var currentY = new Date().getFullYear();
var currentM = new Date().getMonth() + 1;
var lastDay = new Date(currentY, currentM, 0).getDate();
let start = `${currentY}-${currentM}-01`
let end = `${currentY}-${currentM}-${lastDay}`
得到2022-11-01和2022-11-30 lastDay为获取到最后一天