计算周一、周天、月初、月末日期
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2022-05-15 09:49:45
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<title></title>
</head>
<body>
<button onclick="mydateFormat()">敲我</button>
<hr>
<input type="text" id="weekFirst" placeholder="周一">
<input type="text" id="weekLast" placeholder="周日">
<input type="text" id="monthFirst" placeholder="月初">
<input type="text" id="monthLast" placeholder="月末">
<script>
function mydateFormat() {
$("#weekFirst").val(weekFirstDay());
$("#weekLast").val(weekLastDay());
$("#monthFirst").val(getMonthFirstDay());
$("#monthLast").val(getMonthLastDay());
}
// 获取本月第一天日期
function getMonthFirstDay() {
var now = new Date();
var month = ("0" + (now.getMonth() + 1)).slice(-2);
var monthFisrtDate = now.getFullYear() + "-" + (month) + "-01";
return monthFisrtDate;
}
// 获取本月最后一天日期
function getMonthLastDay() {
var now = new Date();
var nextMonthFirstDate = now.getFullYear() + "-" + ("0" + (now.getMonth() + 2)).slice(-2) + "-01";
var monthLastDate = new Date((new Date(nextMonthFirstDate)).getTime() - 24 * 60 * 60 * 1000);
return formatDay(monthLastDate);
}
// 获取本周第一天的日期
function weekFirstDay() {
d = new Date();
var time = d.getTime();
var StartTime = time - (d.getDay() - 1) * 24 * 60 * 60 * 1000;
var weekFirstDay = new Date(StartTime);
return formatDay(weekFirstDay);
}
// 获取本周最后一天日期
function weekLastDay() {
d = new Date();
var time = d.getTime();
var EndTime = time + (7 - d.getDay()) * 24 * 60 * 60 * 1000;
var weekLastDay = new Date(EndTime);
return formatDay(weekLastDay);
}
// 格式化日期
function formatDay(date) {
var d = date;
var day = ("0" + d.getDate()).slice(-2);
var month = ("0" + (d.getMonth() + 1)).slice(-2);
return d.getFullYear() + "-" + (month) + "-" + (day);
}
</script>
</body>
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