~~~ /** * 公有方法：获取前num天的日期 * * @param {Number} num 自动向上取整 * @param {boolean} order true是日期从大到小，false是从小到大 * @returns MM-dd */ function getTodayDate(num, order = false) { debugger num = Math.ceil(num) let arr_Date = [] for (var i = 0; i < num; i++) { let date = new Date(new Date().getTime() - (i * 24 * 60 * 60 * 1000)) let currMonth = new Date(date).getMonth() + 1 let currDay = new Date(date).getDate() let result = `${currMonth.toString().length < 2 ? `0${currMonth}` : currMonth}-${currDay.toString().length < 2 ? `0${currDay}` : currDay}`; if (order) { arr_Date.push(result); } else { arr_Date.unshift(result); } } // console.log(arr_Date); return arr_Date; } console.log(getTodayDate(7)); ~~~