10 examples of 'javascript check if string is date' in JavaScript

321
function isDateString(value) {
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  return value && (typeof value == 'string' || value.hasOwnProperty('start') && typeof value.start == 'string');
323
}

660
function is_date(str){
661
	var objRegExp = /^[0-9]{4}\-(0[1-9]|1[012])\-(0[1-9]|[12][0-9]|3[01])/;
662
	return objRegExp.test(str);
663
}

4
function isDate(date) {
5
    return (
6
        !!date &&
7
        typeof date === 'object' &&
8
        Object.prototype.toString.call(date) === '[object Date]'
9
    );
10
}

49
function isDate(value) {
50
    return /\d{2,4}-\d{2}-\d{2}[T -_]\d{2}:\d{2}:\d{2}/.test(value);
51
}

35
function isDate(value) {
36
  return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
37
}

50
function isDate(d) {
51
  return isObject(d) && objectToString(d) === '[object Date]'
52
}

24
export function isDate(value) {
25
  return typeOf(value) === 'date' && !isNaN(value.getTime());
26
}

93
export function isDate(value) {
94
	return checkPrototype(value, 'Date');
95
}

328
function isDate(d) {
329
  return typeof d === 'object' && objectToString(d) === '[object Date]';
330
}

87
function isDateValid(value) {
88
    const matched = value.match(dateRe);
89
90
    if (matched) {
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        const epoch = Date.parse(value);
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        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
}