获取前num天的日期

万和IT

1. /**
   
2. * 公有方法：获取前num天的日期
   
3. *
   
4. * @param {Number} num 自动向上取整
   
5. * @param {boolean} order true是日期从大到小，false是从小到大
   
6. * @returns MM-dd
   
7. */
   
8. function getTodayDate(num, order = false) {
   
9.   debugger
   
10.   num = Math.ceil(num)
    
11.   let arr_Date = []
    
12.   for (var i = 0; i < num; i++) {
    
13.     let date = new Date(new Date().getTime() - (i * 24 * 60 * 60 * 1000))
    
14.     let currMonth = new Date(date).getMonth() + 1
    
15.     let currDay = new Date(date).getDate()
    
16.     let result = `${currMonth.toString().length < 2 ? `0${currMonth}` : currMonth}-${currDay.toString().length < 2 ? `0${currDay}` : currDay}`;
    
17.     if (order) {
    
18.       arr_Date.push(result);
    
19.     } else {
    
20.       arr_Date.unshift(result);
    
21.     }
    
22.   }
    
23.   // console.log(arr_Date);
    
24.   return arr_Date;
    
25. }
    
26. console.log(getTodayDate(7));
    
27. 
    

复制代码