var arr = ['2016/02/28','2016/02/29', '2017/02/26', '2017/02/27','2017/02/28']; //日期格式需要注意,因為考慮到要判斷日期的連續(xù)性,會把該數組中元素轉為時間戳;

var date = new Date();var y = date.getFullYear();var m = date.getMonth()+1;var d = date.getDate();var today = y+'/'+m+'/'+d;

//轉時間戳 function time(date){  return new Date(date); }

var num = 0;//聲明計數變量;var le = arr.length;//數組長度;if(time(today)-time(arr[le-1])==86400000)//日期時間戳相差一天則連續(xù);判斷當前日期與最近一天{ num=2;//滿足條件,連續(xù)2天; //然后對數組循環(huán)判斷,滿足則num++;否則中斷循環(huán); for(var i=le; i>0; i--){  if(time(arr[i-1])-time(arr[i-2])==86400000){   num++;   }else{    break;//如果只要找出所有連續(xù)的天數,不需要中斷     }   console.log(num);  } }else{   console.log('第一天'); }

today = '2017/03/01';//為驗證二月轉三月特初始化;可省略

function lianxuDay(){     var arr = [     '2016/02/28',     '2016/02/29',      '2016/02/26',      '2017/02/27',     '2017/02/28'    ];    var date = new Date();    var y = date.getFullYear();    var m = date.getMonth()+1;    var d = date.getDate();    var today = y+'/'+m+'/'+d;    today = '2017/03/01';//為驗證二月轉三月特初始化;可省略    console.log(today);    //轉時間戳     function time(date){     return new Date(date);     }    var num = 0;//聲明計數變量;    var le = arr.length;//數組長度;    //console.log(time(today)-time(arr[le-1]));    if(time(today)-time(arr[le-1])==86400000)       //日期時間戳相差一天則連續(xù),此法雖笨,但實用;判斷當前日期與最近一天    {     num=2;//滿足條件,連續(xù)2天;     //然后對數組循環(huán)判斷,滿足則num++;否則中斷循環(huán);     for(var i=le; i>0; i--){      if(time(arr[i-1])-time(arr[i-2])==86400000){       num++;       }else{        break;//如果只要找出所有連續(xù)的天數,不需要中斷      }      console.log(num);     }     }else{     console.log('第一天');    }   }   lianxuDay();