScore($(".num"), 2344, 1.5, 10);