JS 日期操作代碼，獲取當(dāng)前日期，加一天，減一天

2019-11-21 00:40:51

字體：大中小

供稿：網(wǎng)友

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-type" content="text/html; charset=gb2312" /> <title>title</title> <body id="" onload=""> <input type="text" id="date" /> <input type="button" value="加" id="Add" /> <input type="button" value="減" id="Minus" /> <script type="text/javascript"> $ = function(o) { return typeof o === 'string' ? document.getElementById(o) : o }; //設(shè)置當(dāng)前日期 var ma = [['1','3','5','7','8','10'],['4','6','9','11']]; var dd = new Date(); var x = dd.toLocaleString(); var o = pasDate(x); $('date').value = o.join('-'); //轉(zhuǎn)化日期函數(shù) function pasDate(da) { var yp = da.indexOf('年'), mp = da.indexOf('月'), dp = da.indexOf('日'); var y = da.substr(0,yp), m = da.substr(yp + 1,mp - yp - 1), d = da.substr(mp + 1,dp - mp - 1); return [y,m,d]; } //判斷數(shù)組a是否存在在元素n function check(n,a) { for(var i = 0,len = a.length;i < len;i++) { if(a[i] == n) { return true; } } return false; } //閏?年? function isLeap(y) { return ((y % 4 == 0 && y % 100 != 0) || y % 400 == 0) ? true : false; } //實(shí)現(xiàn)加減f：'1'加，'0'減 function trans(o,f) { var d = o.split('-'); var l = isLeap(d[0]); if(f == '1') { if((check(d[1],ma[0]) && (d[2] == '31')) || (check(d[1],ma[1]) && (d[2] == '30')) || (d[1] == '2' && d[2] == '28' && !l) || (d[1] == '2' && d[2] == '29' && l)) { return d[0] + '-' + (d[1] * 1 + 1) + '-' + 1; } else if(d[1] == '12' && d[2] == '31') { return (d[0] * 1 + 1) + '-' + '1-1'; } else { return d[0] + '-' + d[1] + '-' + (d[2] * 1 + 1); } } else if(f == '0') { if(check(d[1] - 1,ma[0]) && (d[2] == '1')) { return d[0] + '-' + (d[1] - 1) + '-' + '31'; } else if(check(d[1] - 1,ma[1]) && (d[2] == '1')) { return d[0] + '-' + (d[1] - 1) + '-' + '30'; } else if(d[1] == '1' && d[2] == '1') { return (d[0] - 1) + '-' + '12-31'; } else if(d[1] == '3' && d[2] == '1' && !l) { return d[0] + '-' + '2-28'; } else if(d[1] == '3' && d[2] == '1' && l) { return d[0] + '-' + '2-29'; } else { return d[0] + '-' + d[1] + '-' + (d[2] - 1); } } else { return; } } $('Add').onclick = function() { var v = $('date').value; $('date').value = trans(v,'1'); } $('Minus').onclick = function() { var v = $('date').value; $('date').value = trans(v,'0'); } </script> </body> </head> </html>

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