AngularJS 1.0案例 进度条

angular.module('M13', ['ng']).
  controller('C13', function($scope, $interval){
    let percentage = 0;
    $scope.myStyle = {width: '0%'};
    let t = $interval(function(){
      percentage += 10;
      $scope.myStyle.width = percentage + "%"
      percentage < 100 ? percentage : $interval.cancel(t);
      // if(percentage>=100){
      //     $interval.cancel(t);
      //     console.log('已完成');
      // }
    }, 50)
  })