JS如何获取最近一个月或指定天数的日期,并以数组的形式存储

代码

• num为传递的天数 (传递30查最近一个月)

get_date(num) {
	let dateArray = []
	    //获取今天日期
	    let myDate = new Date()
	    let today = myDate.getFullYear() + '-' + (myDate.getMonth() + 1) + "-" + myDate.getDate();
	    myDate.setDate(myDate.getDate() - num)
	    let dateTemp;  // 临时日期数据
	    let flag = 1;
	    for (let i = 0; i < num; i++) {
	        dateTemp = myDate.getFullYear() + '-' + (myDate.getMonth() + 1) + "-" + myDate.getDate()
	        dateArray.push({
	            date: dateTemp
	        })
	        myDate.setDate(myDate.getDate() + flag);
	    }
	    dateArray.push({
	        date: today
	    })
	    let arr = []
	    let newArr = []
	    dateArray.forEach(item => {
	        arr.push(item.date.split('-'))
	    })
	    for (let i = 0; i < arr.length; i++) {
	        if (arr[i][1] < 10) {
	            arr[i][1] = "0" + arr[i][1]
	        }
	        if (arr[i][2] < 10) {
	            arr[i][2] = "0" + arr[i][2]
	        }
	    }
	    for (let j = 0; j < arr.length; j++) {
	        newArr.push(arr[j].join("-"))
	    }
	    // 当前日期
	    let nowDate = newArr[newArr.length - 1]
	    // 30天前日期 
	    let previousDate = newArr[0]
	    // 日期区间数组
	    console.log(nowDate)
	    console.log(previousDate)
	    console.log(newArr)
	  return newArr
}