dateFormat
一个简简单单的格式化时间的函数，非原创，有删改
相信Date对象，大家都非常的熟悉，但是往往获取时间的时候，我们是希望可以获得一个格式化之后的函数，于是乎，我们就需要转化，本文转化的亮点在于正则表达式的熟练使用，考虑不周之处，欢迎提出您宝贵的意见。1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
let dateFormat = function(date,mask) {
let d = date;
if (!date) {
return '';
}
if (!d.toUTCString) {
d = new Date(date);
}
if (Object.prototype.toString.call(d) != '[object Date]') {
return '';
}
if (d.toString() == 'Invalid Date') {
return '';
}
if (!mask) {
mask = 'yyyy-MM-dd HH:mm:ss';
}
var zeroize = function (value, length) {
if (!length) length = 2;
value = String(value);
for (var i = 0, zeros = ''; i < (length - value.length); i++) {
zeros += '0';
}
return zeros + value;
};
return mask.replace(/"[^"]*"|'[^']*'|\b(?:d{1,4}|M{1,4}|yy(?:yy)?|([hHmstT])\1?|[lLZ])\b/g, function($0) {
switch($0) {
case 'd': return d.getDate();
case 'dd': return zeroize(d.getDate(),2);
case 'ddd': return ['Sun','Mon','Tue','Wed','Thr','Fri','Sat'][d.getDay()];
case 'dddd': return ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'][d.getDay()];
case 'M': return d.getMonth() + 1;
case 'MM': return zeroize(d.getMonth() + 1,2);
case 'MMM': return ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'][d.getMonth()];
case 'MMMM': return ['January','February','March','April','May','June','July','August','September','October','November','December'][d.getMonth()];
case 'yy': return String(d.getFullYear()).substr(2);
case 'yyyy': return d.getFullYear();
case 'h': return d.getHours() % 12 || 12;
case 'hh': return zeroize(d.getHours() % 12 || 12,2);
case 'H': return d.getHours();
case 'HH': return zeroize(d.getHours(),2);
case 'm': return d.getMinutes();
case 'mm': return zeroize(d.getMinutes(),2);
case 's': return d.getSeconds();
case 'ss': return zeroize(d.getSeconds(),2);
case 'l': return zeroize(d.getMilliseconds(), 3);
case 'L': var m = d.getMilliseconds();
if (m > 99) m = Math.round(m / 10);
return zeroize(m,3);
case 'tt': return d.getHours() < 12 ? 'am' : 'pm';
case 'TT': return d.getHours() < 12 ? 'AM' : 'PM';
case 'Z': return d.toUTCString().match(/[A-Z]+$/);
// Return quoted strings with the surrounding quotes removed
default: return $0.substr(1, $0.length - 2);
}
});
};
console.log(new Date(),'yyyy-MM-dd HH:mm:ss'); //2017-11-15 09:23:32
If you find this article helpful, you can buy me a coffee.
扫描二维码，分享此文章