// 上一月
const getUpMonth = function(v) {
	let date = new Date(v); //获取日期  日期是2020-07 写成你自己的
	let CurrentDate = "";
	let year = date.getFullYear();
	let month = (date.getMonth()) < 10 ? "0" + (date.getMonth()) : (date.getMonth()); //自动补0
	if (month < 1) {
		CurrentDate = (year - 1) + "-" + "12"
	} else {
		CurrentDate = year + "-" + month
	}
	return CurrentDate
}
export default getUpMonth