10 examples of 'javascript is valid date' in JavaScript

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87function isDateValid(value) {
88 const matched = value.match(dateRe);
89
90 if (matched) {
91 const epoch = Date.parse(value);
92 if (!epoch && epoch !== 0) return false;
93
94 const d = new Date(epoch);
95 d.setTime(d.getTime() + d.getTimezoneOffset() * 60 * 1000);
96
97 if (
98 d.getFullYear() == matched[1] &&
99 d.getMonth() + 1 == +matched[2] &&
100 d.getDate() == +matched[3]
101 ) {
102 return true;
103 }
104 }
105
106 return false;
107}
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1function isValidDate(value: number | string) {
2 return !Number.isNaN(+new Date(value));
3}
3function isValid(date){
4 if(date.length !== 6) return false;
5
6 var month = parseInt(date[4] + date[5]);
7 if(month > 12 || month === 0) return false;
8
9 var today = getToday();
10 if(parseInt(today) - parseInt(date) < 0) return false;
11
12 return !isNaN(parseInt(date));
13}
15export function getValidDate(date: unknown): Date {
16 if (typeof date === 'undefined') {
17 throw new Error('expects a date');
18 }
19
20 date = date || new Date();
21 if (date instanceof Date) {
22 return date;
23 }
24
25 if (typeof date === 'number') {
26 if (isValidDate(date)) date = new Date(date);
27 }
28
29 if (typeof date === 'string') {
30 if (!isValidDate(date)) {
31 date = date.replace(/-/g, '/');
32 }
33
34 if (isValidDate(date as string)) {
35 date = new Date(date as string);
36 }
37 }
38
39 return date as Date;
40}
1export function isValidDate(year: number, month: number, date?: number): boolean {
2 const d = new Date(year, month, date);
3
4 const dateValid = d.getDate() == date;
5 const monthValid = d.getMonth() == month;
6 const yearValid = d.getFullYear() == year;
7 const valid = dateValid && monthValid && yearValid;
8
9 return valid;
10}
24public static isValidDate(year: number, month: number, day: number) {
25 return (
26 month > 0 && month < 13 &&
27 year && year.toString().length === 4 &&
28 day > 0 &&
29 // Is it a valid day of the month?
30 day <= (new Date(year, month, 0)).getDate()
31 );
32}
106function dateHandler(date) {
107 var
108 dArray, // 数组化后的日期
109 ret;
110
111 if (typeof date === 'string') { // 如果date参数是string类型
112 if (rNumberstring.test(date)) { // 如果date参数是number string类型
113 ret = new Date(date);
114 } else { // 这里重新格式化,一般都是从服务端过来的数据,必须有年月日,并且顺序是年月日时分秒毫秒,并且7个值之间有间隔符,间隔符为\D
115 dArray = date.match(rDatestring); // 从string中提取new Date需要的参数
116 if(dArray.length < 3) { // 服务端时间戳,例如NET "/Date(562941040500+0800)/"
117 ret = new Date(+dArray[0]);
118 } else { // 格式化过的
119 ret = new Date(dArray[0], dArray[1] - 1, dArray[2] || 1, dArray[3] || 0, dArray[4] || 0, dArray[5] || 0, dArray[6] || 0);
120 }
121 }
122 } else if (typeof date === 'number' || Object.prototype.toString.call(date) === '[object Date]') { // 如果date参数是number类型、date类型
123 ret = new Date(+date);
124 } else if (date == null) { // 如果不存在date参数
125 ret = new Date();
126 } else {
127 return false;
128 }
129
130 return ret;
131 }
1function checkdate (m, d, y) {
2 // discuss at: http://phpjs.org/functions/checkdate/
3 // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
4 // improved by: Pyerre
5 // improved by: Theriault
6 // example 1: checkdate(12, 31, 2000);
7 // returns 1: true
8 // example 2: checkdate(2, 29, 2001);
9 // returns 2: false
10 // example 3: checkdate(3, 31, 2008);
11 // returns 3: true
12 // example 4: checkdate(1, 390, 2000);
13 // returns 4: false
14
15 return m > 0 && m < 13 && y > 0 && y < 32768 && d > 0 && d <= (new Date(y, m, 0))
16 .getDate()
17}
115function validTime (dt) {
116 if (dt && typeof dt === 'string') {
117 var r = reTime.exec(dt)
118 if (r) {
119 var h = parseInt(r[1])
120 var m = parseInt(r[2])
121 return h >= 0 && h <= 23 && m >= 0 && m <= 59
122 }
123 }
124 return false
125}
49function isDate(value) {
50 return /\d{2,4}-\d{2}-\d{2}[T -_]\d{2}:\d{2}:\d{2}/.test(value);
51}

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