2024年07月19日 建站教程
代码封装：
function getMonth(type, months) {
var d = new Date();
var year = d.getFullYear();
var month = d.getMonth() + 1;
if (Math.abs(months) > 12) {
months = months % 12;
};
if (months != 0) {
if (month + months > 12) {
year++;
month = (month + months) % 12;
} else if (month + months < 1) {
year--;
month = 12 + month + months;
} else {
month = month + months;
};
};
month = month < 10 ? "0" + month: month;
var date = d.getDate();
var firstday = year + "-" + month + "-" + "01";
var lastday = "";
if (month == "01" || month == "03" || month == "05" || month == "07" || month == "08" || month == "10" || month == "12") {
lastday = year + "-" + month + "-" + 31;
} else if (month == "02") {
if ((year % 4 == 0 && year % 100 != 0) || (year % 100 == 0 && year % 400 == 0)) {
lastday = year + "-" + month + "-" + 29;
} else {
lastday = year + "-" + month + "-" + 28;
};
} else {
lastday = year + "-" + month + "-" + 30;
};
var day = "";
if (type == "s") {
day = firstday;
} else {
day = lastday;
};
return day;
};
调用方法：
console.log('获取月开始日期：', getMonth('s',0))
console.log('获取月结束日期：', getMonth('e',0))
//下个月
getMonday("s",1)
getMonday("e",1)
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