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今天就算对JS中日期的加减法做个总结,一共两步
第一步,引入date.format.js,这个JS的作用是将日期转为指定的格式,代码如下
var dateFormat = function () { var token = /d{1,4}|m{1,4}|yy("[^"]*"|'[^']*'/g, timezone = /\b("0" + val; return val; }; // Regexes and supporting functions are cached through closure return function (date, mask, utc) { var dF = dateFormat; // You can't provide utc if you skip other args (use the "UTC:" mask prefix) if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) { mask = date; date = undefined; } // Passing date through Date applies Date.parse, if necessary date = date "invalid date"); mask = String(dF.masks[mask] || mask || dF.masks["default"]); // Allow setting the utc argument via the mask if (mask.slice(0, 4) == "UTC:") { mask = mask.slice(4); utc = true; } var _ = utc "getUTC" : "get", d = date[_ + "Date"](), D = date[_ + "Day"](), m = date[_ + "Month"](), y = date[_ + "FullYear"](), H = date[_ + "Hours"](), M = date[_ + "Minutes"](), s = date[_ + "Seconds"](), L = date[_ + "Milliseconds"](), o = utc "a" : "p", tt: H < 12 "am" : "pm", T: H < 12 "A" : "P", TT: H < 12 "AM" : "PM", Z: utc "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""), o: (o > 0 "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4), S: ["th", "st", "nd", "rd"][d % 10 > 3 "default": "ddd mmm dd yyyy HH:MM:ss", shortDate: "m/d/yy", mediumDate: "mmm d, yyyy", longDate: "mmmm d, yyyy", fullDate: "dddd, mmmm d, yyyy", shortTime: "h:MM TT", mediumTime: "h:MM:ss TT", longTime: "h:MM:ss TT Z", isoDate: "yyyy-mm-dd", isoTime: "HH:MM:ss", isoDateTime: "yyyy-mm-dd'T'HH:MM:ss", isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'" }; // Internationalization strings dateFormat.i18n = { dayNames: [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ], monthNames: [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ] }; // For convenience... Date.prototype.format = function (mask, utc) { return dateFormat(this, mask, utc); };
第二步,将时间转换为毫秒进行加减计算,然后再用上面的js的转为指定的日期
var nowDate = new Date(); //加法操作 var ysDate = new Date(nowDate.getTime()-30*24*60*60*1000).format('yyyy-mm-dd'); //减法操作 var yeDate = new Date(nowDate.getTime()-24*60*60*1000).format('yyyy-m-d');
通过以上两步就实现了,JS中日期的加减法,怎么样简单吧!快去试试!
以上所述就是本文的全部内容了,希望大家能够喜欢。
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js,日期的加减法
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