36 lines
865 B
JavaScript
36 lines
865 B
JavaScript
|
var isDate = require('../is_date/index.js')
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @category Common Helpers
|
||
|
|
* @summary Is the given date valid?
|
||
|
|
*
|
||
|
|
* @description
|
||
|
|
* Returns false if argument is Invalid Date and true otherwise.
|
||
|
|
* Invalid Date is a Date, whose time value is NaN.
|
||
|
|
*
|
||
|
|
* Time value of Date: http://es5.github.io/#x15.9.1.1
|
||
|
|
*
|
||
|
|
* @param {Date} date - the date to check
|
||
|
|
* @returns {Boolean} the date is valid
|
||
|
|
* @throws {TypeError} argument must be an instance of Date
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // For the valid date:
|
||
|
|
* var result = isValid(new Date(2014, 1, 31))
|
||
|
|
* //=> true
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // For the invalid date:
|
||
|
|
* var result = isValid(new Date(''))
|
||
|
|
* //=> false
|
||
|
|
*/
|
||
|
|
function isValid (dirtyDate) {
|
||
|
|
if (isDate(dirtyDate)) {
|
||
|
|
return !isNaN(dirtyDate)
|
||
|
|
} else {
|
||
|
|
throw new TypeError(toString.call(dirtyDate) + ' is not an instance of Date')
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = isValid
|