一、时间转化为时间戳
1.第一种方法
function getDateTimeStamp(dateStr){
console.log(dateStr.replace(/-/gi,"/"))
return Date.parse(dateStr.replace(/-/gi,"/"));
}
getDateTimeStamp('2020/04/14 20:00')
---打印出 1586865600000
getDateTimeStamp('2020-04-14 20:00')
---打印出 1586865600000
2.方法二
let d = new Date('2020-04-14 20:00')
let t = d.getTime(d) // 方法1
let t = d.valueOf(d) // 方法2
let t = d.parse(d) // 方法3
console.log(t);
---打印出 1586865600000
二、时间戳转化为时间
const format = (time, format = 'yyyy-mm-dd') => {
const d = time ? new Date(time) : new Date();
const t = (i) =>; { return (i < 10 ? '0' : '') + i };
const year = d.getFullYear();
const month = d.getMonth() + 1;
const day = d.getDate();
const hour = d.getHours();
const minutes = d.getMinutes();
const seconds = d.getSeconds();
const weekday = d.getDay();
return format.replace(/(yy){1,2}|m{1,2}|d{1,2}|h{1,2}|i{1,2}|s{1,2}|w{1,2}/gi, function(r) {
switch (r.toUpperCase()) {
case 'YY':
return ('' + year).substr(2);
case 'YYYY':
return year;
case 'M':
return month;
case 'MM':
return t(month);
case 'D':
return day;
case 'DD':
return t(day);
case 'H':
return hour;
case 'HH':
return t(hour);
case 'I':
return minutes;
case 'II':
return t(minutes);
case 'S':
return seconds;
case 'SS':
return t(seconds);
case 'W':
return `星期${['日', '一', '二', '三', '四', '五', '六'][weekday]}`;
case 'WW':
return ['Sunday', 'Monday', 'TuesDay', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][weekday];
}
});
}
format(1586865600000); // 2020-04-14
format(1586865600000, 'yyyy/mm/dd hh:ii:ss'); // 2020/04/14 20:00:00
format(1586865600000, 'yy/m/d hh:ii:ss'); // 20/4/14 20:00:00
format(1586865600000, 'yyyy/mm/dd w'); // 2020/04/14 星期二
format(1586865600000, 'mm/dd/yyyy'); // 04/14/2020
三、时间转化为特定形式
getDateTimeStamp('2020-04-14 20:00:00')--将时间转化为时间戳
function getDateTimeStamp(dateStr){
console.log(dateStr.replace(/-/gi,"/"))
let dateTimeStamp = dateStr.replace(/-/gi,"/");
getDateDiff(dateTimeStamp)
return Date.parse(dateStr.replace(/-/gi,"/"));
}
function getDateDiff(dateTimeStamp){--将时间戳和当前时间比较,转化为特定的形式
var minute = 1000 * 60;
var hour = minute * 60;
var day = hour * 24;
var halfamonth = day * 15;
var month = day * 30;
var now = new Date().getTime();
var diffValue = now - dateTimeStamp;
if(diffValue < 0){return;}
var monthC =diffValue/month;
var weekC =diffValue/(7*day);
var dayC =diffValue/day;
var hourC =diffValue/hour;
var minC =diffValue/minute;
if(monthC>=1){
result="" + parseInt(monthC) + "月前";
}
else if(weekC>=1){
result="" + parseInt(weekC) + "周前";
}
else if(dayC>=1){
result=""+ parseInt(dayC) +"天前";
}
else if(hourC>=1){
result=""+ parseInt(hourC) +"小时前";
}
else if(minC>=1){
result=""+ parseInt(minC) +"分钟前";
}else
result="刚刚";
return result;
}
本文作者:子叶流风
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